How to mask a binary image with a mask?

Friends I have a small problem with a image and a mask , I need to make a mask in a binary image how can do this?

Answer 1

[Image Analyst]

Pass your mask into your binary image. If you want to blacken outside the mask, one way to do it is:

binaryImage(~mask) = false;

Another way is

binaryImage = binaryImage & mask;

If you don't know how to create a mask, you can use thresholding, or draw by hand like in my attached demos.