Medical web site - CHAPTER 6 ERASING AND TOUCHING UP 251
CHAPTER 6 ERASING AND TOUCHING UP 251 Figure 6-32. Using the Color Balance tool Using Curves or Levels for Balancing Colors You ve already used the Levels and Curves tools for adjusting brightness and contrast. But they re also powerful tools for adjusting color. The key is the Channel menu at the top of the Levels and Curves tools. By default, it s set to Value, meaning that the tool will adjust the brightness of the image. But you can also adjust levels or curves of the individual color channels: Red, Green, or Blue. You can even adjust the transparency, or Alpha, channel. However, that is a more advanced technique and isn t generally useful for photographs. Levels Adjust each of the colors independently. Using the Levels tool, I decreased the red and blue highlights, and increased the green shadows (Figure 6-33).
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