How to extract RGB values of each pixel from an image?

I need to extract the RGB values of each pixel of a given image in a serial data format like R1:G1:B1, R2:G2:B2, R3:G3:B3... and so on.

Answer 1

[Image Analyst]

Try this:

rgbImage = permute(rgbImage, [3,1,2])
serialValues = rgbImage(:)'

This will give you [r1,g1,b1, r2,g2,b2, r3,g3,b3, r4,g4,b4, ...] which is a row vector taken from the original RGB image in column major order.

[Ankit Bhattacharyya]

The code is working fine but it gives column-wise data, I need it row-wise.

[Walter Roberson]

rgbImage = permute(rgbImage, [3,2,1]);
serialValues = rgbImage(:)';

[Ankit Bhattacharyya]

Thanks a lot for the code..it worked fine.

Answer 2

[Adam]

r = im(:,:,1);
g = im(:,:,2);
b = im(:,:,3);

assuming img is an RGB image of n*m*3 size, for any n, m

Answer 3

[Image Analyst]

You can use impixel() to get the [r, g, b] values in a 1-by-3 array, if that's what you meant by "serial":

row = 5; % Whatever.
column = 10
rgbPixelValue = impixel(rgbImage, column, row)

Otherwise explain in detail, with an example, exactly what "serial data format" means to you.