| AGP |
Accelerated Graphics Port. Dedicated slot
for graphics cards.
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The trade-name of a software package by the "Adobe"
company that specializes in a combination of multi-page file
storage, indexing, viewing, page retrieval,
printing and word searching all within one package. (See also Multi-Page
File, Acrobat Reader, PDF)
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The name of the software program produced by "Adobe"
that enables the viewing of the Adobe Acrobat proprietary file
format (PDF files). This is freely available form
Adobe however, the software to create Acrobat files may be purchased
under license from Adobe. (See also PDF, Adobe,
Acrobat) |
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A large software company that
specializes in software applications catering for image enhancement,
manipulation and storage. Famous for its "PhotoShop",
"Acrobat" and other well known software packages
(See also Acrobat Reader,
Acrobat and PDF) |
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| Electrical voltage is
varied to create distinctive auditory and visual patterns. Examples
of technologies utilising this technology are vinyl records,
magnetic tape and CCD chips. |
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A card, nominally 187mm (7.4") x 83mm (3.3"), containing
a small aperture that holds a single 35 mm negative. Information,
such as the drawing number may be written on the card. Cards from
American owned companies may also be punched with holes called "Hollerith
Code". This code may contain the drawing number, drawing size etc.
(See also Microfilm, Jackets,
Combi-Jackets, Fiche,
Microfiche, Drawing
Negatives) For more information on Aperture Cards, click
here.
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A computer software package comprising
of programs used to undertake a range of related tasks. (See also
Program, Software)
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| Aspect Ratio |
Width to height screen ratio, usually in the form of 4:3 for a
standard TV or 16:9 for wide screen.
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An apparent defect in an image caused by the process
of reproduction that may also have been generated either in the hardware
or the software. |
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| ANSI |
American National Standards Institute.
A standardised character set extension to the ASCII.
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| Anti-aliasing |
Smooths the jagged effect of a bitmap image.
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| API |
Application Programming Interface. Any coding
standard that allows hardware to interact with software without
the need for any special coding.
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| ASCII |
American Standard Code for Information
Interchange. Standardised code that can be read by any text
editor, word processor or desktop publishing program(DPI).
(Also see ANSI and Unicode). |
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A floor standing graphic display usually comprising a single flat
printed graphic on paper of film supported by a simple frame system.
May be easily erected and dismantled for carrying. (See also Pop-Ups
and Fold-a-Ways).
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| Bi-Level |
An image that has black and white pixels
only. This is the lowest level of bit
depth and requires only one bit (on or off)
to define the black or white parts of the image. Used for text
files and drawings that comprise lines only i.e. lineart. (See also
Bit, Greyscale and True
Colour) |
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A computer "switch" that may be in only one of two states,
on or off, and represented by I and 0 respectively. Mathematically,
this involves counting with a base of 2 (not 10 as normally used)
and this counting system is known as the "Binary" system. (See also
Binary
System, Byte, Bit
Depth, Bitmap) |
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A counting system, used by computers, that uses only
1's and 0's. Binary means to a base of 2 and this is similar to our
normal counting system that is to the base 10. (Decca = 10 and decimal
= to the base 10) (See also Bit, Bitmap,
Binary
System, Bit
Depth, Byte, Bit) |
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The numbers of "bits" used to define the numbers
of shades of colours (or just black or white or greys for greyscale)
represented by one pixel. Consequently, defining the bit depth also
defines the amount of data "read" whilst scanning. (See also Bitmap,
Byte, Binary System,
Scanning, Bit, Greyscale, Lineart, Primary Colours, RGB, True Colour). For further information on Bit
Depth, click
here.
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A grid like arrangement of pixels
for storing an image in a digital file. Each pixel colour is known
numerically by the number of bits used to define
it. It is also know as a "raster" file. (See also Raster) |
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Adobe parlance. The provision of a screen-based
index (similar to a book index) that when "clicked" on retrieves,
and displays, selected page images stored within the file. (See
also PDF, Acrobat, Acrobat
Reader)
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| Broadband |
High speed internet access. |
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A computer "word" comprising eight "bits"
and having available a total number of 256 different combinations.
This is the standard used in measuring computer file sizes. (See also
Kilobytes, Megabytes
and Gigabytes) |
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Computer Aided Drawing or Computer
Aided Design.
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| The technology central
to a digital camera, this is a device that captures light waves
and converts them into electric signals. |
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Compact Disc - Read Only Memory.
Similar to the common music CD but records digital data instead
of music. Is known as a "worm" device. (See also WORM)
Click
here for further information on CD-ROM storage. Click
here for advantages offered by digital storage.
|
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| Cell |
Spreadsheets contain boxes known as cells. These variously contain
values, formulas or text
|
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| CCD |
Charge Coupled Device. Light sensitive
chip used in camcorders, cameras and sc |
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| Client |
Computer (such as the one you jmmay be viewing this page with)
connected to a network. This computer is a client when requesting
information from a source (for example, a server).
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| Clip-Art |
An image or set of images that can easily be used or altered in
DTP or graphics programs.
|
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| Clone Tool |
(AKA rubber stamp) A common tool used for image retouching and
correction. This tool is used to erase specific details from an
image and replace it with another.
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See "True Colour"
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These are very similar to Jackets except
that they holds different sizes of negatives. (See also Microfilm,
Fiche, Microfiche,
Aperture Cards, Jackets).
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| Memory card to contain
digital images. |
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See File Compression
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The variation of a tone of one colour e.g. from black
or red to white, in a continuous smooth transition fading gently onto
the other colour. This is the opposite to lineart.
(See also Halftone, Lineart) |
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| Central Processing
Unit. This is the main processor for all the computer's
functions. Increasing the size and speed of the CPU increases
the complexity of the work possible. |
|
A twisted paie Ethernet cable in which the receive and transmit
wires have been transposed, allowing two devices, usually
computers but sometimes hubs, to be directly connected.
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Cyan, Yellow, Magenta and Black.
Cyan, yellow and magenta being the "subtractive" colours
used to produce printed images on a white background. "Subtractive"
simply means that as colour is removed (i.e. not added) from the colours
on the page eventually white, the colour of the paper results. K
is used to describe black (instead of B) to distinguish it from the
"B" used in RGB. (See also RGB) |
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Information we require to store digitally. (See also
Data File, Data Entry) |
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A software package for storing
data that also uses an index to locate the data
for subsequent retrieval. Retrieved data may be in the original form
or may be in a rearranged form dependent on how the index has been
used to recover the data. Original databases were known as "Flat File"
being data records serially stored with sophisticated indexes for
recovering the data stored within the records. Current databases are
known are "Relational" and these databases relate common data within
the records to each other. This minimizes storage space and speeds
recovery. |
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Usually, the manual process of entering data (i.e. typing)
into a data file. |
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A digital file that contains only "data"
or information that is required to be stored. "Programs"
manipulate and use the data in the manner we require. (See also Data,
Data Entry) |
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The process of moving digital data
from one computer to another. (See also CD-ROM,
ZIP Discs, Data File,
Zipped) |
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| DECT |
Digital Enhanced Cordless Technology.
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A legal document. We scan all types of
deeds including deeds that cannot be taken apart and those with
wax seals, those on velum etc.
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| Desktop |
The background screen on the Windows platform.
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| Term given to the conversion
of analogue information (such as words and pictures) into information
a computer can interpret. |
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| Discrete Cosine Transform
(DCT) |
Compression algorithm used by JPEGs. Also commonly used with video
compression.
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| DMA |
Direct Memory Access. Allows hardware
to circumvent to need to go through the CPU and go directly to system
memory. See Graphic Aperture Size and AGP |
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We scan all types of documents, with text,
colour images, drawings, etc. in any size
and quantity.
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| Domain |
Name of server or organisation that consists
of an internet address.
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| Process of changing
the location of information from one source to another. |
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Dots Per Inch. The dots of ink
used by an offset lithographic printer to produce the image. Also,
the tiny dots created by ink jet printers when they shoot a droplet
of ink onto the page. Hence this is a measurement of the printers
resolution. Ink dots are very much smaller
than pixels and several dots of ink are used
to represent a pixel. (See also Resolution,
PPI) |
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| Drawing recovery |
The process of improving a poor original drawing. The image is
taken from paper or film and presented as a clearer digital image.
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Engineering drawings, plans, maps, artists drawings, any size -
colour or black and white, we scan them
all!
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| DSL |
Digital Subscriber Line. Large
amounts of data can be tranfered over existing copper line (up to
9MB/sec) using DSL. |
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| DTP |
Desktop Publishing. Name given to the process
of print production (eg books, leaflets, etc.)
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The native file type used by AutoCAD for saving DraWinG
files. For example "myfile.dwg".
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| Dye-Sublimination
Printer |
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Instead of using "dot" technology to produce imagery,
this printer uses continuous tones to produce photographic,
print-like images.
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Drawing Interchange(X) Format. A
file format used by CAD programs to enable the
interchange of CAD files between them e.g. AutoCAD
and others. |
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Light sensitive coating on film, plates or surfaces.
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| Essentially a "digital
letter" that is capable of sending files between users. |
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Covering a printed image or graphic, both front and back,
with a transparent material that adheres to the graphics'
surfaces. Used for the purposes of enhancing the graphic (e.g.
a glossy, matt or satin finish) and, more importantly, protecting
the graphic from moisture as well as dust and dirt or exposure
to sunlight. The graphic is not normally mounted before encapsulation.
Encapsulation covers all edges of the graphic by using slightly
larger front and rear coverings that adhere to each other
outside the edges of the graphic. (See also Laminating
and Mounting)
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Usually taken to mean an individual, selectable screen
items within a CAD drawing file.
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Encapsulated Post Script - a common
file format for page layouts. (See also TIFF,
JPEG) |
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| Ethernet |
A shared media 10 Mbits/sec LAN employing 10 Base-T twisted pair
cabling. Defined by IEEE 802.3 in which all devices on the network
share the total bandwidth.
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A Fiche is a large black and white negative nominally 148 mm x
104 mm that usually contains a large number of small images of pages
from documents. (See also Microfilm, Jacket,
Combi-Jacket, Aperture
Card, Fiche and Microfiche).
Click
here for more information on Fiche and Microfiche.
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| Field |
A space in a document or a database where
information of some type can be inserted.
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The last three letters in a file name after the "dot".
For example "myfile.tif" where "tif" is the file extension. |
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The reduction in size of an image file. JPEG
files use "lossy" compression and operate by removing minor colour
variations. "Non-lossy" compression, such as LZW (Lempel-Ziv-Welch
- the names of the designers) compress files without loss of data.
(See also File Compression, File Transfer Media, G4 Compression, JPEG, Lineart, Tiff, Uncompressed). Click
here for more information on File Compression.
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The provision of a name for a file. When carried out by the scanning
equipment automatically, it results in the serial format similar
to 001.tif, 002.tif, 003.tif etc. When carried
out manually, may be any name required within the limitations of
the numbers of characters permitted by the operating system. Manual
file naming is more costly than automatic file naming. Click
here for information on File Types.
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The physical means of transferring digital files from one computer
to another. Usually floppy discs, ZIP discs, CD's, etc. (See also
ZIP Disc)
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Scans film and slides, converting the images to digital files.
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The process of completing the final presentation of a printed graphic
image. This usually involves mounting, laminating,
encapsulating, framing etc.
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| Firewall |
Protects computers from unauthorised incoming and outgoing traffic.
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| Firewire |
High speed computer interface designed by Apple and
adopted as a standard by the IEEE. |
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| Flashpix |
File format for viewing and storage.
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| Floppy Disk |
portable disc for storing upto 1.4MB (megabytes)
of data. (Also see Zip and
CD-ROM).
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A type of rigid, mounting board for large format prints
made from foamed polystyrene. This board is of light weight and enables
large, graphics to be easily carried. It is available in a variety
of thickness'. (See also Foamex, Mounting,
MDF) |
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A type of solid, rigid mounting board for large format
prints made from polystyrene. A material that is waterproof and hence,
suitable for outdoor use. It is available in a variety of thickness'.
(See also Mounting, Foam-Board,
MDF) |
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A large format graphic display using flat panels that fold along
vertical hinges. Usually used for exhibition and display purposes.
Unlike the Pop-Up, it does not normally have
curved surfaces and hence is often a lower cost option. (See also
Pop-Up and Banner Stand).
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| Folder |
A visual icon within the graphic user interface (GUI)
that illustrates an area where files can be held together.
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| Fractal |
Often a geometrical shape, this is an image obtained by the use
of a repeted mathematical equation.
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Frame
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A defined area that hold text or an image. It is usually
drawn in a word processing or DTP program
but is not always visable. |
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The CCITT Group 4 compression
technique as applied to a digital file for storage. The CCITT G4 compression
technique is currently used by fax machines to transmit files at a
reduced size. The compression technique is mainly used for Lineart
and Text files. (See also Lineart,
Lossy, Uncompressed) |
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| Gateway |
Point where data moves between networks.
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A term used in digital imaging that was borrowed from
the photographic industry. In the business of scanning,
gamma is a tone correction that is always a non-linear adjustment.
Linear adjustments are the brightness and contrast controls. Gamma
adjusts both brightness and contrast together at the same time in
different proportions and is hence non-linear. |
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Gang Scanning
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Scanning several separate images at the
same time with the same scanner settings.
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| Gaussian blur |
Method of blurring utilised by Photoshop.
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| GIF |
Graphics Interchange Format. File format,
prominantly found on the internet. Only has 256 colours.
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1,048,576 Kilobytes of data (or 1,048 Megabytes of data)
(See also Byte) |
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Usually a large format printed image used for display
or advertising purposes. May be floor standing, hung, positioned on
a wall etc. May also be mounted on board and finished with protective
coatings or may be flexible to enable the image to curve. (See also
Mounting, Laminating,
Finishing, Pop-Up,
Banner Stand, Fold-a-Way) |
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| Graphic Aperture Size |
Amount of system memory used held for DMA
use by the AGP bus. |
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A type of scanning that caters for black, white and shades of grey.
Usually having 256 shades of grey from black to white e.g. looks
like a black and white photo. No other colours involved. Typically
8 bit but can be 12 bit or higher. (See also Bi-Level,
Lineart and True Colour)
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| Greyscale image |
Using 8 bits per pixel (and thus providing 256 shades
of grey), a greyscale image creates the impression of a continuous
tone in black and white images. |
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| G.S.M. |
Grams per Square Meter. |
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| G.U.I. |
Graphical User Interface. Term
for a computer display utilising images, icons and sounds as a method
of navigation. |
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Continuous tones simulated by overlapping printed "dots". The dots
may vary by in size and position to provide the effect required
(See also Continuous Tone)
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| Hard Disk |
The device inside the computer that stores all the files.
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The physical parts of a computer. Software
is used to operate the hardware. (See also Software,
Programs, Applications)
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| HTML |
A programming language used in the production of websites. Also
see XML.
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| Hub |
Used in LANs to connect network nodes such as computers and hubs.
The central connection point for computers in star topology networks.
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Hue
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The colour the eye perceives. On a computer monitor
it is determined by the extent to which an individual, or pair, of
either red, green or blue (RGB) primary colours predominate. (See
also RGB and CYMK) |
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| Hyperlink |
Commonly used on the internet, these links (often underlined
in blue) act as navigation to either internal or external pages. |
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| Icons |
A graphic symbol that represents a navigation option.
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| IEEE |
Institue of Electrical and Electronics
Engineers. This groups sets the standardised specification
regarding communications and computer systems. |
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The picture you wish to view, e.g. a photograph or
print, or more often, the display on a computer monitor showing the
picture you require. An "Image" file is a data file that
stores the digital data relating to an "Image" (see also
Data File, Image File) |
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Imaging (verb)
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The process of capturing, storing and subsequently retrieving
information from physical images using scanning
technology and digital storage. The original format is not significant. |
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A software program that is part of the Microsoft "Windows"
operating system. To start the program, go to "Start", "Programs",
"Accessories" and open "Imaging". It is principally used for viewing
and printing raster image files. |
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The digital file that contains the data representing
your "Image". Typical formats are TIFF (mono files)
and JPG (colour files). |
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Adobe Acrobat
parlance. It means simply images of pages within one multi-page file
using a "book like" index shown on the screen. The Adobe PDF
file offers the usual page-view, page-search, and print facilities.
In Adobe parlance, the "book like" index creation is called "Book
Marking". This is most useful for sales catalogues, technical manuals,
reports etc. |
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Adobe Acrobat
parlance. This is the next level up from "Image
Only" and is the intermediate file level. It provides an additional
facility of being able to search for individual words held within
the page images of a multi-page file.
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A system of using key words or numbers used to identify
any file, that may be stored in a different location, for retrieval
and viewing. For example, this could use a spreadsheet or database
in one directory, used with links to files stored in a different directory.
(See also File Naming) |
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The addition of new pixels to
increase the resolution of a file. The pixel colour is based upon
the colour of the adjacent pixels in the original file. |
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| Intranet |
Similar to the Internet but is confined to an organisation. Can
also be accessed whilst offline.
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| IP |
Internet Protocol. Basic means of data transferal
over the internet. This is the lowest logical level of the internet.
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These are cellophane holders of size nominally 148 mm x 104 mm
into which strips if film black and white negatives are inserted.
It appears similar to a Fiche (See also Microfilm,
Fiche, Microfiche,
Aperture Cards, Jackets, Combi Jackets). Click
here for further information on Jackets.
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| Jargon Buster |
HDI's online aid to help explain any unfamiliar terminology. |
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| JavaScript |
Programming languaged used to create applets.
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Jewel Case
|
The transparent, hard plastic case used to store CD's
and ZIP discs. (See also ZIP discs, CD-ROM's) |
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Joint Photographic Experts Group.
The group that defines the compressed file
type that uses the extension jpg e.g."myfile.jpg". It is used for
greyscale and colour files and, when compressed, some of the data
is lost. The file type is a public domain file type. (See also TIFF,
EPS, Lossy) |
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1,024 bytes of data (See also Byte) |
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Covering a printed graphic with a thin transparent material
that fully adheres to its surface. No covering on the back of the
graphic is provided. It is used for the purposes of enhancing the
graphic image (e.g. a glossy, matt or satin finish) or protecting
the graphic from damage, dust and. dirt or exposure to sunlight. The
graphic is normally mounted on to a board before laminating and the
lamination material does not go beyond the edges of the mounting board.
(See also Encapsulating and Mounting) |
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Large format film size refers to transparencies or
negatives of 5" x 4" or the next size up, 10" x 8" this
being four times the size of the 5" x 4" area. These sizes
will provide the very best film images as they are nominally fourteen
times and sixty times larger respectively than the area of a 35mm
film! (See also Medium Format - Film Size)
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| Laser Printer |
A printer that will fuse toner or powder onto paper.
|
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| Lasso tool |
Used to draw an outline around an area in an image-editting program.
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Large Format (Printing
& Scanning)
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Normally anything bigger than A3.
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| Layer |
Essentially this is one image amoungst many. As layers are put
on top of one another a composition is created.
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| Layer mask |
Works in the same way as a mask but is applied
to a single layer only.
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| LCD screen |
Small colour screen. These are built into the majority of digital
cameras.
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A type of image comprising black lines only
on a light background e.g. drawings, plans, maps etc. The line is
always a hard, black line without any shades of grey usually and on
a white background. With etchings, the black and white is reversed
so the lines are white and the background is black. Consequently,
digital files contain only black or white pixels
and hence require only one bit depth (i.e. two
states "on" and "off") to define the image data. (See also Text,
Bi-Level, Greyscale,
Bit Depth, Mono, Data)
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A digital connection between a computer screen item
(say a word, number, image etc) and typically another file or web
page etc. The screen item may be visually identified in some manner
to indicate the link exists or it may simply be the position on the
screen of the word or number that identifies it as having a link.
When you "click" on the red text, you are using a link. |
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Lithium-ion / Li-ion
|
Incorporating the most recent technological advancements
these rechargable batteries offer a lot more power but are expensive. |
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|
| Types of file compression
(e.g. JPEG) that reduce file sizes by removing
minor colour variations. This will reduce the quality of images
at high compression, particularly if the image is repetedly
saved. (See also Pixellation) |
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| Mac |
A type of personal computer created by the Apple Corporation. Traditionally
used in the graphics industry.
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| Macro |
Commands or actions executed using a key, symbol or name.
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| Mailmerge |
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| Mask |
A method of marking an image so that areas can be editted or not,
or even saved at will to be used later on. Masks can also define
whether part of an image is transparant or opaque.
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Medium Density Fibre board. A
type of low cost, compressed fibre board that is commonly available
in sheets of varying thickness from timber and DIY suppliers. Used
for mounting graphics and also for mouldings and building work domestic
applications. Can be heavy; Foam Board is much lighter. (See also
Foam Board, Foamex
and Mounting) |
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35mm is the most common film size and each image measures nominally
35mm x 24mm on the roll of film. Medium format is for larger types
of cameras made by the likes of Bronica, Mamiya, Hassleblad, Rollec,
Pentax etc. The image sizes on these types of film are typically
60mm x 45mm, 60mm x 60mm, 60mm x 70mm and generally up to 60mm x
90mm. These images are generally three to four times larger in area
compared to 35mm film and therefore, provide a better quality image.
(See also Large Format - Film size)
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| Metadata |
Information used to describe digital images.
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|
1,048,576 bytes of data (or 1,048 Kb of data) - See
Byte. |
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| Megapixel |
If aCCD chip contains over a million pixels this is the term applied
to it.
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|
See "Fiche". This is much the same thing but
the images are smaller. (See also Microfilm,
Jackets, Combi-Jackets
and Aperture Cards).
|
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|
|
A generic word describing several types of film negatives,
all of which are used for storing small images of pages, drawings
etc. Click
here for further information. (See also Fiche,
Microfiche, Jackets,
Combi-Jackets and Aperture
Cards) |
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| Modem |
Device that connects a computer to thi Internet. |
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Short for "Monochrome". Strictly speaking, it means an
image having one colour only (any hue) but without any other colours
i.e. shades of one hue only. Mono is now frequently taken to mean
to black, white, and shades of grey and confusingly, this is also
the definition of "Greyscale". Consequently all monochrome images
in shades of black and white are also "Greyscale" images and vica
verca. However, "Greyscale" is only shades of black and
white whereas Monochrome may be shades of blue or red etc. (See also
Bi-level, Lineart, Greyscale
and Text) |
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Placing a printed graphic onto a rigid, flat surface
with an adhesive to enhance its rigidity and presentation. Large format
printed graphics are commonly mounted on "Foam
board" or "Foamex" but may be mounted on
any suitable material e.g. MDF. (See also Finishing,
Foam Board, Foamex
and MDF) |
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| MPEG |
Moving Pictures Experts Group.
Common file format used for video editting, DVD and broadcast. |
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A digital file that contains images of more than one
page. TIFF files can be multi-page. (See also
Adobe, Acrobat, PDF)
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Film you put in your camera may be a "positive" or a
"negative". When developed, negatives are used for printing photographic
prints (i.e. photographs as you know them) and to enable this, they
have the colours reversed i.e. red is green, green is red etc. Most
old negatives are black and white (actually greyscale). Colour negative
film is what the average person would buy for a 35mm APS compact or
SLR camera. (See Transparencies, Greyscale,
Bi-Level) |
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Optical Character Recognition. The
scanning of text to a digital file and simultaneous conversion to
a text font i.e. letters in an text form editable
in a suitable application. (See also "Images
and Hidden Text") |
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A long established printing process that involves taking
inks from a "lithographic" plate via a transfer drum from
which the ink is printed on the paper. A high volume printing process. |
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The maximum resolution measured in PPI (Pixels
Per Inch) that a digital camera or scanner is capable
of storing in a digital file without any manipulation (i.e adding
pixels by estimating what they should be) of the image. (See also
Interpolation, Resolution,
PPI) |
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| Overclock |
Term used for running a component higher than that recommended
by the manufacturer to increase performance.
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| PC |
Personal Computer.
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| PC card |
Form of removable storage.
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A picture element. Digital images are made up of tiny
squares called pixels and each pixel is defined digitally by a number
of "bits". The pixel contains the colour information
from which the image is composed. On screen, the pixels merge together
and fool the eye into seeing a continuous tone. (See also Continuous
Tone, Resolution, DPI,
PPI) |
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Portable Document Format. A proprietary file
type used by Adobe "Acrobat".
The reader for this file type is freely available from Adobe. However,
the software to produce these files is available
for purchase under licence from Adobe. (See also PDF, Adobe, Acrobat, Book Marking, Images and Hidden Text). Click
here for further information on PDF.
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PDF Normal
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Adobe Acrobat parlance. This name may be confusing
at first, but it indicates the highest level of facility within the
PDF file. This level adds the ability to correct the words on the
page image as well as retaining all the existing facilities with the
"Images and Hidden Text" files. See also PDF, Adobe, Acrobat, Book Marking, Images and Hidden Text. |
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| Photo CD |
Form of storing images. Created by Kodak.
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| Photomontage composite |
Composition where several images are merged together.
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Popular and powerful graphics software
by "Adobe" that is widely adopted. "PhotoShop"
is used both professionally and by amateurs for all types of graphical
manipulation and enhancement.
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| PICT |
Image format. Principally associated with the Mac operating system.
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| Term given when individual
pixels can be seen individually. |
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| Plug-In |
An extension to an application to add
extra functionality to a program.
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| PNG |
Portable Network Graphic. File
format that saves an image's gamma curve to reduce differences in
the appearance between Mac and PC. |
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| PNP |
Portable Network Photograph. Format of lossy
compression being developed that is expected to outperform JPEG.
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| Polyester film |
A translucent plastic drawing sheet used for technical
drawings. This translucent property enables copies of the drawings
to be easily made by shining a light through the film. Also see Velograph. |
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A floor mounted, large format, graphic display that is supported
by a special frame system usually using diagonal cross bracings
that may be easily and rapidly dismantled and re-erected. May have
straight or curved surfaces or with rounded ends. Used for exhibition
and display purposes and can be quite large. Reduces to a small
size to increase portability. (See also Shell
Schemes, Banner Stands and Fold-a-Ways)
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Pixels Per Inch. The definition
of resolution for a scanning device and the
number of pixels/unit length present in a digital
file. (See also Pixel, Resolution,
DPI) |
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The basic colour used to compose other colours. Red,
green and blue (RGB) is used for monitors. (See also CYMK
and RGB) |
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Computer software that can manipulate
data in some manner. Not "Programme" which is more a list of forth
coming events. (See also Application, Software) |
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See "Bitmap".
Click
here for more information on Raster. |
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| Red Text |
When you click on the red text links actually in the Jargon
Buster Box, this will take you to a either deeper levelof explanation
(where one is necessary) or to an associated explanation within
the Jargon Buster.
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| Refresh rate |
Rate at which a monitor can redraw the image on it's screen.
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| Reproducible |
See Velograph. |
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Offset lithograph, inkjet and laser
printers and computer screens all compose their images of dots. Resolution
is the number of dots or pixels per unit length.
Dots per inch (DPI) for printing or pixels per
inch (PPI) for scanning. (See also PPI,
DPI, Optical Resolution,
Interpolation, Image, Image File). Click
here for further information on Resolution. |
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Red, Green and Blue, the primary additive light colours (See also
Primary Colours).
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| Router |
Device that routes data between different logical networks. |
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| Scanner |
Device for tranfering files to a format that a computer
can read. |
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The process of taking a physical image, normally on paper or similar,
and replicating the image in a digital form for storage on a computer.
(See also Scanning (Batch), Scanning
(Individual) Resolution, PPI,
Pixels, Aperture Cards, Drawing Negatives,
Scanning (Reasons for)). Click
here for more information on the necessity of bureau scanning.
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Scanning
(Batch)
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Scanning a "batch" of documents (drawings, pages, plans),
manually or automatically, using the same, previously defined, scanner
settings for scanning all the documents. (See also Scanning,
Scanning (Individual), Resolution,
PPI, Pixels)
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Scanning
(Individual)
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For each item, the prior setting of the scanner parameters
to obtain the optimum digital image for the each document being scanned.
In practice, a pre-scan is carried out and the scanner parameters
set after examining the pre-scan. For difficult images, several scans
may be required. (See also Scanning, Scanning
(Batch), Resolution, PPI,
Pixels)
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Scanning
(Reasons for)
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Click
here for a useful page that shows the majority of reasons why
scanning is usually out. This will be of help if you are preparing
a case for scanning.
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| Scratch disc |
Temporary storage area used by Photoshop
when RAM runs out. |
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A CD, when placed into the CD drive tray of the computer
and closed, that will automatically start a program, located on the
CD. (See also Program, Application) |
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| Server |
High performance computer system that serve client
computers.
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A printed, large format, graphic display specifically designed
to fit your chosen number of standard exhibition wall panels. These
panels are erected by exhibition contractors and are used to define
the area purchased by exhibitors for their display stands. The shell
scheme provides low cost, full size, seamless graphic images to
completely cover all standard wall panels. (See also Banner
Stands, Pop-Ups and Fold-a-Ways)
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| Shareware |
Cheap programs that are often used with
the belief that the author will be paid if the user finds the program
of benefit.
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| SmartMedia |
Storage method for digital media.
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Binary instruction codes comprising programs
and applications used to operate computer
hardware. (See also Applications,
Programs, Hardware) |
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| Spell check |
A program that compared the words in a document to those within
a dictionary.
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An opening screen image shown when a program starts.
It is shown for only a short time and then automatically continues
to the next image. |
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A large cellular matrix displayed on a computer screen
where each cell can be related to another cell by a mathematical formula.
It is used for carrying out mathematical manipulation of the data
placed in the cells and has the benefit of immediately showing the
effect on all of the data when a change is made to one cell only.
Widely used for financial modeling and asking "What if …" questions.
(See also Database) |
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| Streaming |
Method of allowing files to be accessed over the net before they
are complete.
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The material used to print an image on e.g. paper,
vinyl, canvas, etc. |
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| SGRAM |
Synchronous Graphics Random Access
Memory. Fast memory utilised by video cards. |
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| TCP |
Transmission Control Protocol. Protocol that
manages connections between two systems reliably. Can resend if
necessary.
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Well you know what this is - it's letters on a white background!
Usually taken to mean black letters on a white background. (See
Bi-level, Lineart,
Greyscale, Mono)
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| Template |
Standard form or layout that can be reused at will.
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| Thumbnail |
Small image, usually used for identifying larger files. |
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Tagged Image File Format.
A common image file format using the .tif extension. Used for colour
or black and white images in uncompressed form. Group
4 compression can be used with this file type but only for bi-level
images. (See EPS, JPEG, G4
Compression, Bi-level, and Lineart) |
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| Toolbar |
A group of icons used to execute functions or programs.
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A type of colour scanning for defining a range of 16.7
million colours. Comprises of three colour channels red, green and
blue (RGB) each at 8 bit. In binary code 2 raised to the power 8 =
256 bits for each colour channel. Hence three channels at 8 bit results
in a total of 24 bit. The total number of colours possible is 256
x 256 x 256 = 16,777,216 colours. (See Greyscale
Bi-level and Lineart) |
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Images on film that have the same colours as the original
image. Also known as slides when used for projecting onto screens.
Slides may have the colour saturation enhanced to counteract the effect
of the image looking washed out that can occur if viewed on a screen
when ambient light is present. Negatives have the colours reversed
in readiness for printing. May be 35mm, medium
format or large format. (See also Negatives). Click
here for more information on scanning transparancies. |
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| TWAIN |
A software protocol used to import files from an external
device such as a scanner. |
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A digital file in its original form without any file
compression having been applied. Alternatively,
a previously compressed file that has had the compression removed.
(See also File Compression, Lossy,
G4 Compression and JPEG) |
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| Unicode |
An extention of ASCII. |
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| VBA |
Visual Basic for Applications. Common scripting
language.
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Vectors are lines originating from a common point being
defined by their angle to some position (say 12:00 noon position)
and by their length. Vector files are produced in drawing programs,
such as AutoCAD. With a vector file, the data is stored as a mathematical
formula (defining the vectors) and the program does this by relating
all data to a common origin. (See also Aperture Cards, Drawing Negatives, Raster, Vector Conversion). Click
here for more information on Vector files. |
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The process of converting paper drawings into CAD
drawing files. Initially, the drawings are scanned, using a large
format scanner, and this produces a raster (or
bitmap) file. This is usually a TIFF
file. The TIFF file is then converted by software
to a different type of file suitable for use by CAD drawing software.
This is known as a vector file and the file
type is usually a DWG or DXF file. The process is also known as "Vectorising"
(See also Raster, Bitmap,
Vector, DXF, DWG,
CAD, Software, Aperture Cards, Drawing
Negatives). Click
here for further information on Vector Conversion. |
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See "Vector Conversion" |
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| Velograph (or
reproducible) |
A type of drawing paper, ofter a polyester, transparent material,
capable of having the image of an original paper or film drawing
copied onto it to provide a copy of the original drawing. The copied
drawing is often modified slightly. This saves re-drawing the original
to incorporate the small changes required. Not required when CAD
drawing is used. Also see polyester film.
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| Wavelet theory |
The theory behind the development of new algorithms
that are expected to achieve higher compression
thats than existing DCT technology. |
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| Webcast |
Live broadcast over the web, using streaming
technology.
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Write Once Read Many. A type of digital
storage device that retains it's data and once written, the data
cannot be changed. Once the data is written on it, an irreversible
physical change takes place and hence, the data cannot be changed.
(See also CD-ROM)
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| Wizard |
A utility that aids the user perform certain tasks.
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| WYSIWYG |
What You See Is What
You Get. Way of describing a program that graphically
illustrates other methods of page creation (for example HTML). |
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| XML |
eXtensible Markup Language. Beyond
HTML, XML can be used in more than webpages. Tags
can be customised as required. |
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A type of magnetic data storage disc made by Iomega housed
in a plastic case slightly thicker than a floppy
disc. It originally had the capacity to contain 100 Mb (megabytes)
, but is now available in 100 Mb and 200 Mb versions. Can be written
to and erased and used again. Much faster and with a larger capacity
compared to a floppy disc (1.4Mb capacity) Not a WORM device. (See
also WORM, CD-ROM) |
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A digital file that has been compressed.
Compression may use WinRar, PKZip, Winzip or other similar forms of
file compression. Used for reducing file size for data transfer. Typically
used before sending files over the Internet. (See also File
Compression) |
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