How do I take a screenshot using MATLAB?
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MathWorks Support Team
on 11 Oct 2017
Edited: MathWorks Support Team
on 1 Jul 2022
Is there a way that I could use MATLAB the same way that I use software such as snipping tool or print screen? For example, I would like to run a code and save an image from a rectangular box on the screen. Is this possible?
Accepted Answer
MathWorks Support Team
on 30 Jun 2021
Edited: MathWorks Support Team
on 30 Jun 2021
This is possible to do in MATLAB by using Java libraries.
% Take screen capture
robot = java.awt.Robot();
pos = [0 0 400 400]; % [left top width height]
rect = java.awt.Rectangle(pos(1),pos(2),pos(3),pos(4));
cap = robot.createScreenCapture(rect);
% Convert to an RGB image
rgb = typecast(cap.getRGB(0,0,cap.getWidth,cap.getHeight,[],0,cap.getWidth),'uint8');
imgData = zeros(cap.getHeight,cap.getWidth,3,'uint8');
imgData(:,:,1) = reshape(rgb(3:4:end),cap.getWidth,[])';
imgData(:,:,2) = reshape(rgb(2:4:end),cap.getWidth,[])';
imgData(:,:,3) = reshape(rgb(1:4:end),cap.getWidth,[])';
% Show or save to file
imshow(imgData)
imwrite(imgData,'out.png')
Note: If you are looking to take a screenshot of a figure window, there are many other tools that are much better suited for this, for example the "print" and "getframe" functions, as well as several featured submissions to File Exchange such as "ScreenCapture" or "export_fig".
1 Comment
Yair Altman
on 22 Oct 2017
Edited: MathWorks Support Team
on 1 Jul 2022
ScreenCapture: https://www.mathworks.com/matlabcentral/fileexchange/24323-screencapture-screenshot-of-component-figure-or-screen
export_fig: https://www.mathworks.com/matlabcentral/fileexchange/23629-export_fig
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