IMAGE ADJUSTMENT METHOD, PROGRAM AND IMAGE ADJUSTMENT DEVICE
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United States of America
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Nov 7, 2024
app pub date -
Jan 12, 2021
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Jan 12, 2021
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Abstract
One aspect of the present invention is an image adjustment method including: deriving a statistic from a first pixel having a first luminance and a second pixel having a second luminance co-occurring in a local region in an input image, and deriving a two-dimensional luminance histogram having the statistic as a numerical value corresponding to the first luminance and the second luminance; deriving a numerical value by weighting the two-dimensional luminance histogram by using a weighting coefficient determined according to a third luminance greater than the first luminance and less than or equal to the second luminance, and deriving a one-dimensional luminance histogram having the numerical value as a numerical value corresponding to the third luminance; and deriving a luminance conversion function to cause the one-dimensional luminance histogram derived to be converted into a predetermined histogram, and converting a luminance of each of pixels of the input image by using the luminance conversion function.
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