线段绘制

import cv2import numpy as npnewImageInfo = (500,500,3)dst = np.zeros(newImageInfo,np.uint8)# line# 绘制线段 1 dst 2 begin 3 end 4 colorcv2.line(dst,(100,100),(400,400),(0,0,255))# 5 line wcv2.line(dst,(100,200),(400,200),(0,255,255),20)# 6 line typecv2.line(dst,(100,300),(400,300),(0,255,0),20,cv2.LINE_AA)cv2.line(dst,(200,150),(50,250),(25,100,255))cv2.line(dst,(50,250),(400,380),(25,100,255))cv2.line(dst,(400,380),(200,150),(25,100,255))cv2.imshow('dst',dst)cv2.waitKey(0)

矩形圆形绘制

import cv2import numpy as npnewImageInfo = (500,500,3)dst = np.zeros(newImageInfo,np.uint8)# 1 2 左上角 3 右下角 4 5 fill -1 >0 line wcv2.rectangle(dst,(50,100),(200,300),(255,0,0),5)# 2 center 3 r cv2.circle(dst,(250,250),(50),(0,255,0),2)# 2 center 3 轴 4 angle 5 begin 6 end 7 cv2.ellipse(dst,(256,256),(150,100),0,0,180,(255,255,0),-1)points = np.array([[150,50],[140,140],[200,170],[250,250],[150,50]],np.int32)print(points.shape)points = points.reshape((-1,1,2))print(points.shape)cv2.polylines(dst,[points],True,(0,255,255))cv2.imshow('dst',dst)cv2.waitKey(0)

文字图片绘制

import cv2 import numpy as npimg = cv2.imread('image0.jpg',1)font = cv2.FONT_HERSHEY_SIMPLEXcv2.rectangle(img,(200,100),(500,400),(0,255,0),3)# 1 dst 2 文字内容 3 坐标 4 5 字体大小 6 color 7 粗细 8 line typecv2.putText(img,'this is flow',(100,300),font,1,(200,100,255),2,cv2.LINE_AA)cv2.imshow('src',img)cv2.waitKey(0)

import cv2 img = cv2.imread('image0.jpg',1)height = int(img.shape[0]*0.2)width = int(img.shape[1]*0.2)imgResize = cv2.resize(img,(width,height))for i in range(0,height):for j in range(0,width):img[i+200,j+350] = imgResize[i,j]cv2.imshow('src',img)cv2.waitKey(0)