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Correcting Images

A lot of your time working in Photoshop will be used correcting images so that they are displayed in all their splendor. Most cameras capture a decent image, but rarely do images come right off the camera in perfect contrast, brightness, and color. In traditional photography and development, even the most experienced developer might spend days or weeks developing a photo to get the desired result from the film negative. Photoshop makes these corrections much faster and provides immediate results.

Brightness/Contrast and Auto Contrast

The Brightness/Contrast command is the easiest correction concept to understand, and use of the tonal adjustments is also simple. However, Brightness/Contrast is also the least flexible and the least powerful of the image-correction tools. The Brightness/Contrast dialog, shown in Figure 9.21, consists of a pair of sliders and their related numeric fields, along with OK and Cancel buttons and a Preview check box. It can be used on the active layer or on an active selection. It always affects all selected color channels equally, but you can apply it to channels individually by selecting the target channel(s) in the Channels palette.


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