Changing exposure after the fact

Photoshop CS2 adds a new feature to the ImageOAdjustments menu called Exposure. It simulates how the image would have looked if you changed the exposure setting on your camera before clicking the shutter. Think of it as an across-the-board adjustment of tonality in the image. As you can see in Figure 5-18, even a minor adjustment can have a major impact on the image!

Figure 5-18: With the Exposure adjustment, a little change goes a long way!

Earlier in this chapter, I mention that sometimes you want to apply an adjustment to only part of an image. The windows in Figure 5-18 certainly qualify! To best repair this image, I would make a selection of the windows, improve their exposure, invert the selection (select the areas of the image other than the windows), and correct the room separately. (Chapter 8 has all the info on making selections.)

The Exposure dialog box offers a couple of additional controls, too. The Shadows and Brightness sliders are designed primarily to work with very high-bit images (the special 32-bit/channel high dynamic range images), and you likely will find them too sensitive to be of much use.

Exposure is a rather specialized tool, and you probably won't find it nearly as user-friendly or effective as Curves and Shadow/Highlight. If you do actually work with 32-bit/channel images, take it for a test drive; you might decide that it fills a need.

Photoshop CS Mastery

Photoshop CS Mastery

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