Arithmetic unit for image transformation and monitoring system
First Claim
1. 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.
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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.
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Citations
8 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4)
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5. A monitoring system comprising:
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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. - View Dependent Claims (6, 7, 8)
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Specification