User Guide

GNU Image Manipulation Program
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Propagate Mode The examples will be about the following image (zoom x8):
Figure 15.156: Original image
• More White: Pixels will be propagated from upper Value pixels towards lower Value pixels. So bright areas will enlarge.
Figure 15.157: More White
Bright pixels have been propagated to dark pixels in the four directions : top, bottom, right and left. Filter applied several times
to increase effect.
• More Black: Pixels will be propagated from lower Value pixels towards upper Value pixels. So dark areas will enlarge.
Figure 15.158: More Black