How to detect clear bubbles

Hello everyone,

I have three colors in my image in which I want to detect the red region as bubble. For that I have to remove the green and black regions present in and outside the red bubble for clear detection of bubble. Like this I have a so many images for which the bubble position will keep on changing. Could anyone please suggest a way to do it?

Answer 1

[KSSV]

I = imread('download.jpg') ;
R = I(:,:,1) ;
G = I(:,:,2) ;
B = I(:,:,3) ;

[y,x] = find(R==255) ;

imshow(I)
hold on
plot(x,y,'.k')

[shsi@145]

Hi,

Thanks for your answer.

But it can detect only red region. It cannot remove or club green+black regions