#!/usr/bin/env python
# -*- coding: utf-8 -*-

import cv2
import numpy as np

# 白色背景
img = np.ones((200,200,3), np.uint8)*255
# 绘制一条线宽为5的红色线段
cv2.line(img,(1,1),(198,198),(0,0,255),5)
# 绘制黑色边框
cv2.rectangle(img,(1,1),(198,198),(0,0,0),2)
# 绘制红色圆
cv2.circle(img,(75,75), 40, (0,0,255), -1)
# 绘制蓝色部分椭圆
cv2.ellipse(img,(125,125),(40,20),0,0,180,(255,0,0),-1)
#绘制紫色多边形
pts = np.array([[20,20],[175,20],[175,175],[20,140]], np.int32)
pts = pts.reshape((-1,1,2))
cv2.polylines(img,[pts],True,(255,0,255),2)

cv2.imshow("img",img)
cv2.waitKey(0)
cv2.destroyAllWindows()



# 为了输出图片
import sys
sys.path.append('..\\utils') 
import utils
utils.show_img([img],"fig4-1")