Can I overlay a large number of image?

Hi all,

Beginner matlaber here, looking for some advice. I have a series of frames from a video showing an oscilating object. What I'd like to do is overlay all of them. I have used imfuse to overlap two of them but I'm wondring how I would start overlaying 500 images. I also wonder if just summing the image as matrices of data would be better? The frame are .tif and are all the same size.

A few pointers or push in the right direction would be much appriecated.

Cheers,

Sam

Answer 1

[Constantino Carlos Reyes-Aldasoro]

Hello

You can always overlay things by summing them, say your data is a 3D stack and each layer is one of your frames,

a = zeros(50,50,6);
a(1:10,1:10,1) = 1;
a(11:20,11:20,2) = 1.2;
a(31:40,1:10,3) = 0.8;
a(1:10,31:40,4) = 2;
a(41:50,1:10,5) = 3;
a(1:10,41:50,6) = 0.5;
% add a line to show where each frame is
a(1:3,:,:)=0.5;
a(:,1:3,:)=0.5;
montage(a)

Now, I can add all the frames and show together

imagesc(sum(a,3));
colormap gray