How to use imshow with a structure ?

I have a loop that plots on figure for each different value of the counter, and each frame is stored in a variable M: for k:..... M(k)=getframe(gcf) end The problem is that M is a structure now and i cant use it with the videofig function from file exchange:

https://nl.mathworks.com/matlabcentral/fileexchange/29544-figure-to-play-and-analyze-videos-with-custom-plots-on-top

What can I do ?

[Adam]

So is your question how to use imshow with a structure or how to use the linked file exchange functionality with a structure? They don't seem to be related.

[Mohamad Hussein khalife]

Hi adam, Well if there is a way to use imshow with a structure it will help my problem with the function from the file exchange.

Answer 1

[Stephen23]

S = getframe(...)
imshow(S.cdata) % for TrueColor image (RGB).
imshow(S.cdata, S.colormap) % for indexed image.

[Mohamad Hussein khalife]

Hi stephen, I tried your method and this is what matlab showed me :

Error Too many input arguments were passed to imageDisplayParsePVPairs.

the S is in a loop so at then end of the loop I have a structure of 600 elements(1x600 frames) and I'm trying to use them all, do you know how ? and thank you for your help

[Stephen23]

@Mohamad Hussein khalife: what I showed you will work for a scalar structure, i.e. the output of one getframe call, just like my answers shows. If you have a non-scalar structure, then imshow can only be called for any one element of that structure, e.g. to show them one at a time:

for k = 1:size(S)
    imshow(S(k).cdata)
    ... whatever processing
end

After reading the help from the FEX submission videofig, you could probably just define an anonymous function like this, where S is your non-scalar structure:

videofig(numel(S), @(n) imshow(S(n).cdata))

You should also read this, to understand the comma-separated list that you were probably generating without realizing it:

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

[Mohamad Hussein khalife]

yes it worked thanks a lot