US5870141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion vector detection circuit and object tracking camera apparatus
Assignee: Xacti Corp
•
Filing: 1996-08-27
•
Granted: 1999-02-09
•
Expires: 2016-08-27
Abstract
Abstract A motion vector detection circuit includes a single representative point memory into which representative point data at a preceding frame of all of a plurality of detection blocks formed in a motion vector detection area in an overlapped manner are written. All pixel data at a current frame of the motion vector detection area are written into a single pixel memory. The representative point data are selectively read-out from the representative point memory, and the pixel data of a detection block corresponding to the selected representative point data are read-out from the pixel memory. Then, correlation of the selected representative point data between the pixel data is determined by a correlator, whereby a motion vector can be detected. Since all the representative point data and all the pixel data in the motion vector detection area are respectively written into the representative point memory and the pixel memory, it is possible to reduce the number of components and a cost.
Inventors
- 👤 Hideki Matsumura
- 👤 Akio Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:35
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/20; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/785; G01S3/786; G01S3/7864; H; H04; H04N; H04N19/00; H04N19/42; H04N19/43; H04N19/433; H04N19/50; H04N19/503; H04N19/51; H04N23/00; H04N23/80; H04N5/00; H04N5/14; H04N5/144; H04N5/145; H04N7/00; H04N7/18; H04N7/183
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
185 words
A motion vector detection circuit, comprising: a single pixel memory which has a memory capacity associated with a motion vector detection area, and stores pixel data of a plurality of detection blocks formed in said motion vector detection area in a manner that portions of respective detection blocks are overlapped with each other, each of said detection blocks having a predetermined number of pixels including pixels shared with at least one other detection block in an overlapped portion; a single representative point memory which stores representative point data of all of said plurality of detection blocks; first reading means which selectively reads-out the pixel data of said predetermined number of pixels in association with a respective one of said detection blocks from said pixel memory; second reading means which reads-out the representative point data in association with said respective one of said detection blocks from said representative point memory; and correlation means which receives pixel data read-out by said first reading means and the representative point data read-out by said second reading means, and determines correlation between the pixel data and the representative point data.
Claim 2
Dependent Claim
185 words
A motion vector detection circuit, comprising: a single pixel memory which has a memory capacity associated with a motion vector detection area, and stores pixel data of a plurality of detection blocks formed in said motion vector detection area in a manner that portions of respective detection blocks are overlapped with each other, each of said detection blocks having a predetermined number of pixels including pixels shared with at least one other detection block in an overlapped portion; a single representative point memory which stores representative point data of all of said plurality of detection blocks; first reading means which selectively reads-out the pixel data of said predetermined number of pixels in association with a respective one of said detection blocks from said pixel memory; second reading means which reads-out the representative point data in association with said respective one of said detection blocks from said representative point memory; and correlation means which receives pixel data read-out by said first reading means and the representative point data read-out by said second reading means, and determines correlation between the pixel data and the representative point data.
Claim 3
Dependent Claim
88 words
A motion vector detection circuit according to claim 1, further comprising: writing means for writing the pixel data of said detection blocks into said pixel memory at every one line; and inputting means for inputting predetermined beginning pixel data of each line in synchronous with writing of the pixel data into said pixel memory; wherein said second reading means reads-out representative point data associated with said predetermined pixel data, and said correlation means determines the correlation between said predetermined beginning pixel data and said read-out representative point data.
Claim 4
Dependent Claim
26 words
A motion vector detection circuit according to claim 1, wherein said first reading means reads-out said pixel data from said pixel memory at every one line.
Claim 5
Dependent Claim
41 words
A motion vector detection circuit according to claim 3, wherein said first reading means selectively reads-out said pixel data in accordance with the number of the detection blocks overlapped on a line from which said pixel data are to be read-out.
Claim 6
Dependent Claim
40 words
A motion vector detection circuit according to claim 3, wherein said first reading means selectively reads-out said pixel data in accordance with positions of the detection blocks overlapped on a line from which said pixel data are to be read-out.
Claim 7
Dependent Claim
84 words
A motion vector detection circuit according to claim 3, wherein said first reading means includes a first counter enabled for a predetermined period corresponding to the number of the detection blocks overlapped on a line from which said pixel data are to be read-out, and address generating means for generating read addresses of said pixel data in accordance with count values of said first counter and positions of the detection blocks overlapped on a line from which said pixel data are to be read-out.
Claim 8
Dependent Claim
43 words
A motion vector detection circuit according to claim 1, wherein said pixel memory has a memory capacity equal to said motion vector detection area, and the pixel data included in all of said plurality of detection blocks are stored in said pixel memory.
Claim 9
Dependent Claim
45 words
A motion vector detection circuit according to claim 1, wherein said pixel memory has a memory capacity equal to one line in said motion vector detection area, said pixel memory temporally storing the pixel data of said plurality of detection blocks one by one line.
Claim 10
Dependent Claim
242 words
An object tracking camera apparatus, comprising: an optical lens; pixel data outputting means which outputs pixel data on the basis of an object image outputted from said optical lens; a single pixel memory which has a memory capacity associated with a motion vector detection area, and stores said pixel data of a plurality of detection blocks formed in said motion vector detection area in a manner that portions of respective detection blocks are overlapped with each other, each of said detection blocks having a predetermined number of pixels including pixels shared with at least one other detection block in an overlapped portion; a single representative point memory which stores representative point data of all of said plurality of detection blocks; first reading means which selectively reads-out said pixel data of said predetermined number of pixels in association with respective one of said detection blocks from said pixel memory; second reading means which reads-out the representative point data in association with said respective one of said detection blocks from said representative point memory; and correlation means which receives pixel data read-out by said first reading means and the representative point data read-out by said second reading means, and determines correlation between the pixel data and the representative point data; motion vector generating means which generates a motion vector on the basis of a determination result of said correlation means; and control means which controls said optical lens in accordance with said motion vector.
Claim 11
Dependent Claim
242 words
An object tracking camera apparatus, comprising: an optical lens; pixel data outputting means which outputs pixel data on the basis of an object image outputted from said optical lens; a single pixel memory which has a memory capacity associated with a motion vector detection area, and stores said pixel data of a plurality of detection blocks formed in said motion vector detection area in a manner that portions of respective detection blocks are overlapped with each other, each of said detection blocks having a predetermined number of pixels including pixels shared with at least one other detection block in an overlapped portion; a single representative point memory which stores representative point data of all of said plurality of detection blocks; first reading means which selectively reads-out said pixel data of said predetermined number of pixels in association with respective one of said detection blocks from said pixel memory; second reading means which reads-out the representative point data in association with said respective one of said detection blocks from said representative point memory; and correlation means which receives pixel data read-out by said first reading means and the representative point data read-out by said second reading means, and determines correlation between the pixel data and the representative point data; motion vector generating means which generates a motion vector on the basis of a determination result of said correlation means; and control means which controls said optical lens in accordance with said motion vector.
Claim 12
Dependent Claim
88 words
An object tracking camera apparatus according to claim 9, further comprising: writing means for writing the pixel data of said detection blocks into said pixel memory at every one line; and inputting means for inputting predetermined beginning pixel data of each line in synchronous with writing of the pixel data into said pixel memory; wherein said second reading means reads-out representative point data associated with said predetermined pixel data, and said correlation means determines the correlation between said predetermined beginning pixel data and said read-out representative point data.
Claim 13
Dependent Claim
26 words
An object tracking camera apparatus according to claim 9, wherein said first reading means reads-out said pixel data from said pixel memory at every one line.
Claim 14
Dependent Claim
41 words
An object tracking camera apparatus according to claim 11, wherein said first reading means selectively reads-out said pixel data in accordance with the number of the detection blocks overlapped on a line from which said pixel data are to be read-out.
Claim 15
Dependent Claim
40 words
An object tracking camera apparatus according to claim 11, wherein said first reading means selectively reads-out said pixel data in accordance with positions of the detection blocks overlapped on a line from which said pixel data are to be read-out.
Claim 16
Dependent Claim
84 words
An object tracking camera apparatus according to claim 11, wherein said first reading means includes a first counter enabled for a predetermined period corresponding to the number of the detection blocks overlapped on a line from which said pixel data are to be read-out, and address generating means for generating read addresses of said pixel data in accordance with count values of said first counter and positions of the detection blocks overlapped on a line from which said pixel data are to be read-out.
Claim 17
Dependent Claim
43 words
An object tracking camera apparatus according to claim 9, wherein said pixel memory has a memory capacity equal to said motion vector detection area, and the pixel data included in all of said plurality of detection blocks are stored in said pixel memory.
Claim 18
Dependent Claim
45 words
An object tracking camera apparatus according to claim 9, wherein said pixel memory has a memory capacity equal to one line in said motion vector detection area, said pixel memory temporally storing the pixel data of said plurality of detection blocks one by one line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-08 | 2002-08-10 | 2003-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-08 | 2006-08-10 | 2007-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-08 | 2010-08-10 | 2011-02-09 | $7700.00 | Window Closed / Lapsed |