Apple Color 1.0 User Manual download pdf (Page 195)

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Chapter 9 Primary In 195

An Example of the Luma Curve in Use

The following example illustrates how to make very specific changes to the contrast of

an image using the Luma curve. Looking at the waveform in the following image, you

can see that the sky is significantly brighter then the rest of the image. In order to bring

viewer attention more immediately to the subject sitting at the desk, you would want

to darken the sky outside the window, without affecting the brightness of the rest of

the image.

1 Before making any actual adjustments, pin down the midtones and shadows of the

image by adding a control point to the curve without moving it either up or down.

Adding control points to a portion of a curve that you don’t want to adjust, and leaving

them centered, is a great way to minimize the effect of other adjustments you’re

making to specific areas of an image. When you add additional control points to adjust

the curve, the unedited control points you placed will help to limit the correction.

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Apple Color 1.0 User Manual Page 195

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