Adjusting Levels


Next you ll adjust the image s levels:

  1. Choose Window Histogram to display the Histogram palette.

  2. From the Layers menu, choose New Adjustment Layer Levels. The layer should name itself Levels 1; click OK.

    In the Histogram palette, and the Levels dialog box (see Figure H5.6), notice the histogram: The pixels are clumped into the center, which indicates that the image needs a contrast adjustment. The graph is also devoid of lines in the highlights and shadows. (The pixel cluster on the left indicates that most of the pixels are dark, which is consistent with the image being a night scene.) You can increase the overall contrast by moving the sliders to spread the highlights, midtones, and shadows over a broader range of values.

    click to expand
    Figure H5.6: RGB levels

  3. Move the White slider toward the center until the input level reads 198. Move the Black slider until it reads 36. Move the midtone slider until it reads 1.05 and click OK. You ll see a marked improvement in the contrast of the image.

  4. Notice the histogram in the Histogram palette. The pixels are now spread over a much broader range.

  5. Save.




Photoshop CS Savvy
Photoshop CS Savvy
ISBN: 078214280X
EAN: 2147483647
Year: 2004
Pages: 355

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