It seemed that the box of Draw.rectangle contained the end xy point #1668
Description
I learned this from doc:
xy – Four points to define the bounding box. Sequence of either [(x0, y0), (x1, y1)] or [x0, y0, x1, y1]. The second point is just outside the drawn rectangle.
Then I ran this script
from PIL import Image, ImageDraw
bb=Image.new('RGB',(4,4),(255,255,255))
dr=ImageDraw.Draw(bb)
box=(0,0,2,2)
dr.rectangle(box, fill=(125,45,55))
for i in range(4):
for j in range(4):
print(i,j,bb.getpixel((i,j)))
cc=bb.crop(box)
print(bb.getcolors())
print(cc.getcolors())The output was
0 0 (125, 45, 55)
0 1 (125, 45, 55)
0 2 (125, 45, 55)
0 3 (255, 255, 255)
1 0 (125, 45, 55)
1 1 (125, 45, 55)
1 2 (125, 45, 55)
1 3 (255, 255, 255)
2 0 (125, 45, 55)
2 1 (125, 45, 55)
2 2 (125, 45, 55)
2 3 (255, 255, 255)
3 0 (255, 255, 255)
3 1 (255, 255, 255)
3 2 (255, 255, 255)
3 3 (255, 255, 255)
[(7, (255, 255, 255)), (9, (125, 45, 55))]
[(4, (125, 45, 55))]It drew 9 points, while I just wanted the first 4 points to be filled