jngwl
img=imread(\'C:\Users\GWL\Desktop\arun.jpg\');
imshow(img,\'Border\',\'tight\');
frame=getframe(gcf);

% method 1
imwrite(frame.cdata(:,:,1),\'test.png\');

% method 2
imm = frame2im(frame);
imwrite(imm,\'test2.png\');

imshow显示图片

image

test.png(灰度图像)

test

test2.png

test2

image

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