US5134472A
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Moving object detection apparatus and method
Assignee: Toshiba Corp
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Filing: 1990-02-07
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Granted: 1992-07-28
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Expires: 2010-02-07
Abstract
Abstract A moving object detecting apparatus is disclosed and includes a TV camera for generating an image signal in accordance with a scene including a moving object and a fixed object. A CPU takes the difference, between the image signals generated by the TV camera at different times to generate a subtracted image signal. CPU then sets a pointing window over the subtracted image corresponding to the subtracted image signal which includes an image corresponding to the moving object. A CPU analyzes signals generated by the TV camera, within the pointing window, and detects an image area corresponding to the moving object.
Inventors
- 👤 Shozo Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:58
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/18; H04N7/188
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
125 words
An apparatus for detecting a moving image corresponding to a moving object within a fixed field of view of a monitoring device, the apparatus comprising: input means for generating signals corresponding to a scene, corresponding to said fixed field of view, and including the moving object, at first and second times; subtraction means for subtracting the signal generated by said input means at said first time from the signal generated by said input means at said second time to generate a subtracted image signal; localization means for setting an image area covering a portion of said subtracted image signal; and detection means for detecting movement of said moving object based on the subtracted image signal only in the image area set by said localization means.
Claim 2
Independent Claim
125 words
An apparatus for detecting a moving image corresponding to a moving object within a fixed field of view of a monitoring device, the apparatus comprising: input means for generating signals corresponding to a scene, corresponding to said fixed field of view, and including the moving object, at first and second times; subtraction means for subtracting the signal generated by said input means at said first time from the signal generated by said input means at said second time to generate a subtracted image signal; localization means for setting an image area covering a portion of said subtracted image signal; and detection means for detecting movement of said moving object based on the subtracted image signal only in the image area set by said localization means.
Claim 3
Dependent Claim
57 words
The apparatus of claim 1, wherein said input means comprises line input means for generating multilevel signals along each scanning line; said detection means comprising comparing means for comparing the multilevel signals with a threshold; and further comprising means for generating a detection signal in response to a result of the comparison made by said comparing means.
Claim 4
Dependent Claim
18 words
The apparatus of claim 1, wherein said localization means sets the image area to cover the moving image.
Claim 5
Dependent Claim
14 words
The apparatus of claim 1, wherein the dimension of the image area is fixed.
Claim 6
Dependent Claim
27 words
The apparatus of claim 2, wherein said comparing means compares the multilevel signals with one threshold selected from a plurality of thresholds corresponding to a particular line.
Claim 7
Independent Claim
147 words
An apparatus for detecting a moving image corresponding to a moving object within the field of view of a monitoring device, the apparatus comprising: input means for generating signals corresponding to a scene, including the moving object, at first and second times; correction means for correcting the signals in accordance with the distance between the moving object and said input means; subtraction means for subtracting the signal generated by said input means at said first time and corrected by said correction means from the signal generated by said input means at said second time and corrected by said correction means to generate a subtracted image signal; localization means for setting an image area covering at least a portion of said subtracted image signal; detection means for detecting movement of said moving object based on the subtracted image signal in the image area set by said localization means.
Claim 8
Independent Claim
147 words
An apparatus for detecting a moving image corresponding to a moving object within the field of view of a monitoring device, the apparatus comprising: input means for generating signals corresponding to a scene, including the moving object, at first and second times; correction means for correcting the signals in accordance with the distance between the moving object and said input means; subtraction means for subtracting the signal generated by said input means at said first time and corrected by said correction means from the signal generated by said input means at said second time and corrected by said correction means to generate a subtracted image signal; localization means for setting an image area covering at least a portion of said subtracted image signal; detection means for detecting movement of said moving object based on the subtracted image signal in the image area set by said localization means.
Claim 9
Dependent Claim
39 words
The apparatus of claim 6, further comprising: means for generating at least two position signals corresponding to at least two positions of the moving object; means for calculating a correcting coefficient based on said at least two position signals.
Claim 10
Independent Claim
97 words
An apparatus for detecting a moving image corresponding to a moving object, the apparatus comprising: input means for generating signals corresponding to a scene including the moving object, at first and second times; subtraction means for subtracting the signals generated by said input means at the first time from the signals generated by said input means at the second time to generate a subtracted image signal; boundary detection means for generating an edge signal corresponding to a boundary between the object and its background; and neglection means for deleting the edge signal from the subtracted image signal.
Claim 11
Independent Claim
97 words
An apparatus for detecting a moving image corresponding to a moving object, the apparatus comprising: input means for generating signals corresponding to a scene including the moving object, at first and second times; subtraction means for subtracting the signals generated by said input means at the first time from the signals generated by said input means at the second time to generate a subtracted image signal; boundary detection means for generating an edge signal corresponding to a boundary between the object and its background; and neglection means for deleting the edge signal from the subtracted image signal.
Claim 12
Dependent Claim
84 words
The apparatus of claim 8, further comprising: evaluation means for comparing the subtracted image signal with the edge signal; generating means for generating an image signal if the substracted image signal corresponds to an image signal and the edge signal corresponds to a non-image signal at the same position; and selection means for selecting one signal from each of said neglection means and said generating mean; wherein said moving object is detected based on said signal from said neglection means and said generating means.
Claim 13
Dependent Claim
28 words
The apparatus of claim 8, wherein said neglection means deletes the edge signal and neighborhood signals corresponding to the neighborhood of the boundary from the subtracted image signals.
Claim 14
Dependent Claim
94 words
The apparatus of claim 8, further comprising: division means for dividing the signals generated by said input means into a plurality of groups of signals; evaluation means for comparing the subtracted image signal with the edge signal within each group of signals; logic means for performing a arithmetic logic operation between the subtracted image signal and the edge signal; and selection means for selecting one signal from each of said neglection means and said logic means; wherein said moving object is detected based on said signals from said neglection means and said logic means.
Claim 15
Independent Claim
112 words
A method for detecting a moving image corresponding to a moving device within a fixed field of view of a monitoring device, comprising the steps: generating signals corresponding to a scene corresponding to said fixed field of view, and including the moving object, at first and second times; subtracting the signal generated by said generating step at the first time from the signal generated by said generating step at the second time to generate a subtracted image signal; setting an image area covering a portion of the subtracted image signal; detecting movement of the moving object based on the subtracted image signal only in the image area set by said setting step.
Claim 16
Independent Claim
112 words
A method for detecting a moving image corresponding to a moving device within a fixed field of view of a monitoring device, comprising the steps: generating signals corresponding to a scene corresponding to said fixed field of view, and including the moving object, at first and second times; subtracting the signal generated by said generating step at the first time from the signal generated by said generating step at the second time to generate a subtracted image signal; setting an image area covering a portion of the subtracted image signal; detecting movement of the moving object based on the subtracted image signal only in the image area set by said setting step.
Claim 17
Dependent Claim
57 words
The method of claim 12, wherein said generating step comprises the step of generating multilevel signals along each scanning line; said detecting step comprises the step of comparing the multi-level signals with a threshold; and further comprising the step of generating a detection signal in response to a result of the comparison made by said comparing step.
Claim 18
Dependent Claim
14 words
The step of claim 12, wherein the dimension of the image area is fixed.
Claim 19
Dependent Claim
31 words
The step of claim 13, wherein said comparing step includes the step of comparing the multi-level signals with one threshold selected from a plurality of thresholds corresponding to a particular line.
Claim 20
Independent Claim
133 words
A method of detecting a moving image corresponding to a moving object within the field of view of a monitoring device, comprising the steps: generating signals corresponding to a scene, including the moving object, at first and second times; correcting the signals in accordance with the distance between the moving object and said monitoring device; subtracting the signal generated by said generating step at the first time and corrected by said correcting step from the signal generated by said generating step at the second time and corrected by said correcting step to generate a subtracted image signal; setting an image area covering at least a portion of the subtracted image signal; and detecting movement of the moving object based on the subtracted image signal in the image area set by said setting step.
Claim 21
Independent Claim
133 words
A method of detecting a moving image corresponding to a moving object within the field of view of a monitoring device, comprising the steps: generating signals corresponding to a scene, including the moving object, at first and second times; correcting the signals in accordance with the distance between the moving object and said monitoring device; subtracting the signal generated by said generating step at the first time and corrected by said correcting step from the signal generated by said generating step at the second time and corrected by said correcting step to generate a subtracted image signal; setting an image area covering at least a portion of the subtracted image signal; and detecting movement of the moving object based on the subtracted image signal in the image area set by said setting step.
Claim 22
Dependent Claim
38 words
The method of claim 16, further comprising the steps of: generating at least two position signals corresponding to at least two positions of the moving object; and calculating a correcting coefficient based on at least two positions data.
Claim 23
Independent Claim
108 words
A method for detecting a moving image corresponding to a moving object, the method comprising the steps of: generating a signal corresponding to a scene, including the moving object, at first and second times; subtracting the signals generated by said generating step at the first time from the signals generated by the generating step at the second time to generate a subtracted image signal; generating an edge signal corresponding to a boundary between an object including the moving object and a background; deleting the edge signal from the subtracted image signal; and detecting movement of the object based on the subtracted image signal deleted by said deleting step.
Claim 24
Independent Claim
108 words
A method for detecting a moving image corresponding to a moving object, the method comprising the steps of: generating a signal corresponding to a scene, including the moving object, at first and second times; subtracting the signals generated by said generating step at the first time from the signals generated by the generating step at the second time to generate a subtracted image signal; generating an edge signal corresponding to a boundary between an object including the moving object and a background; deleting the edge signal from the subtracted image signal; and detecting movement of the object based on the subtracted image signal deleted by said deleting step.
Claim 25
Dependent Claim
75 words
The method of claim 18, further comprising the steps of: comparing the subtracted image signal with the edge signal; generating an image signal if the subtracted image signal and the edge signal corresponds to a non-image signal at the same position; and selecting one signal from each of said deleting step and said generating step; wherein said moving object in detected based on the signal from said deleting step and/or said image signal generating step.
Claim 26
Dependent Claim
32 words
The method of claim 18, wherein said deleting step comprises the step of deleting the edge signal and neighborhood signals corresponding to the neighborhood of the boundary from the subtracted image signals.
Claim 27
Independent Claim
131 words
An apparatus for detecting a moving image corresponding to a moving object within the field of view of a monitoring device, the apparatus comprising: input means for generating signals corresponding to a scene, including the moving object, at first and second times; correction means for correcting the signals in accordance with the distance between the moving object and said input means; subtraction means for subtracting the signal generated by said input means at said first time and corrected by said correction means from the signal generated by said input means at said second time and corrected by said correction means to generate a subtracted image signal; and detection means for detecting movement of said moving object in an image area within said field of view, based on the subtracted image signal.
Claim 28
Independent Claim
131 words
An apparatus for detecting a moving image corresponding to a moving object within the field of view of a monitoring device, the apparatus comprising: input means for generating signals corresponding to a scene, including the moving object, at first and second times; correction means for correcting the signals in accordance with the distance between the moving object and said input means; subtraction means for subtracting the signal generated by said input means at said first time and corrected by said correction means from the signal generated by said input means at said second time and corrected by said correction means to generate a subtracted image signal; and detection means for detecting movement of said moving object in an image area within said field of view, based on the subtracted image signal.
Claim 29
Dependent Claim
58 words
The apparatus of claim 21, wherein said input means comprises line input means for generating multilevel signals along each of a plurality of scanning lines, and said detection means comprising comparing means for comparing the multilevel signals with a threshold and generating means for generating a detection signal in response to the comparison made by said comparing means.
Claim 30
Dependent Claim
19 words
The apparatus of claim 21, further including localization means for setting the image area to cover the moving image.
Claim 31
Dependent Claim
14 words
The apparatus of claim 21, wherein the dimension of the image area is fixed.
Claim 32
Dependent Claim
28 words
The apparatus of claim 22, wherein said comparing means compares the multilevel signals with one threshold selected from a plurality of thresholds, each corresponding to a particular line.
Claim 33
Independent Claim
119 words
A method of detecting a moving image corresponding to a moving object within the field of view of a monitoring device, comprising the steps: generating signals corresponding to a scene, including the moving object, at first and second times; correcting the signals in accordance with the distance between the moving object and said monitoring device; subtracting the signal generated by said generating step at said first time and corrected by said correcting step from the signal generated by said generating step at said second time and corrected by said correcting step to generate a subtracted image signal; and detecting movement of said moving object in an image area within said field of view, based on the subtracted image signal.
Claim 34
Independent Claim
119 words
A method of detecting a moving image corresponding to a moving object within the field of view of a monitoring device, comprising the steps: generating signals corresponding to a scene, including the moving object, at first and second times; correcting the signals in accordance with the distance between the moving object and said monitoring device; subtracting the signal generated by said generating step at said first time and corrected by said correcting step from the signal generated by said generating step at said second time and corrected by said correcting step to generate a subtracted image signal; and detecting movement of said moving object in an image area within said field of view, based on the subtracted image signal.
Claim 35
Dependent Claim
54 words
The method of claim 26, wherein said generating step comprises the step of generating multilevel signals along each of a plurality of scanning lines, and said detecting step comprises the step of comparing the multilevel signals with a threshold and generating a detection signal in response to the comparison made by said comparing step.
Claim 36
Dependent Claim
14 words
The method of claim 26, wherein the dimension of the image area is fixed.
Claim 37
Dependent Claim
32 words
The method of claim 27, wherein said comparing step includes the step of comparing the multilevel signals with one threshold selected form a plurality of thresholds, each corresponding to a particular line.
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