How can i get RGB value if i have position(x,y)

if i have position of image(pixel) . How can i get RGB value of this position?

Answer 1

[Image Analyst]

Note that row = y and is the first index, not the second index.

redValue = rgbImage(y, x, 1);
greenValue = rgbImage(y, x, 2);
blueValue = rgbImage(y, x, 3);

Answer 2

[Andrew Fowler]

Since RGB images are really 3D matrices, you can use the squeeze command :

pixelRGB = squeeze(yourImage(x,y,:));

Answer 3

[Sukuchha]

use function impixel if you have image processing toolbox

P = impixel(RGB,c,r)