i found it: the most obscure python incantation. x[...,::-1] swaps RGB/BGR whether x is a single image or an array of images.
`::-1` is Python for "reverse this list" and `..., *` is Numpy for "the last axis". So it's simply "reverse the last axis"
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for me, this represents many layers acquired knowledge: x[i], x[i,j], x[:,j], x[-i], x[:n], x[n:], x[a:b], x[::k], x[::-k], x[...,::-k]. without taking the previous ~8 steps i wouldn't have had any idea what x[...,::-1] meant :)
Thanks. Twitter will use this to make your timeline better. UndoUndo
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