公开(公告)号：WO2017062078A3

公开(公告)日：2017-05-26

申请号：PCT/US2016039937

申请日：2016-06-29

Applicant: MASSACHUSETTS INST TECHNOLOGY

Inventor： CHA MIRIAM ,  PHILLIPS RHONDA D ,  WOLFE PATRICK J ,  RICHMOND CHRIST D

IPC: H04N13/02

CPC classification number: G06K9/6212 ,  G06K9/00664 ,  G06K9/6277 ,  G06K2209/051 ,  G06K2209/21

Abstract: Described embodiments detect changes in a scene over time using first and second images of the scene. A non-coherent intensity change detector detects large-scale changes between the first image and the second image and generates a large-scale change value for pairs of corresponding pixel locations in the first and second images. If the large-scale change value for a given pair of pixel locations reaches a threshold, a coherent change detector is used to detect small-scale changes between the first and second images. A small-scale change value is generated for the given pairs of pixel locations in the images. A composite change value is generated by combining the large-scale change value and the small-scale change value for each pixel pair. The change thresholds are used to determine whether a change in the scene has occurred over the time period.

Abstract translation: 所描述的实施例使用场景的第一和第二图像检测场景随时间的变化。 非相干强度变化检测器检测第一图像和第二图像之间的大尺寸变化，并且生成第一和第二图像中的对应像素位置对的大尺寸变化值。 如果给定像素位置对的大规模变化值达到阈值，则使用相干变化检测器来检测第一和第二图像之间的小规模变化。 为图像中给定的像素位置对生成小尺寸变化值。 通过组合每个像素对的大尺寸变化值和小尺寸变化值来生成组合变化值。 更改阈值用于确定在该时间段内是否发生了场景变化。