How to remove the grey margin from the imshow image

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I'm analysing the MRI data with the imshow function. But every time the image pop out in a small window with a large grey (or white if I save it) margin around it. I have to zoom in the image in order to select the ROI.
Is there a code that can remove or reduce the margin as well as show the image in a larger window so that I don't have to double click it to full screen every single time?
Please see my code below. Thank you very much!
%% Draw kidney left t1 ROIs
slice =4 ;
figure; imshow(Maps.kidney.t1(:,:,slice),[0 1500]); colormap('jet');
r = drawrectangle('Position',[32 84 3 3]), wait(r);

Answers (1)

Image Analyst
Image Analyst on 6 Dec 2022
You're probably saving it with exportgraphics or saveas instead of imwrite. Use imwrite instead when you save your image.
  9 Comments
Shuyang Zhang
Shuyang Zhang on 7 Dec 2022
The image with a small white padding is good enough for me. Thank you very much for your help!

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