US6574376B1
Expired / Lapsed
US
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Arithmetic unit for image transformation and monitoring system
Assignee: MOVINGEYE Inc
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Filing: 1999-09-30
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Granted: 2003-06-03
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Expires: 2019-09-30
Abstract
Abstract An arithmetic unit for image transformation for transforming a fisheye image obtained by using a fisheye lens into a plane image for display, comprising: a first coordinate calculating unit for obtaining first projection coordinates derived by projecting coordinates on the plane image onto a fisheye image face as an imaginary object face; and a second coordinate calculating unit for obtaining second projection coordinates derived by projecting the first projection coordinates obtained by the first coordinate calculating unit onto the fisheye image face.
Inventors
- 👤 Fuminori Shiota
- 👤 Tetsuji Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:53
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/04; G06T3/047
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
An arithmetic unit for image transformation for transforming a fisheye image on a fisheye image face obtained by using a fisheye lens into a plane image for display on a plane image face, comprising: a first coordinate calculating unit for obtaining first projection coordinates on an imaginary hemispheric face from coordinates on the plane image face, wherein the first projection coordinates are derived by projecting the coordinates on the plane image face onto the imaginary hemispheric face, said first coordinate calculating unit outputting the first projection coordinates; and a second coordinate calculating unit for receiving the first projection coordinates and obtaining therefrom second projection coordinates on the fisheye image face, wherein the second projection coordinates are derived by projecting the first projection coordinates onto the fisheye image face.
Claim 2
Dependent Claim
128 words
An arithmetic unit for image transformation for transforming a fisheye image on a fisheye image face obtained by using a fisheye lens into a plane image for display on a plane image face, comprising: a first coordinate calculating unit for obtaining first projection coordinates on an imaginary hemispheric face from coordinates on the plane image face, wherein the first projection coordinates are derived by projecting the coordinates on the plane image face onto the imaginary hemispheric face, said first coordinate calculating unit outputting the first projection coordinates; and a second coordinate calculating unit for receiving the first projection coordinates and obtaining therefrom second projection coordinates on the fisheye image face, wherein the second projection coordinates are derived by projecting the first projection coordinates onto the fisheye image face.
Claim 3
Dependent Claim
32 words
An arithmetic unit for image transformation according to claim 1 , wherein a logic circuit for arithmetic operation has a pipelined architecture in each of the first and second coordinate calculating units.
Claim 4
Dependent Claim
43 words
An arithmetic unit for image transformation according to claim 2 , wherein the logic circuit for arithmetic operation is limited to calculations of addition, subtraction, multiplication, and square root, and division and other function calculations are handled by referring to a lookup table.
Claim 5
Dependent Claim
45 words
An arithmetic unit for image transformation according to claim 3 , wherein the second coordinate calculating unit is used to obtain the second projection coordinates by multiplying the first projection coordinates by a predetermined coefficient and the predetermined coefficient is obtained from the lookup table.
Claim 6
Dependent Claim
145 words
A monitoring system comprising: a CCD camera to which a fisheye lens is attached and a PCI bus substrate having an arithmetic unit for image transformation for transforming a fisheye image obtained by using the fisheye lens into a plane image for display, wherein the arithmetic unit for image transformation comprises: a first coordinate calculating unit for obtaining first projection coordinates on an imaginary hemispheric face from coordinates on the plane image face, wherein the first projection coordinates are derived by projecting the coordinates on the plane image face onto the imaginary hemispheric face, said first coordinate calculating unit outputting the first projection coordinates; and a second coordinate calculating unit for receiving the first projection coordinates and obtaining therefrom second projection coordinates on the fisheye image face, wherein the second projection coordinates are derived by projecting the first projection coordinates onto the fisheye image face.
Claim 7
Dependent Claim
145 words
A monitoring system comprising: a CCD camera to which a fisheye lens is attached and a PCI bus substrate having an arithmetic unit for image transformation for transforming a fisheye image obtained by using the fisheye lens into a plane image for display, wherein the arithmetic unit for image transformation comprises: a first coordinate calculating unit for obtaining first projection coordinates on an imaginary hemispheric face from coordinates on the plane image face, wherein the first projection coordinates are derived by projecting the coordinates on the plane image face onto the imaginary hemispheric face, said first coordinate calculating unit outputting the first projection coordinates; and a second coordinate calculating unit for receiving the first projection coordinates and obtaining therefrom second projection coordinates on the fisheye image face, wherein the second projection coordinates are derived by projecting the first projection coordinates onto the fisheye image face.
Claim 8
Dependent Claim
29 words
A monitoring system according to claim 5 , wherein a logic circuit for arithmetic operation has a pipelined architecture in each of the first and second coordinate calculating units.
Claim 9
Dependent Claim
40 words
A monitoring system according to claim 6 , wherein the logic circuit for arithmetic operation is limited to calculations of addition, subtraction, multiplication, and square root, and division and other function calculations are performed by referring to a lookup table.
Claim 10
Dependent Claim
42 words
A monitoring system according to claim 7 , wherein the second coordinate calculating unit is used to obtain the second projection coordinates by multiplying the first projection coordinates by a predetermined coefficient and the predetermined coefficient is obtained from the lookup table.
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) | 2006-06-02 | 2006-12-02 | 2007-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-02 | 2010-12-02 | 2011-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-02 | 2014-12-02 | 2015-06-03 | $7700.00 | Window Closed / Lapsed |