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Teach Yourself Adobe Photoshop CS2.pdf - Online Public Access ...

Teach Yourself Adobe Photoshop CS2.pdf - Online Public Access ...

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This document was created by an unregistered ChmMagic, please go to http://www.bisenter.com to register it. ThanksTrace Contour, like several of the previous filters, works better on some pictures if you apply it several times (see Figure 16.19). The TraceContour dialog box has a slider setting for the level at which value differences are translated into contour lines. When you move the slider,you are setting the threshold at which the values (from 0255) are traced. Experiment to see which values bring out the best detail in yourimage. Upper and Lower don't refer to the direction of the outline. Lower Outlines specifies where the color values of pixels fall below aspecified level; Upper Outlines tells you where the values of the pixels are above the specified level.Figure 16.19. The image was traced several times with different settings.I like to use this filter to place different tracings on different layers and then merge them for a more complete picture.

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