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How Digital Photography Works, Second Edition by Ron White

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Glossary

A

aberration

A distortion in an image caused by a flaw in a mirror or lens.

achromatic color

A color with no saturation, such as light gray.

acquire

A software menu selection to scan from within the program (if it is TWAIN compliant).

ADC (Analog-to-Digital Converter)

A device that measures electrical voltages and assigns digital values to them.

airy disc

A disc of light caused when a pinpoint of light is diffused to form concentric halos about the original point.

aliasing

The noticeable repeated patterns, lines, or textures in any photographed or scanned subject that conflict with the pattern of an electronic sensor’s pixel arrangement. For example, diagonal lines represented by square pixels will produce jagged lines.

analog

The measurement and recording ...

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