: Oops, my shutter speed was too fast. How do I fix this light banding? I was out photographing some performance art this weekend and took a picture that I really like. I had set the camera

@Vandalay110

You can fix it almost perfectly by using the gradient tool and the divide blend modes.

EDIT: For the cleanest results, I switched to 16-bit colour mode before performing the following steps.

1) Fill in a thin strip of background with the "ideal" background (I used the gradient tool with the colour picker to get an approximation of the yellowish tones in the background) and stretch it across the whole image, then set it to divide blend mode. This will put the banding artefacts on a white background.

2) Select the same thin strip of image, Ctrl+Shift+C (Copy Merged), hide the banding/divide layer.

3) Paste the thin banding strip (Ctrl+V), hit the "/" key (lock transparency), gaussian blur ~20px, then stretch the band over the whole image using Ctrl+T (transform). Now your whole image looks like just the banding alone.

4) Set that layer to divide blend mode. Voila, banding effect is "divided out" of the original.

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