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Common name for an electronic document or digital image.

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A file of which the contents have been compressed with the use of a program such as DropStuff or WinZip. It can sent via e-mail and unzipped by the recipient without losing any data. The contents can consist of one large file, or more than one file. This method is especially useful when sending someone several image files by e-mail. Most programmes will allow the sender to make the zip file self-extractable, turning the .zip file into an .exe file.
MPO, or Multiple File Format, is a camera image format, first used on Fujifilm's Real 3D W1 camera. A file contains two or more separate jpeg images. On the Fujifilm camera it's a stereo pair that gives the realistic 3D effect when combined at the viewing stage.

On some Ricoh cameras MPOs are created from the Multi-Target AF mode, where seven photos are taken in quick succession, each at slightly different focus points. The files can then be merged to create a focus stack, with incredible depth-of-field.
The way that a file is saved so it can be seen and is compatible with other applications/computers. Digital images are saved in a format such as TIFF, EPS, JPEG, PNG, BMP or Photo CD that can then be opened on different computers.
The amount of data held in a file determines its size. High resolution digital images can be 50 megabytes, for instance, while a text document may only be a few hundred kilobytes or less. Images can be compressed to save space, and folders of text and pictures can be grouped and reduced in size using programmes such as Stuffit, WinRAR or WinZip.
A lossless compression file format thats ideal for digital photography.
Format (noun) is used to describe the area of a film used by a camera to record a photo or the way a digital file is saved (see film format). Or it is the way that a file is saved so that it can be seen and is compatible with other applications and/or certain computers (see file format). 'To format' (verb) is to lay-out or organize text on a computer, or to prepare a digital disk for use with a certain type of computer.
1. A small program that enables a Macintosh computer to control things such as print drivers and USB devices. 2. In a more general computer sense, it is an alphanumerical character string appended to a file name and delimited by a full stop (period). In the file name photo.jpg, "jpg" is the extension, which tells the computer that it is dealing with a certain type of compressed image file.
Encoded instructions that appear at the beginning of a digital file to let the computer know the specifics to follow. An image file will have header info that lets the computer know the file is, for example, a jpeg.
A picture file format that some of the more advanced cameras have the option of using when taking photographs. In this mode the photograph is captured in a "raw"state direct from the camera's CCD so no automated processing is done by the camera. You then use RAW processing software such as Capture One to view and process the file on your computer giving you complete control of properties such as exposure, colour and sharpness. This mode is preferred by enthusiast and professional photographers who tailor settings to there liking. The downside is the file is not compressed by the camera, like it is in normal jpg shooting mode so you can only shoot a small number of photos before the memory card fills up.
Where pixels are removed (lost) to make the file size of a digital image smaller. When compressing images using the JPEG format you have the option of varying the level of compression. A higher level makes the file size much smaller but removes more pixels.
The standard measurement of a digital file size. One byte is eight binary digits (bits), allowing 255 possible combinations of 1s and Os. A kilobyte (KB - not to be confused with kb [kilobit]) is 1024 bytes.
A digital process that reduces the number of bits in an image to reduce the file size. The benefit is that it takes less storage space and can be e-mailed quicker. There are two types of compression – Lossy which permanently loses detail and Lossless that returns all the data. JPEG lossy compression is the common method for digital imaging and can be adjusted to offer low compression which maintains most of the quality or higher compression which starts to affect image quality.
To remove the marching ant selection from an image, returning this, or a file to its unselected state.
To bring a file from the Internet or other remote computer to your own using an internet or network connection. Or to load pictures from a digital camera using a cable connection. (Sending pictures to another computer, a camera or the Internet is "uploading".)
A file that controls a printer, scanner, disk drive or other device which is part of, or connected to, a computer.
A file format used to transfer graphics from one program or device to another.
Network technology used to link two or more computers together to ensure fast and convenient file transfer.
A larger version of a basic computer keyboard that has additional function keys which can be assigned to trigger regular actions such as printing, connecting to the internet and file saving.
A method of transferring files and data over a network. You use an FTP program to upload web pages created on your computer to a server so they can be accessed on your web site.
A universal type of image file for use on the Web. A Gif contains only 256 colours so it's best used for solid colour graphics such as logos and buttons, rather than high quality photographic images.
Thumbnail graphics displayed on the computer screen that locate files or applications. Clicking on them using the mouse to open a file or start-up a program.
Standard method of image data compression used to reduce the file size of digital images. It's known as lossy compression because there is a permanent loss of some data during the process.
A data file size that comprises 1024 bytes.
A file format that compresses video, animation and sound.
Software used by high-end postscript printers that prepares the file to be printed by converting vector images into a bitmaps.