How to calculate rgb chromaticity value for set of images?

[KALYAN ACHARJYA]

How to calculate rgb chromaticity value for a single image?

[Sajina Rose]

using the chromaticity formula.......

Rchrom=R/R+G+B;

Gchrom=G/R+G+B;

Bchrom=B/R+G+B;

But I'm confused in how to calculate average RGB values for a whole image?????

[Walter Roberson]

https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

meanRGB = squeeze( sum(sum( double(YourImage), 1), 2) ./ (size(YourImage,1).*size(YourImage,2)) );

Or if you have R2019a or later,

meanRGB = squeeze(mean(YourImage, [1 2]));

[Sajina Rose]

Thank you sir..........and also one thing I want to enhance(adjust) two channels of the image by assuming third channel is unchanged.......How can I do it sir??

Answer 1

[Image Analyst]

To convert ot grayscale, use rgb2gray().

To change the colors or enhance the colors, try the attached demos.