User Guide

Chapter 5: Process mode
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. You can also click
on the arrow to automatically set it to where the blackpoint start in the image.
Midtones Specifies the midtones in an image.
Move the slider or type a number into the spin box to set the midtone. Higher values make the image
appear brighter, while lower values make the image appear darker. You can also click on the arrow to
automatically set it to the midtone of the image.
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. You can also click on the
arrow to automatically set it to where the highlights start in the image.
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 inde-
pendently, 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 black and white levels, and click OK. ACDSee Pro adjusts the image levels automatically.
Black Point picker Click the Black Point picker, and then click the image area you want to set as the black point.
Mid Point picker Click the Mid Point picker, and then click the image area you want to set as the mid point.
White Point Picker Click the White Point picker, and then click the image area you want to set as the white point.
When you click on one of the pickers and then hover over an image, the cursor changes to an eye dropper. If you look in the
status bar, you will see the RGB numbers changing as you click around the image. The numbers indicate the RGB values of
the pixel under the eye dropper. The R G B values represent the source pixel (unprocessed) and the current pixel as it
appears on the screen.
Adjusting levels automatically
You can use the Auto Levels tool to automatically correct the exposure levels of your images. Auto Levels makes the darkest image
pixels darker, and the brightest pixels brighter. You can save your options as a preset for future use.
To automatically correct an image's levels:
1. In Process mode, select Edit.
2. In the Exposure/Lighting group, click Auto Levels.
3. Select one of the following options:
Auto Contrast and Color: Adjusts color differences, brightness, and balances RGB channels.
Auto Contrast: Adjusts the color differences and brightness only.
Auto Color: Balances the RGB channels in the image, without changing the brightness or contrast.
4. Use the Strength slider to fine tune the amount of exposure you want to apply.
187