OpenCV运动目标识别

待我称王封你为后i 2023-01-11 09:10 166阅读 0赞

import cv2
    camera = cv2.VideoCapture('anew.flv')
    out_fps =12.0
    fourcc = cv2.VideoWriter_fourcc('M','P','4','2')
    out1 = cv2.VideoWriter('v1.avi',fourcc,out_fps,(500,400))
    out2 = cv2.VideoWriter('v2.avi',fourcc,out_fps,(500,400))
    lastFrame = None
    while camera.isOpened():
        (ret,frame) = camera.read()
        if not ret:
            break
        frame = cv2.resize(frame,(500,400),interpolation = cv2.INTER_CUBIC)
        if lastFrame is None:
            lastFrame = frame
            continue
        frameDelta = cv2.absdiff(lastFrame,frame)
        lastFrame = frame.copy()
        thresh = cv2.cvtColor(frameDelta,cv2.COLOR_BGR2GRAY)
        thresh = cv2.threshold(thresh,25,255,cv2.THRESH_BINARY)[1]
    #findContours因OpenCV版本不同，返回值个数不同了，注意版本
        cnts,hierarchy = cv2.findContours(thresh.copy(),cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
        for c in cnts:
            if cv2.contourArea(c) < 300:
                continue
            (x,y,w,h) = cv2.boundingRect(c)
            cv2.rectangle(frame,(x,y),(x+w,y+h),(0,255,0),2)
        cv2.imshow("frame",frame)
        cv2.imshow("frameDleta",frameDelta)
        cv2.imshow("thresh",thresh)
        out1.write(frame)
        out2.write(frameDelta)
        if cv2.waitKey(20) & 0xFF == ord('q'):
            break
    out1.release()
    out2.release()
    camera.release()
    cv2.destroyAllWindows()

下图为运动视频检测中的截图 电。。v1.avi,vi2.avi生成也正常。代码亲测可用。。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dpbmdneW4_size_16_color_FFFFFF_t_70][]

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