公开(公告)号：US08781168B2

公开(公告)日：2014-07-15

申请号：US13578143

申请日：2011-02-04

Applicant: Yoann Dhome

Inventor： Yoann Dhome

IPC: G06K9/62

CPC classification number: G01J1/0228 ,  G01J1/44 ,  G06T7/254 ,  G06T2200/28

Abstract: A photometric model includes at least one Gaussian model of a measurable physical magnitude in an image supplied by the camera and it is defined by the mean and the variance of the physical magnitude. A device comprises: means for computing the mean based on the current value of the physical magnitude, these means including a first summer mounted in a closed loop; means for measuring the difference between the mean and the current value of the physical magnitude, these means including a second summer; means for reducing the difference, these means including an automatic regulator. The first summer, the second summer and the automatic regulator are assembled in a closed-loop control of the first summer so as to update the model slowly in a period of stability of the observed scene and rapidly in a period of transition of the observed scene. Application: video surveillance, background subtraction.

Abstract translation: 光度模型包括由相机提供的图像中的可测量的物理大小的至少一个高斯模型，并且由物理量值的平均值和方差来定义。 装置包括：用于基于物理量值的当前值计算平均值的装置，这些装置包括安装在闭环中的第一夏天; 用于测量物理大小的平均值和当前值之间的差异的手段，这些手段包括第二个夏天; 减少差异的手段，这些手段包括一个自动调节器。 第一个夏天，第二个夏天和自动调节器组装在第一个夏天的闭环控制中，以便在观察到的场景的稳定期间慢慢地更新模型，并且在观察场景的转变期间迅速地更新模型 。 应用：视频监控，背景扣除。

公开(公告)号：US20120314906A1

公开(公告)日：2012-12-13

申请号：US13578143

申请日：2011-02-04

Applicant: Yoann Dhome

Inventor： Yoann Dhome

IPC: G06K9/62

CPC classification number: G01J1/0228 ,  G01J1/44 ,  G06T7/254 ,  G06T2200/28

Abstract: A photometric model includes at least one Gaussian model of a measurable physical magnitude in an image supplied by the camera and it is defined by the mean and the variance of the physical magnitude. A device comprises: means for computing the mean based on the current value of the physical magnitude, these means including a first summer mounted in a closed loop; means for measuring the difference between the mean and the current value of the physical magnitude, these means including a second summer; means for reducing the difference, these means including an automatic regulator. The first summer, the second summer and the automatic regulator are assembled in a closed-loop control of the first summer so as to update the model slowly in a period of stability of the observed scene and rapidly in a period of transition of the observed scene. Application: video surveillance, background subtraction.

Abstract translation: 光度模型包括由相机提供的图像中的可测量的物理大小的至少一个高斯模型，并且由物理量值的平均值和方差来定义。 装置包括：用于基于物理量值的当前值计算平均值的装置，这些装置包括安装在闭环中的第一夏天; 用于测量物理大小的平均值和当前值之间的差异的手段，这些手段包括第二个夏天; 减少差异的手段，这些手段包括一个自动调节器。 第一个夏天，第二个夏天和自动调节器组装在第一个夏天的闭环控制中，以便在观察到的场景的稳定期间慢慢地更新模型，并且在观察场景的过渡期间迅速地更新模型 。 应用：视频监控，背景扣除。