How to Handle Moiré in a Scanned Photo
By ImgHeal · Updated
Investigate repeating interference patterns before applying global blur.
Identify the repeating pattern
Inspect a patterned shirt, printed halftone, and a smooth region. Moiré can appear as waves or false color that were not visible in the original at normal size. Preserve a source capture before testing corrections.
Try capture alternatives
Compare another supported scan resolution or a careful camera copy when the original is safe to handle. If software offers a descreen option, test it on a duplicate. Judge at matched output size; simply viewing at a different zoom can change the apparent pattern.
Review detail after correction
A strong descreen or blur treatment can remove lettering and fabric texture along with the interference. Check edges and faces before accepting it. Keep a copy with some remaining pattern if eliminating it would damage the information you need.
Check before you finish
- Compare patterns at matched viewing size.
- Check lettering after descreening.
Continue with a related guide
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