ACD Systems ACDSee 14 User's Guide download pdf (Page 180)

ACDSee 14 User Guide

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

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 black and white levels, and click OK. ACDSee 14 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 around the image with a selected eye dropper you will see the RGB numbers changing to reflect 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 Edit mode, in the Exposure/Lighting group, click Auto Levels.

2. 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.

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ACD Systems ACDSee 14 User's Guide Page 180