Image artifact using imagesc

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Jonathan 2014-9-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/155595-image-artifact-using-imagesc

编辑： Matt J 2014-9-24

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Consider the asymmetry in these two images. They should appear symmetric. Why don't they?

figure,colormap gray; 
subplot(1,2,1)
imagesc(eye(2)*eps, [-1 1]); 
title('imagesc(eye(2)*eps, [-1 1])'), axis image
subplot(1,2,2)
imagesc(-eye(2)*eps, [-1 1]); 
title('imagesc(-eye(2)*eps, [-1 1])'), axis image

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Matt J 2014-9-24

编辑：Matt J 2014-9-24

在 MATLAB Online 中打开

Both images appear perfectly symmetric to me, if symmetric means image=tranpose(image). However, I think this displays it better,

    subplot(1,2,1)
    imagesc(eye(2)*eps, [-1 1]*eps); 
    title('imagesc(eye(2)*eps, [-1 1])'), axis image
    subplot(1,2,2)
    imagesc(-eye(2)*eps, [-1 1]*eps); 
    title('imagesc(-eye(2)*eps, [-1 1])'), axis image