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P013 Digital Media

QuestionAnswer
BYTE A packet of information that consists of 8 bits. Computers typically have 8-bit data pathways, making bytes the most efficient means of transmitting data or instructions.
CAMERA RAW Pixel data that comes directly from the CCD with no further processing.
COLOR FRINDGING Color fringing, also known as chromatic aberration, is caused by the camera lens not focusing the different wavelengths of the light onto the same focal plane.
DATA COMPRESSION The use of algorithms to reduce the amount of data needed to reconstruct a file.
EPS Encapsulated PostScript is a DSC-conforming PostScript document with additional restrictions which is intended to be usable as a graphics file format.
FILE FORMAT A method for arranging the data that makes an image for storage on a disk or other media. Standard image formats include JPEG and TIFF.
GIF (Graphics Interchange Format) A standard file format most commonly used for graphics on the World Wide Web. It reduces both resolution and color data, making it less effective for photography.
GIGABYTE (GB) A measurement of digital data approximately one billion bytes (1000 megabytes).
JPEG (Joint Photographic Experts Group) A file format used with photographers and other color bitmaps. This format "compresses" image information create smaller files. These files do lose some image data.
JPEG ARTIFACTS Image defects due to file size compression. These defects appear as tiny rectangles or squarish grain.
LOSSLESS COMPRESSION Any form of file compression technique where no loss of image data occurs.
LOSSY COMPRESSION Any form of file compression technique where some loss of image data occurs.
MEGAPIXEL One million pixels in a digital camera sensor.
NEWTON RINGS An interference pattern caused by the reflection of light between two surfaces - a spherical surface and an adjacent flat surface.
NOISE Appears in an image as very fine-grained patterns of multi-colored pixels in an area
OVER SHARPEN Software sharpness will create an "optical illusion" of sharpness by making the edges more contrasty. Software sharpening is of course unable to create detail beyond the camera's resolution, it will only help to bring out captured detail.
PIXEL Picure element; is the smallest display element that makes up the images you see on a computer monitor or television.
POSTERIZATION When performing image manipulations such as tonal conversions in low bit environments (e.g. 8bits/channel mode) only a limited number of tones may be available to describe a certain area of the image. This causes visible "banding" or "posterization".
TIFF (Tagged Image File Format) An important and lossless bitmap image format common to most image processing programs
Created by: dmaww