Binary Mask and gray scale image

I have a binary mask and i want to extract the value of a grayscale image in a other variable. How can i do this ?

(if the pixel (159,300) in the mask = 1, and the pixel(159,300)in the grayscale image = 67, return 67 in the variable).

Thanks for your help.

Stéphan

Answer 1

[Sugar Daddy]

I = imread('circle.jpg');
I = rgb2gray(I);
M = I<125;
figure,subplot(121),imshow(I)
subplot(122),imshow(M)

To access Image index where mask value is 1, simply apply Logical Indexing

L = I(M);
figure,plot(L)

[abrassart stephan]

En utilisant la variable seg comme masque, extraire les éléments intensite_region de l’image imgf qui appartiennent à la région segmentée dans seg (c.-à-d. les éléments qui sont à 1 dans seg).

imgf(510,628) 
seg(510,628) 
intensite_region = imgf where pixel of seg=1
intensite_region must be (510,628)