CHAPTER 2 IMPROVING DIGITAL PHOTOS Figure 2-16.
CHAPTER 2 IMPROVING DIGITAL PHOTOS Figure 2-16. The Levels dialog. Notice the values bunched up at the right (light) end: that s the white sky in Figure 2-12. Both input and output have sliders that you can play with to make the image brighter or darker, or give it more or less contrast. The three input sliders are referred to as shadow, midtone, and highlight, representing the darkest points in the image, a midpoint, and the brightest points. Sometimes you can use the histogram for guidance: drag the left input slider to where it lines up with the left edge of the thick part of the histogram, and line up the right slider with the right side of the histogram (Figure 2-17). Don t neglect to experiment with the middle input level slider, which is also called gamma value you can fine-tune the contrast of the image with it. You can also use the eyedropper buttons under the input levels slider to pick points in your image that should be all black or all white: click on the left eyedropper button, and then click on the darkest point in the image. Then do the same to match the right eyedropper to the lightest point in the image.
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