Glossary
ADJUSTMENT LAYER
A layer in a Photoshop image that adjusts the appearance of layers beneath it, and keeps editing adjustments separate from image data.
ALPHA CHANNEL
A grayscale version of the image that can be used with the color channels for saving a mask or selection.
APERTURE
The opening behind the camera lens through which light passes on its way to the image sensor (CCD/CMOS).
ARTIFACT
A flaw in a digital image.
BACKLIGHTING
The result of shooting with a light source, natural or artificial, behind the subject to create a silhouette or rim-lighting effect.
BIT (BINARY DIGIT)
The smallest data unit of binary computing, being a single 1 or 0.
BIT DEPTH
The number of bits of color data for each pixel in a digital image. A photographic-quality ...
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