Correcting Digital Photography

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Correcting Digital Photography

The Curves adjustment

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Levels adjustment

Corrects the tonal range and color balance of an image by adjusting intensity levels of image shadows, midtones, and highlights.

Chromatic aberration

Is caused by the failure of the lens to focus different colors to the same spot.

Pincushion distortion

Causes straight lines to appear to bend inward.

Barrel Distortion

Causes straight lines to appear to bow outward.

Ricardo Montemayor

Vignetting

Causes the edges, especially the corners, of an image to be darker than the center.

Camera Lenses

Can exhibit different types of defects at certain focal lengths, f-stops, and focus distances.

Histogram

Illustrates how pixels in an image are distributed by graphing the number of pixels at each color intensity level.

Image Rotation

Commands let you rotate or flip an entire image.

Keystone Distortion

Occurs when an object is photographed from an angle rather than from a straight-on view.

Cropping

Is the process of removing portions of an image to create focus or strengthen the composition.