OpenCV BackgroundSubtractor 认为繁忙的前景是背景

Question

我正在使用背景减法来识别和控制传送带上的物品。这项工作与高速公路示例中的典型跟踪汽车非常相似。我从一个空的传送带开始，这样计算机一开始就知道背景。但是在传送带上装满包裹一段时间后，计算机开始认为这些包裹是背景。这需要我不时地重新启动程序。有人对此有解决方法吗？由于传送带是黑色的，我想知道时不时地扔进几个空白帧是否有意义，或者是否有其他解决方案。非常感谢


# After experimentation, these values seem to work best.
backSub = cv2.createBackgroundSubtractorMOG2(history = 5000, varThreshold = 1000, detectShadows = False)    

while True:
    return_value, frame = vid.read()
    
    if frame is None:
        print('Video has ended or failed, try a different video format!')
        break        
    
        
    ## [gaussian blur helps to remove noise These settings seem to remove reflections from rollers.] 
    blur = cv2.GaussianBlur(frame, (0,0), 5, 0, 0)
    ## [End of: gaussian blur helps to remove noise These settings seem to remove reflections from rollers.]
    

    ## [Remove the background and produce a grays scale image]
    fgMask = backSub.apply(blur)       
    ## [End of: Remove the background and produce a grey scale image]

Answer 1

你说你最初给背景减法器一些纯背景。

完成后，在“运行”阶段，使用 learningRate = 0 调用 apply()。这样可以确保模型不会更新。

OpenCV BackgroundSubtractor 认为繁忙的前景是背景

OpenCV BackgroundSubtractor Thinks A Busy Foreground Is The Background

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