Moving object detection apparatus
First Claim
1. A method for monitoring a moving object, comprising the steps of:
- setting a window area of interest for an inputted time-varying image;
calculating a correlation between a first data of the window area in a frame (A) and a second data of the window area in a frame (B); and
deciding a first interval in which a moving object is present in the window area, based on a pattern of a calculated correlation value over a predetermined time period.
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Abstract
A moving object is detected from a movie. The actual movie has a complicated background. In order to detect the moving object, the invention is constructed to comprise, in addition to means 500 for inputting the movie, and display 300 for outputting the processed result: means 700 for judging the interval which is predicted to belong to the background as to a pixel region in the movie; means 800 for extracting the moving object; and means 900 for calculating the moving direction and velocity of the moving object.
Thanks to the above-specified construction, even under the complicated background in which not only the change in the illumination condition but also the structure change will occur, the presence of the structure change of the background can be judged to detect/extract the moving object on real time. Moreover, the moving direction and velocity of the moving object can also be calculated.
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Citations
20 Claims
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1. A method for monitoring a moving object, comprising the steps of:
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setting a window area of interest for an inputted time-varying image;
calculating a correlation between a first data of the window area in a frame (A) and a second data of the window area in a frame (B); and
deciding a first interval in which a moving object is present in the window area, based on a pattern of a calculated correlation value over a predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for monitoring a moving object, comprising the steps of:
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setting a window area of interest for an inputted time-varying image;
calculating a correlation between a reference data of the window area in a reference frame and a current data of the window area in a current frame;
deciding whether images of the window area of the current frame includes an image of a moving object correlation value over a predetermined time period; and
updating the reference data as the current data when the image of the window area of the current frame does not include the image of the moving object. - View Dependent Claims (8, 9)
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10. A method for monitoring a moving object, comprising the steps of:
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setting a window area of interest for an inputted time-varying image;
calculating a correlation between a reference data of the window area in a reference frame and a current data of the window area in a current frame;
deciding whether images of the window area in the current frame is a background image which is a reference image for detecting a moving object, based on a plurality of calculated correlation values; and
updating the reference data as the current data when the image of the window area in the current frame is a background image. - View Dependent Claims (11, 13, 15, 17)
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12. A method for monitoring a moving object, comprising the steps of:
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setting a window area of interest for an inputted time-varying image;
calculating a correlation between a first data of the window area in a frame (A) and a second data of the window area in a frame (B); and
deciding an interval in which an image of the window area changes temporarily, based on a plurality of calculated correlation values.
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14. A monitoring system, comprising:
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a TV camera for taking in time-varying images;
a computer for monitoring the time-varying images; and
a display for displaying the result of the monitoring;
wherein said computer calculates a correlation between a first data of a window area in a frame (A) and a second data of the window area in a frame (B) and decides a interval in which a moving object is present in the window area based on a pattern of a calculated correlation value over a predetermined time period; and
wherein said display displays a representative screen of the time-varying images in the first interval.
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16. A monitoring system, comprising:
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a TV camera for taking in time-varying images;
a computer for monitoring the time-varying images; and
a display for displaying the result of monitoring;
wherein said computer calculates a correlation between a reference data and a current data of the window area in a current frame and decides whether an image of the window area of the current frame includes an image of a moving object or not based on a pattern of a calculated correlation value over a predetermined time period.
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18. A monitoring system, comprising:
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a TV camera for taking in time-varying images;
a computer for monitoring the time-varying images; and
a display for displaying the result of monitoring;
wherein said computer calculates a correlation between a first data of a window area in a frame (A) and a second data of the window area in a frame (B) and decides an interval in which an image of the window area changes temporarily, based on a plurality of calculated correlation value.
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19. A monitoring system, comprising:
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means for taking in time-varying images;
means for setting a window area of interest for the time-varying images;
means for calculating a correlation between a first data of the window area in a frame (A) and a second data of the window area in a frame (B); and
means for deciding a first interval in which a moving object is present in the window area, based on a pattern of a calculated correlation value over a predetermined time period.
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20. A monitoring system, comprising:
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means for taking in time-varying images;
means for setting a window area of interest for the time-varying images;
means for calculating a correlation between a first data of the window area in a frame (A) and a second data of the window area in a frame (B); and
means for deciding an interval in which an image of the window area changes temporarily, based on a plurality of a calculated correlation value.
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Specification