(High bit-depth) The Luma Corrector effect lets you adjust the brightness and contrast in the highlights, midtones, and shadows of a clip. You can also specify the color range to be corrected by using the Secondary Color Correction controls.

Output

Lets you view adjustments in the Program monitor as the final results (Composite) or tonal value adjustments (Luma), display of the alpha matte (Mask) or a tritone representation of where the shadows, midtones, and highlights fall (Tonal Range).

Show Split View

Displays the left or upper part of the image as the corrected view and the right or lower part of the image as the uncorrected view.

Layout

Determines whether the Split View images are side by side (Horizontal) or above and below (Vertical).

Split View Percent

Adjusts the size of the corrected view. The default is 50%.

Tonal Range Definition

Defines the tonal range of the shadows and highlights using threshold and threshold with falloff (softness) controls. Click the triangle to display the Tonal Range Definition controls. Drag a square slider to adjust the threshold values. Drag a triangle slider to adjust the softness (feathering) value.

Note: Choose Tonal Range from the Output menu to view the different tonal ranges as you adjust the Tonal Range Definition sliders.

Tonal Range

Specifies whether the luminance adjustments are applied to the entire image (Master), the highlights only, midtones only, or shadows only.

Brightness

Adjusts the black level in a clip. Use this control so that the black picture content in your clip appears as black.

Contrast

Affects the image’s contrast by adjusting the gain from the clip’s original contrast value.

Contrast Level

Sets the clip’s original contrast value.

Gamma

Adjusts the image’s midtone values without affecting black and white levels. This control causes changes in contrast, much like changing the shape of the curve in the Luma Curve effect. Use this control to adjust images that are too dark or too light, without distorting shadows and highlights.

Pedestal

Adjusts an image by adding a fixed offset to the image’s pixel values. Use this control with the Gain control to increase an image’s overall brightness.

Gain

Affects the overall contrast ratio of an image by adjusting brightness values by multiplication. The lighter pixels are affected more than darker pixels.

Secondary Color Correction

Specifies the color range to be corrected by the effect. You can define the color by hue, saturation, and luminance. Click the triangle to access the controls.

Note: Choose Mask from the Output menu to view the areas of the image that are selected as you define the color range.

Center

Defines the central color in the range that you’re specifying. Select the Eyedropper tool and click anywhere on your screen to specify a color, which is displayed in the color swatch. Use the + Eyedropper tool to extend the color range, and use the – Eyedropper tool to subtract from the color range. You can also click the swatch to open the Adobe Color Picker and select the center color.

Hue, Saturation, and Luma

Specify the color range to be corrected by hue, saturation, or luminance. Click the triangle next to the option name to access the threshold and softness (feathering) controls to define the hue, saturation, or luminance range.

Soften

Makes boundaries of the specified area more diffuse, blending the correction more with the original image. A higher value increases the softness.

Edge Thinning

Makes the specified area more sharply defined. The correction becomes more pronounced. A higher value increases the edge definition of the specified area.

Invert Limit Color

Corrects all colors except for the color range that you specified with the Secondary Color Correction settings.