How do you convert the left picture (a) into the right picture (b) using image processing toolbox?

From the left picture (a), there is a "delamination area" which surrounds the hole and has bright yellow color (lighter than the rest of the material which has darker yellow). This "delamination area" is the one that got converted into black colored area in the right picture (b), while all the other color got converted into white. Atm, I used CorelDraw to convert picture a to picture b. I want to know how to do this in MATLAB using image processing toolbox.

Thanks.

Answer 1

[Matt J]

[R,G,B]=imsplit(imread('Image.png'));

BW=imfill( bwareaopen(R>130 & G>130 & B>110,10)  ,'holes');

imshow(~BW)

[Muhammad Fiky]

thanks