how do i add a background image to face image

i have multiple face pictures and background pictures, i want to put them together. set 1 as background and put the face pictures on them.

Answer 1

[Image Analyst]

See the FAQ http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F and my attached copy and paste demos.

Or you can make a mask of what pixels you want to replace, then do

image1(mask) = image2(mask);

This will replace image1's pixels with the pixels of image2, but only within the masked region. mask is a binary/logical image that is true where you want to replace the pixels and false where you don't want to replace the pixels.