﻿ python – 使用PIL复制三角形图像区域 - 代码日志

#### python – 使用PIL复制三角形图像区域

``````image1:
100x100 pixels
points = [(10,10), (20,20), (10,20)]

image2:
250x250 pixels
points = [(35,30), (75,19), (50,90)]
``````

``````import Image
import ImageDraw
import numpy

def transformblit(src_tri, dst_tri, src_img, dst_img):
((x11,x12), (x21,x22), (x31,x32)) = src_tri
((y11,y12), (y21,y22), (y31,y32)) = dst_tri

M = numpy.array([
[y11, y12, 1, 0, 0, 0],
[y21, y22, 1, 0, 0, 0],
[y31, y32, 1, 0, 0, 0],
[0, 0, 0, y11, y12, 1],
[0, 0, 0, y21, y22, 1],
[0, 0, 0, y31, y32, 1]
])

y = numpy.array([x11, x21, x31, x12, x22, x32])

A = numpy.linalg.solve(M, y)

src_copy = src_img.copy()
srcdraw = ImageDraw.Draw(src_copy)
srcdraw.polygon(src_tri)
src_copy.show()
transformed = src_img.transform(dst_img.size, Image.AFFINE, A)

dstdraw = ImageDraw.Draw(dst_img)
dstdraw.polygon(dst_tri, fill=(255,255,255))
dst_img.show()
dst_img.show()

im100 = Image.open('test100.jpg')
im250 = Image.open('test250.jpg')

tri1 = [(10,10), (20,20), (10,20)]
tri2 = [(35,30), (75,19), (50,90)]

transformblit(tri1, tri2, im100, im250)
``````