Complete this program with a sharpen function that sharpens the edge of an image while keeping its original colors: from images import Image def main(): filename = input("Enter the image file name: ") image = Image(filename) newimage = sharpen(image, 20, 15) newimage.draw() if __name__ == "__main__": main()

def sharpen(original, width, height):
    blank = Image.blank(original.width, original.height)
    for y in range(height, original.height - height):
        for x in range(width, original.width - width):
            pixel = original.get_pixel(x, y)
            blank.set_pixel(x, y, pixel)

    # Find pixel, pixel to the left, and pixel above
    for y in range(height, original.height - height):
        for x in range(width, original.width - width):
            pixel = original.get_pixel(x, y)
            left = original.get_pixel(x-1, y)
            above = original.get_pixel(x, y-1)

            # Compute the sharpened color
            red = weighted_average(pixel.red, left.red, above.red)
            green = weighted_average(pixel.green, left.green, above.green)
            blue = weighted_average(pixel.blue, left.blue, above.blue)
            newpixel = Pixel