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 -- http://mail.python.org/mailman/listinfo/python-list
