Tiler tools boundary clean up / An alternate to PIL Mogrify

BoundaryCleanup.py

import sys
from PIL import Image

imageFullPath = sys.argv[1]

rasterImage = Image.open(imageFullPath)
width,height = rasterImage.size
 
rasterImage = rasterImage.convert('RGBA')
pix = rasterImage.load()
 
for i in range(0, width):
    for j in range(0, height):        
        if(pix[i,j][0] == 0):             
            pix[i,j] = (255,255,255,0)
         
rasterImage.save(imageFullPath,'PNG')
        
# run BoundaryCleanup.py fileName