plant99 commented on issue #2853: Invalid dimensions error when showing gray image in rec file URL: https://github.com/apache/incubator-mxnet/issues/2853#issuecomment-430901720 The input of `imshow` can only be a `2D` input - grayscale or a 3D where the last dimension can have 3 ( `RGB` ) or 4 ( `RGBA` ) A good idea is to reshape the (x, y, 1) array to (x, y)
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