StudyGuide
Cropping
Is the process of removing portions of an image to create focus or strengthen the composition.
Keystone distortion
It occurs when an object is photographed from an angle rather than from a straight-on view.
The Image Rotation
It commands let you rotate or flip an entire image.
A histogram
It illustrates how pixels in an image are distributed by graphing the number of pixels at each color intensity level.
Camera lenses
Vignetting
causes the edges, especially the corners, of an image to be darker than the center.
Barrel distortion
causes straight lines to appear to bow outward.
Chromatic aberration
is caused by the failure of the lens to focus different colors to the same spot.
Levels adjustment
Corrects the tonal range and color balance of an image by adjusting intensity levels of image shadows, midtones, and highlights.
The Curves adjustment lets
lets you adjust points throughout the tonal range of an image (from shadows to highlights).