Question

I am analyzing some experimental data in the form of .tiff multi frames. Withins these tiff files i need to visualize and compare some specific sequences of frames. I want to generate a figure that contains the frames i have chosen from the files i have chosen. The file list and frames indexes list are generated with a user interface, which calls a plot function when parameters are filled.

The problem : What is the best solution so as to plot, with an optimal size BUT keeping square images (like the original), the chosen frames ? Simpler, how to choose the position and size of each frame i plot in the figure ?

I have tried with sub plot : it works but I can’t manage to control the images size.

pos=0;
for j = 1:length(file_list)
    for i = 1:length(index_list)
         pos=pos+1;
         subplot(size(file_list,1),length(index_list),pos)
         a =imagesc(imread(file_list{j,:},index_list(i))); 

I have also tried

for j = 1:length(file_list)
    for i = 1:length(index_list)
         a =imagesc(imread(file_list{j,:},index_list(i))); 
         set(gca,'Units','Pixels', 'Position', [10+100*i 10+100*j 100 100]);

But it seems like i can’t set this individually without overwriting the last modification.

Finally, i have considered using “montage”, but the way I save the images in a list doesn’t seem to be ok.

    frm_list=zeros(1,length(FL)*length(index_list));
for j = 1:length(FL)
    for i = 1:length(index_list)
        a =(imread(FL{j,:},index_list(i)));
        frm_list=[frm_list a];
    end
end

montage(frm_list,'Size', [length(FL) length(index_list)]); 

Thanks
JC

Answer 1

You can use axis image to keep the same aspect ratio of the original image.

subplot('Position', [left bottom width height]) allows you to specify the relative position of the image to the figure window.

If you want to use a command other than imagesc, you can scale the data range of the image before drawing , then use colormap to apply false coloring to the image.