Color Issues When Creating ImageStim

Coding
1

Hello!
I am working on a function that can take an image, shuffle the pixels, and create a new image. It’s mostly good, but for some reason the color is a bit off. These images are just black/white, but when I shuffle the pixels and stitch them back together, the images become either black/grey or grey/white. Would anyone have any suggestions? Code is below.

# image to pixels

im = Image.open('im1.png')

im.convert('L')

pixels = np.array(im, dtype = np.uint8)

# splitting pixels into groups

split_pixels = np.array_split(pixels, 15)

# shuffling pixel groups

shuffled_pixels = random.sample(split_pixels, k = len(split_pixels))

# stitching groups back together

stitched_pixels = np.concatenate(shuffled_pixels)

print(stitched_pixels)

# pixels to image

newIm = visual.ImageStim(win, image = stitched_pixels, colorSpace = 'LMS', size = (6, 6), interpolate = False)

newIm.draw(); win.flip()

Thank you!