视觉+opencv+python学习资料

import numpy as np import cv2 as cv # 1 获取视频 cap = cv.VideoCapture('image/DOG.wmv') # 2 指定追踪目标 ret,frame = cap.read() r,h,c,w=197,141,0,208 win = (c,r,w,h) roi = frame[r:r+h,c:c+w] # 3 计算直方图 hsv_roi = cv.cvtColor(roi,cv.COLOR_BGR2HSV) roi_hist = cv.calcHist([hsv_roi],[0],None,[180],[0,180]) cv.normalize(roi_hist,roi_hist,0,255,cv.NORM_MINMAX) # 4 目标追踪 term = (cv.TERM_CRITERIA_EPS|cv.TERM_CRITERIA_COUNT,10,1) while(True): ret,frame = cap.read() if ret ==True: hst = cv.cvtColor(frame,cv.COLOR_BGR2HSV) dst = cv.calcBackProject([hst],[0],roi_hist,[0,180],1) ret,win = cv.meanShift(dst,win,term) x,y,w,h = win img2 = cv.rectangle(frame,(x,y),(x+w,y+h),255,2) cv.imshow("frame",img2) if cv.waitKey(60)&0xFF ==ord('q'): break # 5 释放资源 cap.release() cv.destroyAllWindows()