Object tracking method and object tracking apparatus
First Claim
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1. An object tracking method for detecting and tracking a moving object in a picked-up image based on an image signal acquired by an imaging unit, comprising the steps of:
- a) producing a template image cut out from the image acquired from said imaging unit so as to include a part of said object;
b) conducting a template matching by calculating correlations between a present image from said imaging unit and said template image, detecting a position of a part of said present image matched with said template image, and updating a position of a current template image by said detected position;
c) detecting an image changing area between at least two frames of images picked up at different time points by said imaging unit;
d) correcting said detected position of said object to a new position in which said image changing area is detected in a manner different from the detecting of a position of the part of said present image matched with said template image according to said template matching of said step b; and
e) updating a template image by an image output as a new template image based on the updated position of said object, wherein said step b to said step e are repeatedly executed while tracking the object.
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Abstract
An object tracking method and an object tracking apparatus. Based on two or more frames of images acquired at different time points from an imaging unit, an image changing area is detected between the frames. Based on the image changing area thus detected, the position of an object is detected. The detected position of the object is set as a new detected position of the object in place of the present detected position of the object, thereby detecting and tracking an object intruding into a monitor area.
27 Citations
14 Claims
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1. An object tracking method for detecting and tracking a moving object in a picked-up image based on an image signal acquired by an imaging unit, comprising the steps of:
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a) producing a template image cut out from the image acquired from said imaging unit so as to include a part of said object; b) conducting a template matching by calculating correlations between a present image from said imaging unit and said template image, detecting a position of a part of said present image matched with said template image, and updating a position of a current template image by said detected position; c) detecting an image changing area between at least two frames of images picked up at different time points by said imaging unit; d) correcting said detected position of said object to a new position in which said image changing area is detected in a manner different from the detecting of a position of the part of said present image matched with said template image according to said template matching of said step b; and e) updating a template image by an image output as a new template image based on the updated position of said object, wherein said step b to said step e are repeatedly executed while tracking the object. - View Dependent Claims (2, 3, 4, 9, 10, 11)
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5. An object tracking apparatus for detecting and tracking a moving object in a picked-up image based on an image signal acquired by an imaging unit, comprising:
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an image input unit which produces a template image cut out from the image acquired from said imaging unit so as to include a part of said object; and a processing unit which conducts a template matching by calculating correlations between a present image from said image input unit and said template image, detects a position of a part of said present image matched with said template image, and updates a position of a current template image by said detected position, wherein said processing unit further detects an image changing area between at least two frames of images picked up at different time points by said imaging unit, corrects said detected position of said object to a new position in which said image changing area is detected in a manner different from the detection of a position of the part of said present image matched with said template image, and updates a template image by an image output as a new template image based on the updated position of said object, and wherein said processing unit repeatedly executes the template matching, detecting said position of said part, detecting said image changing area, correcting said detected position and updating said template image processings while tracking the object. - View Dependent Claims (6, 7, 8, 12, 13, 14)
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Specification