Drawing polygons in numpy arrays

Question

I\'m trying to draw polygons like this:

In [1]: canvas = numpy.zeros((12, 12), dtype=int)

In [2]: mahotas.polygon.fill_polygon(
   ...: [(1, 1), (1, 10), (1         


        

Answer 1

If the polygons are always rectangles, then we only need two points and:

import numpy
canvas = numpy.zeros((12, 12), dtype=int)
points = [(1, 1), (1, 10), (10, 10), (10, 1)]
start_pt, end_pt = min(points), max(points)
canvas[start_pt[1]:end_pt[1]+1, start_pt[0]:end_pt[0]+1] = 1