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Lumi masking

A technique used by video compression software, which reduces quality in very bright or very dark areas of the picture, as quality loss in these areas is less likely to be visible.

Lumi masking (derived from luminance), also known as psychovisual enhancements or adaptive quantization, is a technique used by video compression software, which reduces quality in very bright or very dark areas of the picture, as quality loss in these areas is less likely to be visible. The reduction in quality (and therefore bit rate) in certain areas of the picture caused by using Lumi masking allows more bits to be allocated to the rest of the video, thus improving overall quality. Lumi masking is not perfect, however, and in some cases the degradation in quality it causes is visible.

Key Terms

adaptive quantization
definition
lumi masking
luminance
picture
psychovisual enhancements
quality
technique
usage
video compression software

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Synonymns

Lumi masking
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Last modified on May 17 2020
Content adapted from Wikipedia
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