Monday, March 14, 2011

Adobe Photoshop Brightness And Contrast Command

The Brightness/ Contrast command provides the least complicated controls for changing overall brightness and contrast levels in an image. It dose not allow you to make changes to individual colour channels; it makes the same adjustment to every tonal range of the image.

1. To change brightness and contrast for an entire image, or for a selection, choose Image > Adjust > Brightess/Contrast. Drag the Brightness and Contrast sliders to the right or lift, or enter a value in the entry boxes (-100 to +100). OK the dialogue box.

2. If you are making adjustments to a selection, click the preview button to see, on screen, the result of the settings you choose.

3. Choose Image>Adjust>Auto Contrast (Ctrl/Command + Alt + Shift + L)to automatically adjust the contrast for an image or sele ction. Highlightes should appear lighter the shadows darker resulting in an overall improvement in the image. Auto Contrast dose not adjust individual channels in an image. It makes highlightes appear lighter and shadows darker by mapping the lighter and darkest pixels in the image to white and black respectively.


Shawn said...

This option is usable if you want to beautify your own photos.

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