Moving object detection device

A moving object detection device which detects a moving object from a video, the moving object detection device comprising:

• a window setting unit configured to set a window having a predetermined volume in the video that is a three-dimensional image in which two-dimensional images are arranged in a temporal axis direction;
• an orientation of spatial intensity gradient calculation unit configured to calculate, for each pixel included in the window, an orientation of spatial intensity gradient that is an orientation of spatial gradient of intensity;
• a spatial histogram calculation unit configured to calculate a spatial histogram that is a histogram of the orientation of spatial intensity gradient within the window;
• an orientation of temporal intensity gradient calculation unit configured to calculate, for each pixel included in the window, an orientation of temporal intensity gradient that is an orientation of temporal gradient of intensity;
• a temporal histogram calculation unit configured to calculate a temporal histogram that is a histogram of the orientation of temporal intensity gradient within the window;
• and
• a determination unit configured to determine whether or not the moving object is included within the window, based on the spatial histogram calculated by the spatial histogram calculation unit and the temporal histogram calculated by the temporal histogram calculation unit.

A method for detecting a moving object from a video, comprising:

• setting a window having a predetermined volume in the video that is a three-dimensional video in which two-dimensional images are arranged in a temporal axis direction;
• calculating, for each pixel included in the window, an orientation of spatial intensity gradient that is an orientation of spatial gradient of intensity;
• calculating a spatial histogram that is a histogram of the orientation of spatial intensity gradient within the window;
• calculating, for each pixel included in the window, an orientation of temporal intensity gradient that is an orientation of temporal gradient of intensity;
• calculating a temporal histogram that is a histogram of the orientation of temporal intensity gradient within the window;
• and
• determining whether or not the moving object is included within the window, based on the spatial histogram calculated in the calculating of the spatial histogram and the temporal histogram calculated in the calculating of the temporal histogram.

A non-transitory computer-readable recording medium having a program for detecting a moving object from a video recorded thereon, the program causing a computer to execute:

• setting a window having a predetermined volume in the video that is a three-dimensional video in which two-dimensional images are arranged in a temporal axis direction;
• calculating, for each pixel included in the window, an orientation of spatial intensity gradient that is an orientation of spatial gradient of intensity;
• calculating a spatial histogram that is a histogram of the orientation of spatial intensity gradient within the window;
• calculating, for each pixel included in the window, an orientation of temporal intensity gradient that is an orientation of temporal gradient of intensity;
• calculating a temporal histogram that is a histogram of the orientation of temporal intensity gradient within the window;
• and
• determining whether or not the moving object is included within the window, based on the spatial histogram calculated in the calculating of the spatial histogram and the temporal histogram calculated in the calculating of the temporal histogram.

An integrated circuit which detects a moving object from a video, comprising:

• a window setting unit configured to set a window having a predetermined volume in the video that is a three-dimensional video in which two-dimensional images are arranged in a temporal axis direction;
• an orientation of spatial intensity gradient calculation unit configured to calculate, for each pixel included in the window, an orientation of spatial intensity gradient that is an orientation of spatial gradient of intensity;
• a spatial histogram calculation unit configured to calculate a spatial histogram that is a histogram of the orientation of spatial intensity gradient within the window;
• an orientation of temporal intensity gradient calculation unit configured to calculate, for each pixel included in the window, an orientation of temporal intensity gradient that is an orientation of temporal gradient of intensity;
• a temporal histogram calculation unit configured to calculate a temporal histogram that is a histogram of the orientation of temporal intensity gradient within the window;
• and
• a determination unit configured to determine whether or not the moving object is included within the window, based on the spatial histogram calculated by the spatial histogram calculation unit and the temporal histogram calculated by the temporal histogram calculation unit.