When you browse our pages, this Jargon Buster Box can immediately show an explanation of any technical terms you may be unfamiliar with. Just click the red text links found on any page shown above to see the explanation!

If you have any problems, wish to comment on the Jargon Buster or request a term to be added please email us at info@hdi-online.co.uk

 

AGP

Accelerated Graphics Port. Dedicated slot for graphics cards.

 

Acrobat

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)

 

Acrobat Reader
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)
Adobe
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)
Analogue
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.
Aperture Card

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.

 

Application

A computer software package comprising of programs used to undertake a range of related tasks. (See also Program, Software)

Aspect Ratio

Width to height screen ratio, usually in the form of 4:3 for a standard TV or 16:9 for wide screen.

 

Artifact
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.
ANSI

American National Standards Institute. A standardised character set extension to the ASCII.

 

Anti-aliasing

Smooths the jagged effect of a bitmap image.

API

Application Programming Interface. Any coding standard that allows hardware to interact with software without the need for any special coding.

 

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).
Banner Stand

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).

 

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)
Bit
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)
Binary System
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)
Bit Depth

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.

Bitmap
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)
Book Marking

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)

 

Broadband High speed internet access.
Browser
Software used to view web pages.
Byte
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)
CAD

Computer Aided Drawing or Computer Aided Design.

 

CCD chips
The technology central to a digital camera, this is a device that captures light waves and converts them into electric signals.
CD-ROM

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.

 

Cell

Spreadsheets contain boxes known as cells. These variously contain values, formulas or text

CCD Charge Coupled Device. Light sensitive chip used in camcorders, cameras and sc
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).

 

Clip-Art

An image or set of images that can easily be used or altered in DTP or graphics programs.

 

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.

 

Colour

See "True Colour"

 

Combi-Jackets

These are very similar to Jackets except that they holds different sizes of negatives. (See also Microfilm, Fiche, Microfiche, Aperture Cards, Jackets).

 

CompactFlash
Memory card to contain digital images.
Compression

See File Compression

 

Continuous Tone
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)
CPU

Crossover cable

 

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.

 

CYMK
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)
Data
Information we require to store digitally. (See also Data File, Data Entry)
Databases
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.
Data Entry
Usually, the manual process of entering data (i.e. typing) into a data file.
Data File
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)
Data Transfer
The process of moving digital data from one computer to another. (See also CD-ROM, ZIP Discs, Data File, Zipped)
DECT

Digital Enhanced Cordless Technology.

 

Deeds

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.

 

Desktop

The background screen on the Windows platform.

 

Digitise
Term given to the conversion of analogue information (such as words and pictures) into information a computer can interpret.
Discrete Cosine Transform (DCT)

Compression algorithm used by JPEGs. Also commonly used with video compression.

 

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
Documents

We scan all types of documents, with text, colour images, drawings, etc. in any size and quantity.

Domain

Name of server or organisation that consists of an internet address.

 

Download
Process of changing the location of information from one source to another.
DPI
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)
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.

 

Drawings

Engineering drawings, plans, maps, artists drawings, any size - colour or black and white, we scan them all!

DSL Digital Subscriber Line. Large amounts of data can be tranfered over existing copper line (up to 9MB/sec) using DSL.
DTP

Desktop Publishing. Name given to the process of print production (eg books, leaflets, etc.)

 

DWG

The native file type used by AutoCAD for saving DraWinG files. For example "myfile.dwg".

 

Dye-Sublimination Printer

Instead of using "dot" technology to produce imagery, this printer uses continuous tones to produce photographic, print-like images.

 

 

 

DXF
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.
Emulsion

Light sensitive coating on film, plates or surfaces.

 

Email
Encapsulating
Essentially a "digital letter" that is capable of sending files between users.

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)

 

Entities
Usually taken to mean an individual, selectable screen items within a CAD drawing file.
EPS
Encapsulated Post Script - a common file format for page layouts. (See also TIFF, JPEG)
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.

 

Fiche

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.

Field

A space in a document or a database where information of some type can be inserted.

 

File Extension
The last three letters in a file name after the "dot". For example "myfile.tif" where "tif" is the file extension.
File Compression

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.

 

File Naming

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.

File Transfer Media

The physical means of transferring digital files from one computer to another. Usually floppy discs, ZIP discs, CD's, etc. (See also ZIP Disc)

 

Film Scanner

Scans film and slides, converting the images to digital files.

Finishing

The process of completing the final presentation of a printed graphic image. This usually involves mounting, laminating, encapsulating, framing etc.

Firewall

Protects computers from unauthorised incoming and outgoing traffic.

 

Firewire High speed computer interface designed by Apple and adopted as a standard by the IEEE.
Flashpix

File format for viewing and storage.

 

Floppy Disk

portable disc for storing upto 1.4MB (megabytes) of data. (Also see Zip and CD-ROM).

 

Foam-Board
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)
Foamex
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)
Fold-a-way

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).

Folder

A visual icon within the graphic user interface (GUI) that illustrates an area where files can be held together.

 

Fractal

Often a geometrical shape, this is an image obtained by the use of a repeted mathematical equation.

 

Frame

 

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.
G4 Compression
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)
Gateway

Point where data moves between networks.

 

Gamma
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.
Gang Scanning

Scanning several separate images at the same time with the same scanner settings.

 

Gaussian blur

Method of blurring utilised by Photoshop.

 

GIF

Graphics Interchange Format. File format, prominantly found on the internet. Only has 256 colours.

 

Gigabyte
1,048,576 Kilobytes of data (or 1,048 Megabytes of data) (See also Byte)
Graphic
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)
Graphic Aperture Size Amount of system memory used held for DMA use by the AGP bus.
Greyscale

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)

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.
G.S.M. Grams per Square Meter.
G.U.I. Graphical User Interface. Term for a computer display utilising images, icons and sounds as a method of navigation.
Halftone

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)

 

Hard Disk

The device inside the computer that stores all the files.

 

Hardware

The physical parts of a computer. Software is used to operate the hardware. (See also Software, Programs, Applications)

 

HTML

A programming language used in the production of websites. Also see XML.

 

Hub

Used in LANs to connect network nodes such as computers and hubs. The central connection point for computers in star topology networks.

 

Hue
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)
Hyperlink Commonly used on the internet, these links (often underlined in blue) act as navigation to either internal or external pages.
Icons

A graphic symbol that represents a navigation option.

IEEE Institue of Electrical and Electronics Engineers. This groups sets the standardised specification regarding communications and computer systems.
Image
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)
Imaging (verb)
The process of capturing, storing and subsequently retrieving information from physical images using scanning technology and digital storage. The original format is not significant.
Imaging (noun)
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.
Image File
The digital file that contains the data representing your "Image". Typical formats are TIFF (mono files) and JPG (colour files).
Image Only
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.
Images and Hidden Text
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.
Indexing
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)
Interpolation
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.
Intranet

Similar to the Internet but is confined to an organisation. Can also be accessed whilst offline.

 

IP

Internet Protocol. Basic means of data transferal over the internet. This is the lowest logical level of the internet.

 

Jackets

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.

 

Jargon Buster HDI's online aid to help explain any unfamiliar terminology.
JavaScript

Programming languaged used to create applets.

 

Jewel Case
The transparent, hard plastic case used to store CD's and ZIP discs. (See also ZIP discs, CD-ROM's)
JPEG
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)
Kilobyte (Kb)
1,024 bytes of data (See also Byte)
Laminating
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)
Large Format
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)
Laser Printer

A printer that will fuse toner or powder onto paper.

 

Lasso tool

Used to draw an outline around an area in an image-editting program.

 

Large Format (Printing
& Scanning)

Normally anything bigger than A3.

 

Layer

Essentially this is one image amoungst many. As layers are put on top of one another a composition is created.

 

Layer mask

Works in the same way as a mask but is applied to a single layer only.

 

LCD screen

Small colour screen. These are built into the majority of digital cameras.

 

Lineart
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)
Link
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.

Lithium-ion / Li-ion

 

Incorporating the most recent technological advancements these rechargable batteries offer a lot more power but are expensive.
Lossy
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)
Mac

A type of personal computer created by the Apple Corporation. Traditionally used in the graphics industry.

Macro

Commands or actions executed using a key, symbol or name.

Mailmerge

 

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.

 

MDF
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)
Medium Format (Film)

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)

Metadata

Information used to describe digital images.

 

Megabytes (Mb)
1,048,576 bytes of data (or 1,048 Kb of data) - See Byte.
Megapixel

If aCCD chip contains over a million pixels this is the term applied to it.

 

Microfiche

See "Fiche". This is much the same thing but the images are smaller. (See also Microfilm, Jackets, Combi-Jackets and Aperture Cards).

 

Microfilm
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)
Modem Device that connects a computer to thi Internet.
Mono
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)
Mounting
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)
MPEG Moving Pictures Experts Group. Common file format used for video editting, DVD and broadcast.
Multi-Page File
A digital file that contains images of more than one page. TIFF files can be multi-page. (See also Adobe, Acrobat, PDF)
Negatives
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)
OCR
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")
Offset Lithograph
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.
Optical Resolution
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)
Overclock

Term used for running a component higher than that recommended by the manufacturer to increase performance.

 

PC

Personal Computer.

 

PC card

Form of removable storage.

 

Pixel
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)
PDF

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.

 

PDF Normal
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.
Photo CD

Form of storing images. Created by Kodak.

Photomontage composite

Composition where several images are merged together.

 

PhotoShop

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.

 

PICT

Image format. Principally associated with the Mac operating system.

 

Pixellation
Term given when individual pixels can be seen individually.
Plug-In

An extension to an application to add extra functionality to a program.

PNG Portable Network Graphic. File format that saves an image's gamma curve to reduce differences in the appearance between Mac and PC.
PNP

Portable Network Photograph. Format of lossy compression being developed that is expected to outperform JPEG.

 

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.
Pop-Ups

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)

 

PPI
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)
Primary Colours
The basic colour used to compose other colours. Red, green and blue (RGB) is used for monitors. (See also CYMK and RGB)
Program
Computer software that can manipulate data in some manner. Not "Programme" which is more a list of forth coming events. (See also Application, Software)
Raster File
See "Bitmap". Click here for more information on Raster.
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.

Refresh rate

Rate at which a monitor can redraw the image on it's screen.

 

Reproducible See Velograph.
Resolution
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.
RGB

Red, Green and Blue, the primary additive light colours (See also Primary Colours).

 

Router Device that routes data between different logical networks.
Scanner Device for tranfering files to a format that a computer can read.
Scanning

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.

 

Scanning

(Batch)

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)

Scanning

(Individual)

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)

Scanning

(Reasons for)

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.

Scratch disc Temporary storage area used by Photoshop when RAM runs out.
Self Start CD
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)
Server

High performance computer system that serve client computers.

 

Shell Scheme

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)

Shareware

Cheap programs that are often used with the belief that the author will be paid if the user finds the program of benefit.

 

SmartMedia

Storage method for digital media.

 

Software
Binary instruction codes comprising programs and applications used to operate computer hardware. (See also Applications, Programs, Hardware)
Spell check

A program that compared the words in a document to those within a dictionary.

 

Splash Page
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.
Spreadsheet
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)
Streaming

Method of allowing files to be accessed over the net before they are complete.

 

Substrate
The material used to print an image on e.g. paper, vinyl, canvas, etc.
SGRAM Synchronous Graphics Random Access Memory. Fast memory utilised by video cards.
TCP

Transmission Control Protocol. Protocol that manages connections between two systems reliably. Can resend if necessary.

 

Text

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)

 

Template

Standard form or layout that can be reused at will.

 

Thumbnail Small image, usually used for identifying larger files.
TIFF
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)
Toolbar

A group of icons used to execute functions or programs.

 

True Colour
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)
Transparencies
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.
TWAIN A software protocol used to import files from an external device such as a scanner.
Uncompressed
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)
Unicode An extention of ASCII.
VBA

Visual Basic for Applications. Common scripting language.

 

Vector
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.
Vector Conversion
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.
Vectorising
See "Vector Conversion"
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.

Wavelet theory The theory behind the development of new algorithms that are expected to achieve higher compression thats than existing DCT technology.
Webcast

Live broadcast over the web, using streaming technology.

 

WORM

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)

Wizard

A utility that aids the user perform certain tasks.

 

WYSIWYG What You See Is What You Get. Way of describing a program that graphically illustrates other methods of page creation (for example HTML).
   
XML eXtensible Markup Language. Beyond HTML, XML can be used in more than webpages. Tags can be customised as required.
ZIP (Disc)
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)
Zipped
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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