def add_reflection(im, bgcolor="#00000", amount=0.4, opacity=0.6):
    # convert bgcolor string to rgb value
    background_color = ImageColor.getrgb(bgcolor)

    # copy orignial image and flip the orientation
    reflection = im.copy().transpose(Image.FLIP_TOP_BOTTOM)

    # create a new image filled with the bgcolor the same size
    background = Image.new("RGB", im.size, background_color)

    # calculate our alpha mask
    start = int(255 - (255 * opacity))  # The start of our gradient
    steps = int(255 * amount)  # the number of intermedite values
    increment = (255 - start) / float(steps)
    mask = Image.new('L', (1, 255))
    for y in range(255):
        if y < steps:
            val = int(y * increment + start)
        else:
            val = 255
        mask.putpixel((0, y), val)
    alpha_mask = mask.resize(im.size)

    # merge the reflection onto our background color using the alpha mask
    reflection = Image.composite(background, reflection, alpha_mask)

    # crop the reflection
    reflection_height = int(im.size[1] * amount)
    reflection = reflection.crop((0, 0, im.size[0], reflection_height))

    # create new image sized to hold both the original image and the reflection
    composite = Image.new("RGB", (im.size[0], im.size[1] + reflection_height), background_color)

    # paste the orignal image and the reflection into the composite image
    composite.paste(im, (0, 0))
    composite.paste(reflection, (0, im.size[1]))

    # return the image complete with reflection effect
    return composite
Returns the supplied PIL Image (im) with a reflection effect
dataset/ETHPy150Open jdriscoll/django-photologue/photologue/utils/reflection.py/add_reflection