Device for detecting the existence of moving bodies in an image
First Claim
1. An image processing device for measuring traffic flows which comprises:
- means for taking an image;
a frame memory for storing a plurality of image data elements that define the image;
means for selecting a set of image data elements from the plurality of image data elements, the selected set of image data elements being indicative of a portion of the image within an existence domain, the existence domain defining an intended vehicle path in the image;
means for selecting vehicle data representing potential vehicles front the set of image data elements, the vehicle data defining line edges;
means for generating information that defines one of a center of gravity value and a width based upon the vehicle data defining the line edges, and preserving the information;
means for selecting projection data from the vehicle data based on the information from the means for generating and preserving;
means for timewisely accumulating the projection data selected by the means for selecting the projection data;
means for determining the existence of a vehicle moving in the portion of the image within the existence domain based on the timewisely accumulated projection data; and
a state quantities measuring device for measuring state quantities of the vehicle determined by the means for determining.
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Abstract
A moving body measuring device, having an image taking unit for taking an image of a moving body, a controllers for controlling the image taking unit and a frame memory for memorizing an image data of the image of the image taking unit, which processes the image data, detects the moving body and obtains an information of the moving body which comprises an existence domain setting circuits for previously setting an existence domain of the moving body extended along a moving path of the moving body based on the image data, a sampling circuits for sampling a data showing the moving body based on the image data in the existence domain, and a timewise data accumulating circuits for timewisely and continuously accumulating at every constant period, the data showing the moving body sampled by the sampling circuits which detects a timewise change of the moving body moving in the previously set existence domain.
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Citations
19 Claims
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1. An image processing device for measuring traffic flows which comprises:
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means for taking an image; a frame memory for storing a plurality of image data elements that define the image; means for selecting a set of image data elements from the plurality of image data elements, the selected set of image data elements being indicative of a portion of the image within an existence domain, the existence domain defining an intended vehicle path in the image; means for selecting vehicle data representing potential vehicles front the set of image data elements, the vehicle data defining line edges; means for generating information that defines one of a center of gravity value and a width based upon the vehicle data defining the line edges, and preserving the information; means for selecting projection data from the vehicle data based on the information from the means for generating and preserving; means for timewisely accumulating the projection data selected by the means for selecting the projection data; means for determining the existence of a vehicle moving in the portion of the image within the existence domain based on the timewisely accumulated projection data; and a state quantities measuring device for measuring state quantities of the vehicle determined by the means for determining. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for detecting an existence of a moving vehicle in an image, comprising:
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a storage device that receives and stores a set of image data elements defining the image; a vehicle data detecting circuit coupled to the storage device, that provides vehicle data representing potential vehicles in the image based on the set of image data elements, the vehicle data defining a set of edges; an information generating circuit coupled to the vehicle data detecting circuit, that generates information that defines one of a center of gravity value and a width based on the vehicle data defining the set of edges; a projection circuit coupled to the information generating circuit, that provides a set of projection data elements from the vehicle data according to the information; an accumulating circuit that, over time, accumulates a plurality of sets of projection data elements provided by the projection circuit; and determining circuitry coupled to the projection circuit, that determines the existence of a moving vehicle in the image according to the plurality of sets of projection data elements. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method for detecting an existence of a moving vehicle in an image, comprising the steps of:
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receiving a set of image data elements defining the image; generating vehicle data representing potential vehicles in the image based on the set of image data elements, the vehicle data defining a set of edges; generating information that defines one of a center of gravity value and a width based on the generated vehicle data defining the set of edges; forming a set of projection data elements from the generated vehicle data according to the generated information; accumulating, over time, a plurality of sets of projection data elements; and determining the existence of a moving vehicle in the image according to the plurality of sets of projection data elements. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification