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- AVI
Audio Video Interleave: AVI, a Microsoft format, is the most common
format for audio/video data on the PC
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Bitmap
A digitized image that is mapped into a grid of pixels therefore the
image is resolution-dependent; the color of each pixel is defined by
a specific number of bits; see also raster
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BMP
Windows bitmap: file format built into Windows and native to Microsoft
Paint, supports 1-24 bit depth and index color.
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CD-R
Compact Disc – Recordable
- CD-RW
Compact Disc – ReWritable
- CMYK
A subtractive color model for printing that
uses fine dots of four different colors, the three process colors are
cyan, magenta, and yellow combined with black. These four ink colors,
when screened and printed at various angles, allow printing of full
color photos or art.
- dpi/ppi
dpi stands for dots per inch, it refers to a measurement of output device
resolution. ppi stands for pixels per inch, it refers to units of measurement
for digital images. The terms dpi and ppi are often used interchangeably.
- EPS
Encapsulated PostScript: file format created by Adobe with vector (line
art data only; therefore it can be scaled with no loss of quality) and
raster (bitmap data that cannot be scaled or edited) options, EPS files
normally include a low resolution screen preview
- GIF
Graphics Interchange Format: lossy compression algorithm, supports 1-8
bit depth, 256 index color only
- Grayscale
A continuous tone image comprising black, white , and gray data only
- Halftone
A simulation of continuous tones by the use of black, white and grey
pixels, to the human eye the black pixels blend with the nearby pixels
to create continuous shades of tone
- Index color
A color table in the computer that defines a finite number of colors
- JPEG
Joint Photographic Experts Group: a lossy compression algorithm that
allows you to adjust the amount of loss, trading between compression
and quality.
- Line art
Images containing only black and white pixels, also known as bilevel
images
- Lossy
Image compression that functions by removing minor tonal and/or color
variations, causing visible loss of detail at high compression ratios.
- LZW compression
Lempel-Ziv-Welch (not a file format): Non-lossy compression algorithm
that allows for compression of image data without loss of quality
- MPEG
(pronounced M-peg): Moving Picture Experts Group: is the name of family
of standards used for coding audio-visual information (e.g., movies,
video, music) in a digital compressed format. The major advantage of
MPEG compared to other video and audio coding formats is that MPEG files
are much smaller for the same quality. This is because MPEG uses very
sophisticated compression techniques.
- Non-lossy
Image compression without loss of quality
- PDF
Portable Document Format: the file format of Adobe’s Acrobat specification.
- Raster
A digitized image that is mapped into a grid of pixels therefore the
image is resolution-dependent; the color of each pixel is defined by
a specific number of bits, see also bitmap
- RGB
An additive color model based on red (R), green (G), and blue (B) light;
RGB is used by computers, televisions, and film recorders to display
colors; mixing equal amounts of red, green, blue light will produce
white light
- TIFF
Tagged Image File Format: common and portable file format for saving
bitmap scans, does not compress data but offers LZW compression option;
useful for moving files between Macintosh and PC platforms.
- Vector
Resolution-independent graphic image that can be defined by mathematical
equations and scaled with no loss of quality
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