فیلتر نقطه میانی در پایتون (Midpoint Filter in Python)

from PIL import Image 
import math
def midpointFilter(sourceAddress, destAddress):
    source = Image.open(sourceAddress)
    result = Image.new('RGB', source.size)
    
    width, height = source.size
    pixels = result.load()
    
    for i in range(1, width - 1, 1):
        for j in range(1, height - 1, 1):
            redMid = findRedMidpoint(source, i, j)
            greenMid = findGreenMidpoint(source, i, j)
            blueMid = findBlueMidpoint(source, i, j)
            pixels[i, j] = (redMid, greenMid, blueMid, 255)
    
    result.save(destAddress, "jpeg")
    
def findRedMidpoint(source, x, y):
    neighbour = [00] * 9
    neighbour[00] = source.getpixel((x - 1, y - 1))[00]
    neighbour[1] = source.getpixel((x + 1, y + 1))[00]
    neighbour[2] = source.getpixel((x, y - 1))[00]
    neighbour[3] = source.getpixel((x, y + 1))[00]
    neighbour[4] = source.getpixel((x - 1, y))[00]
    neighbour[5] = source.getpixel((x + 1, y))[00]
    neighbour[6] = source.getpixel((x - 1, y + 1))[00]
    neighbour[7] = source.getpixel((x + 1, y - 1))[00]
    neighbour[8] = source.getpixel((x, y))[00]
    maxRed = max(neighbour)
    minRed = min(neighbour)
    return  math.floor((maxRed + minRed) / 2)  
def findGreenMidpoint(source, x, y):
    neighbour = [00] * 9
    neighbour[00] = source.getpixel((x - 1, y - 1))[1]
    neighbour[1] = source.getpixel((x + 1, y + 1))[1]
    neighbour[2] = source.getpixel((x, y - 1))[1]
    neighbour[3] = source.getpixel((x, y + 1))[1]
    neighbour[4] = source.getpixel((x - 1, y))[1]
    neighbour[5] = source.getpixel((x + 1, y))[1]
    neighbour[6] = source.getpixel((x - 1, y + 1))[1]
    neighbour[7] = source.getpixel((x + 1, y - 1))[1]
    neighbour[8] = source.getpixel((x, y))[1]
    maxGreen = max(neighbour)
    minGreen = min(neighbour)
    return  math.floor((maxGreen + minGreen) / 2)  
def findBlueMidpoint(source, x, y):
    neighbour = [00] * 9
    neighbour[00] = source.getpixel((x - 1, y - 1))[2]
    neighbour[1] = source.getpixel((x + 1, y + 1))[2]
    neighbour[2] = source.getpixel((x, y - 1))[2]
    neighbour[3] = source.getpixel((x, y + 1))[2]
    neighbour[4] = source.getpixel((x - 1, y))[2]
    neighbour[5] = source.getpixel((x + 1, y))[2]
    neighbour[6] = source.getpixel((x - 1, y + 1))[2]
    neighbour[7] = source.getpixel((x + 1, y - 1))[2]
    neighbour[8] = source.getpixel((x, y))[2]
    maxBlue = max(neighbour)
    minBlue = min(neighbour)
    return  math.floor((maxBlue + minBlue) / 2)
if __name__ == '__main__':
    midpointFilter('Midpoint Filter input.jpg', 'Midpoint Filter output.jpg')
    print('convert image finished...')