官方文档:The function fillConvexPoly draws a filled convex polygon. This function is much faster than the function fillPoly . It can fill not only convex polygons but any monotonic polygon without self-intersections, that is, a polygon whose contour intersects every horizontal line (scan line) twice at the most (though, its top-most and/or the bottom edge could be horizontal).
使用方法:
import cv2
import numpy
a = numpy.zeros((10,10))
triangle = numpy.array([ [1,3], [4,8], [1,9] ], numpy.int32)#[1,3],[4,8],[1,9]为要填充的轮廓坐标,形如[[X1,Y2],[X2,Y2]]
cv2.fillConvexPoly(a, triangle, 1)
官方文档:The function fillPoly fills an area bounded by several polygonal contours. The function can fill complex areas, for example, areas with holes, contours with self-intersections (some of their parts), and so forth.
使用方法:
cv2.fillPoly(a, [triangle], 1)
注意:cv2.fillPoly使用的是[triangle],而cv2.fillConvexPoly使用的是triangle
如果有多个形状:
cv2.fillPoly(a, [triangle, square, hexagon], 1)