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Adjust image levels in ACDSee

Adjusting image levels in ACDSee

Adjusting image levels

You can use the Levels tool to precisely adjust the contrast and light levels in your images. You can save your options as a preset for future use.

To adjust image levels:

  1. In Edit Mode, on the Edit Panel, click Exposure, and then select the Levels tab.

  2. Do one of the following:

  3. Set the options as described below to adjust the contrast and light levels manually.

  4. Click Auto and select a menu option to automatically adjust image properties.

  1. Do one of the following:

  2. Click Apply to apply your changes and set options on another tab.

  3. Click Done to apply your changes and close the Levels tool.

  4. Click Cancel to discard all changes and close the tool.

Levels options

Channel

Specifies the brightness or color channel you want to adjust.

Shadows

Specifies the blackpoint of an image.

Move the slider or type a number from 0 to 255 into the spin box to define the blackest area of an image. As the value increases, the dark colored areas of the image become darker.

Midtones

Specifies the gamma correction in an image.

Move the slider or type a number from 0.00 to 2.00 into the spin box to set the amount of gamma correction. Higher values make the image appear brighter, while lower values make the image appear darker.

Highlights

Specifies the whitepoint of an image.

Move the slider or type a number from 0 to 255 into the spin box to define the whitest area of an image. As the value increases, the light colored areas of the image become lighter.

Clipped %

Indicates how much of the image detail is lost due to blackpoint and whitepoint correction.

Shadows picker

Click the Shadows picker and then click the image area you want to set as the blackpoint.

Midtones picker

Click the Midtones picker and then click the image area you want to set as the gamma correction value.

Highlights picker

Click the Highlights picker and then click the image area you want to set as the whitepoint.

Auto

Select one of the following options:

  • Adjust Contrast: automatically analyzes and adjusts image contrast.

  • Adjust Color and Contrast: automatically analyzes and adjusts each color channel independently, and then adjusts the contrast.

  • Adjust Color and Brightness: automatically analyzes and adjusts image color and brightness.

  • Tolerance: opens the Tolerance settings dialog box. Specify the maximum clipping percentage for Shadows and Highlights, and click OK. ACDSee adjusts the image levels automatically.

Reset

Discards all changes and reverts to the original image levels.

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