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python Programming Glossary: iaPIL merge of two images with alpha channels - not working as expected http://stackoverflow.com/questions/13750447/pil-merge-of-two-images-with-alpha-channels-not-working-as-expected library share improve this question From your initial description the following idea seems to be equivalent. Let.. '2.png' wmark Image.open watermark img Image.open image ia wa None None if len img.getbands 4 ir ig ib ia img.split img.. image ia wa None None if len img.getbands 4 ir ig ib ia img.split img Image.merge 'RGB' ir ig ib if len wmark.getbands..
Fast tensor rotation with NumPy http://stackoverflow.com/questions/4962606/fast-tensor-rotation-with-numpy of the rotated tensor T' are given by T' ijkl &Sigma g ia g jb g kc g ld T abcd with the sum being over the repeated indices..
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