how to generate a binary spatial mask?

I have two images and i want to generate a mask for one of them by using a corelation between them.can anyone help me with this?

Answer 1

[Image Analyst]

Use xcorr2() to do the correlation but I have no idea what you plan on doing with that output image to make a mask. What are you thinking? Threshold it or something?????

[Kotti]

Actually , I have two registered images and want to blend them to create a mosaic, so i wanted to create a spatial mask.

[Image Analyst]

Try imfuse() or imshowpair().