How can I apply Image fusion for combining wavelenghts of 3 images?

How can I apply Image fusion for combining wavelenghts of 3 images?

Answer 1

[Image Analyst]

Cast to double. Add the images with appropriate weights for each spectral channel. Then divide by the number of images.

[Zohreh Tavakkoli]

I have tried , but I could not get the desired image . I want just see 3 images together using image fusion , could you plz give me some codes?

[Image Analyst]

imageOut = (double(image1)+double(image2)+double(image3))/3;