Crop Image By Transparent Spaces

CropImage.py

from PIL import Image, ImageDraw

def checkX(image, x):
    pixels = image.load()
    sum = 0;
    for i in range(image.size[1]):
        if (pixels[x,i][3] == 0):
            sum += 1
    return (sum == image.size[1])

def checkY(image, y):
    pixels = image.load()
    sum = 0;
    for i in range(image.size[0]):
        if (pixels[i,y][3] == 0):
            sum += 1
    return (sum == image.size[0])

image = Image.open('icons02_36-01.png')
x = []
y = []
icon_width = 40

width = image.size[0] 
height = image.size[1] 
pix = image.load()

for i in range(width):
    if (checkX(image,i)):
        x.append(i)

for j in range(height):
    if (checkY(image,j)):
        y.append(j)

count = 0;
print x,y
for i in range(1,len(x)):
    for j in range(1,len(y)):
        if ((1 < x[i]-x[i-1] < icon_width) and (1 < y[j]-y[j-1] < icon_width)):
            print (x[i-1], y[j-1], x[i], y[j])
            croped_image = image.crop((x[i-1], y[j-1], x[i], y[j]))
            croped_pixels = croped_image.load()
            cx = cw = cy = ch = None
            for ci in range(croped_image.size[0]):
                check = checkX(croped_image,ci)
                if (check == False and cx == None):
                    cx = ci
                elif (check == True and cx != None):
                    break
            if (cx == None):
                continue
            cw = ci - cx
            for cj in range(croped_image.size[1]):
                check = checkY(croped_image,cj)
                if (check == False and cy == None):
                    cy = cj
                elif (check == True and cy != None):
                    break
            ch = cj - cy
            
            print (cx,cy,cw,ch,(ci,cj),croped_image.size)
            croped_image.crop((cx,cy,ci+1,cj+1)).save(str(count)+".png")
                
            count+=1