image = Image.open(file) # file is 1-bit jpg
image = image.convert('P') # image become 8-bit
colors = [0, 0, 0, 128, 0, 0, 0, 128, 0, 128, 128, 0, 0, 0, 128]
image.putpalette(colors) # why use this code image become 4-bit ?
image.save("1.png",format='PNG') # save image become 4-bit png ????? (-w-)?
i need a 8-bit color png ,can you help me?