class BilinImage(Image):
def __getitem__(self, (x, y)):
if isinstance(x, float) and isinstance(y, float):
x0, x1 = int(floor(x)), int(ceil(x))
y0, y1 = int(floor(y)), int(ceil(y))
xoff, yoff = x - x0, y - y0
return (1.0-xoff)*(1.0-yoff) * self[x0, y0] + \
(1.0-xoff)*( yoff) * self[x0, y1] + \
( xoff)*(1.0-yoff) * self[x1, y0] + \
( xoff)*( yoff) * self[x1, y1]
else:
return Image.__getitem__(self, (x, y))
class NNImage(Image):
def __getitem__(self, (x, y)):
return Image.__getitem__(self, (int(x + 0.5), int(y + 0.5)))