RGB to grayscale image conversion online:
Color image to black and white it was very simple to convert Color images to Black and White. upload your Color image and Click the download button the Black and White image will be download in your local disk.
Gray RGB color code has equal red,green and blue values:
R = G = B
For each image pixel with red, green and blue values of (R,G,B):
R' = G' = B' = (R+G+B) / 3 = 0.333R + 0.333G + 0.333B
This formula can be changed with different weights for each R/G/B value.
R' = G' = B' = 0.2126R + 0.7152G + 0.0722B
R' = G' = B' = 0.299R + 0.587G + 0.114B
Pixel with RGB values of (30,128,255)
The red level R=30.
The green level G=128.
The blue level B=255.
R' = G' = B' = (R+G+B) / 3 = (30+128+255) / 3 = 138
so the pixel will get RGB values of: