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3 steps of  MacAdam

3 steps of MacAdam

According to David L. MacAdam published in 1942 the article Visual Sensitivities to Color Differences in Daylight, in the color matching experiment, in each direction to match the color of the experimental results of the standard deviation (color matching variations standard deviation) to determine the color The capacity of the ellipse is not determined by the mere tolerance (Just Noticeable Difference). The reason for this is to avoid observing the unreasonable effects of volatility.
Macadia when the oval is the standard deviation is not directly that color, it represents the color of the resolution.
McAdam proved that the standard deviation between the standard deviation of the color difference and the color matching is three times that of the standard deviation.

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