Python-Opencv(5)-按座標擷取圖片,水平、豎直拼接圖片
阿新 • • 發佈:2021-01-09
import cv2 import numpy as np ''' 1.按座標擷取圖片 ''' ''' img = cv2.imread("Resources/cards.jpg") #四張牌 4個座標 # pts1 需要擷取圖片的四點座標 pts2 結果圖座標 matrix 儲存pts2的畫素 width,height=250,350 #pts1 = np.float32([[111,219],[287,188],[154,482],[352,440]]) pts1 = np.float32([[127,96],[248,97],[126,260],[247,260]]) pts2=np.float32([[0,0],[width,0],[0,height],[width,height]]) matrix=cv2.getPerspectiveTransform(pts1,pts2) imgoutput=cv2.warpPerspective(img,matrix,(width,height)) cv2.imshow("Image",img) cv2.imshow("Output",imgoutput) cv2.waitKey(0) ''' ''' 2.水平、豎直合併 ''' img = cv2.imread('Resources/1.png') imgHor = np.hstack((img,img)) imgVer = np.vstack((img,img)) cv2.imshow("Horizontal",imgHor) cv2.imshow("Vertical",imgVer) cv2.waitKey(0)