040000 tree 45702e1f4ddd58d1ba873a2e419458f6a36e81e8	imagemagick
040000 tree 26d15fc87f0ff9acb8341bd4d37832986010ae87	perceptualdiff
040000 tree 73ef8656245903ff6fb97195ab92ef5fffa47ccf	ply-image