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1. 发明授权

US5574762A Method and apparatus for directional counting of moving objects 失效
标题翻译：移动物体定向计数的方法和装置
公开(公告)号：US5574762A
公开(公告)日：1996-11-12
申请号：US522196
申请日：1995-08-31
申请人： Atsushi Sato , Megumu Tsuchikawa , Akira Tomono , Kenichiro Ishii
发明人： Atsushi Sato , Megumu Tsuchikawa , Akira Tomono , Kenichiro Ishii
IPC分类号： G06K9/00 , G06T7/20 , G07C9/00 , G06M11/02
CPC分类号： G06K9/00778 , G06T7/2053 , G07C9/00
摘要： A scheme for directional counting of moving objects capable of counting moving objects stably while determining passing directions of the moving objects accurately. In this scheme, a counting line is set in an image field of the sequential images, and a dynamic image formed by pixels forming the counting line is obtained for each frame and while a succesively updated background image is obtained. Then, a subtraction and binarization processing are applied to the dynamic image and the background image to extract a moving object region, and a moving object image is formed by sequentially labeling the moving object region in time order. Then, a number of moving objects passing through a monitoring target location is counted according to the moving object image, while upper and lower direction judgement regions are set above and below the counting line and a passing direction of each moving object is determined by judging one of the upper and lower direction judgement regions in which the moving object is present at a time of a formation start/end time of the moving object image.
摘要翻译：一种能够精确地确定运动物体的通过方向的运动物体稳定计数的运动物体的方向计数方案。在该方案中，在顺序图像的图像场中设置计数线，并且对于每个帧获得由形成计数线的像素形成的动态图像，并且获得连续更新的背景图像。然后，将减法和二值化处理应用于动态图像和背景图像以提取移动对象区域，并且通过以时间顺序顺序地标记移动对象区域来形成移动对象图像。然后，根据移动物体图像计数穿过监视目标位置的多个移动物体，同时将上下方向判断区域设置在计数线的上方和下方，并且通过判断每个移动物体的通过方向来确定在移动物体图像的形成开始/结束时刻的时刻存在移动物体的上下方向判断区域。

2. 发明授权

US5748775A Method and apparatus for moving object extraction based on background subtraction 失效
标题翻译：基于背景减法的移动物体提取的方法和装置
公开(公告)号：US5748775A
公开(公告)日：1998-05-05
申请号：US401972
申请日：1995-03-09
申请人： Megumu Tsuchikawa , Atsushi Sato , Akira Tomono , Kenichiro Ishii
发明人： Megumu Tsuchikawa , Atsushi Sato , Akira Tomono , Kenichiro Ishii
IPC分类号： H04N7/18 , G06K9/00 , G06T1/00 , G06T7/20 , G06T9/00 , G06K9/46
CPC分类号： G06T7/208 , G06K9/00369 , G06K9/00771 , H04N19/20
摘要： A moving object extraction based on background subtraction capable of stably extracting the moving object under various environments. Temporal changes of image feature parameter values for sub-regions subdividing a frame of each input image are stored, and the background image is reconstructed by statistically processing a temporal change of the image feature parameter values for each sub-region within a prescribed target region of the frame over a prescribed period of time to obtain the statistical quantity characterizing that temporal change, judging whether that temporal change is due to an illumination change or not according to the obtained statistical quantity and a prescribed illumination change judging condition, and updating a background image value for each sub-region by a new background image value according to the image feature parameter values for each sub-region during the prescribed period of time. Then, a subtraction processing is applied to one of the input images and the reconstructed background image, and a binarization processing is applied to the obtained subtraction image so as to extract the moving object region from the input images.
摘要翻译：基于背景消除的移动物体提取能够在各种环境下稳定地提取移动物体。存储对每个输入图像的帧进行细分的子区域的图像特征参数值的时间变化，并且通过统计处理在规定的目标区域内的每个子区域的图像特征参数值的时间变化来重构背景图像在规定时间段内获取表示该时间变化的统计量，根据获得的统计量判断该时间变化是否由于照明变化而规定的照明变化判断条件，以及更新背景图像根据在规定时间段内的每个子区域的图像特征参数值，通过新的背景图像值来计算每个子区域的值。然后，将减法处理应用于输入图像和重构背景图像之一，并且将二值化处理应用于所获得的减影图像，以便从输入图像中提取移动对象区域。

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