Numpy image - rotate matrix 270 degrees

问题

I've got a Numpy 2d array that represents a grey-scale image and I need to rotate it 270 degrees. Might be being a bit thick here but the two ways I can find to do this seem quite... circulous:

rotated = numpy.rot90(numpy.rot90(numpy.rot90(orignumpyarray)))

rotated = numpy.fliplr(numpy.flipud(numpy.rot90(orignumpyarray)))

I'm thinking there must be a better way to do this in one operation. Basically a rot270() function? Any ideas?

回答1:

You can tell rot90 to rotate several times, this should work:

rotated = numpy.rot90(orignumpyarray,3)

来源：https://stackoverflow.com/questions/2461303/numpy-image-rotate-matrix-270-degrees