On Saturday, 31 October 2009 23:43:45 UTC+8, Hans Georg Schaathun wrote: > Does anyone know how to save two-tone images represented as > numpy arrays? I handle grayscale images by converting to > PIL Image objects (mode="L") and then use the PIL save method, > but I cannot make this work with mode="1". > > I have tried both boolean arrays and uint8 arrays (mod 2). > In both cases I get an image which is predominantly black, > with thin white stripes (possibly for every 8 pixels). > If, instead, multiply my (mod 2) image by 255, and then > convert with mode="L", I get the expected random-noise-looking > image. > > Does anyone have any ideas? What do I do wrong? What is the > right/best way to save/convert two-tone images? > I have not managed to find proper documentation for the > Image.fromarray() method; the docstring seems to be empty )-: > > TIA > :-- Hans Georg
Possibly because you forget to convert the data type to unit8: " newtemp=np.uint8(TEMP*255) " I have encountered the same problem as you stated. After change the date type to uint8, problem solved. Hope it works. _ST -- https://mail.python.org/mailman/listinfo/python-list
