https://www.tutorialspoint.com/dip/grayscale_to_rgb_conversion.htm
Grayscale to RGB Conversion - Tutorialspoint
Grayscale to RGB Conversion Advertisements We have already define the RGB color model and gray scale format in our tutorial of Image types. Now we will convert an color image into a grayscale image. There are two methods to convert it. Both has their own m
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색상을 가진 이미지 -> Grayscale 이미지
평균 공식 : (R + G + B) / 3
빛의 파장 등을 고려한 새로운 공식 : ((0.3 * R) + (0.59 * G) + (0.11 * B))