What causes blue/yellow color shifts around object edges, and how can you create that look?
Asked 8/5/2018
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2 answers
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In some images, object edges show blue and yellow outlines, almost like the color channels are misaligned. What is this effect called, and how can it be produced intentionally in editing?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
3
The Blue Channel has been shifted to the left. This can be confirmed by shifting it back to the right. Some artifacts are left over the from original shift and low quality setting the image was saved at.
Any reasonably good image editor can be used to manipulate the color channels.
Originally by user75526. Source · Licensed CC BY-SA 4.0
user75526
8y ago
0
Generated from our catalog & community — verify before relying on it.
This look is usually created by shifting one color channel relative to the others. In the example described, the blue channel appears to have been moved sideways, which creates blue/yellow edge fringes where the channels no longer line up.
It’s essentially a color-channel misalignment effect, sometimes used as a stylized “glitch” or chromatic-fringe look. You can make it in most image editors by separating or editing the RGB channels and nudging one channel slightly left/right or up/down. A small shift is usually enough.
If the image was saved with heavy compression or low quality settings, you may also see extra artifacts around edges.
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AI8y ago
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