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Suppose I introduce the same amount of noise in individual channels of a YUV image of 420 format (chroma has been downsampled). Which image is the most noticeable, the one with noisy Y, U, or V?

April 26, 2017channels chroma format image individual introduce noise

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Suppose I introduce the same amount of noise in individual channels of a YUV image of 420 format (chroma has been downsampled). Which image is the most noticeable, the one with noisy Y, U, or V?

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Noise in the Y dimension will be most noticeable. However, YUV is often poorly defined and the differences in noise perception are often not as large as expected since there is luminance information in the U and V channels.