English Dictionary

Mach band

noun

Any of a series of bands of slightly different shades of grey that make up an optical illusion where the contrast between the bands appears to be exaggerated as soon as they contact one another.

The Mach band is a visual illusion that occurs when there is a sharp contrast between two adjacent areas of different brightness.

意味（1）

Any of a series of bands of slightly different shades of grey that make up an optical illusion where the contrast between the bands appears to be exaggerated as soon as they contact one another.