Brightness/Contrast

Use the Brightness/Contrast command - among the Adjust commands in the Image menu - to alter the overall brightness or contrast of the image.

The brightness of an image is a measure of its overall lightness; the contrast is a measure of the difference between lighter and darker tones. Both values are set by sliders in the "Brightness/Contrast" dialog. Sliding to the right increases the brightness/contrast; sliding to the left decreases them. The current value for both brightness and contrast is shown as 0 before any changes are made. You can set the value for each at anything between -127 and 128, these being relative to the current value.

image\ppBrightnessContrastDlg.gif

Note that as you move the sliders the changes immediately take effect on screen. If you would like to cancel the changes just click on Cancel to exit the dialog and return to the previous state. Otherwise click on OK to close the dialog and keep the changes.

Since the Brightness/Contrast command acts on all channels at once, that is you can’t make changes to individual color elements within the image (red, green, blue, for instance), you may want to look at Curves.

See:

Adjust Image