Method and apparatus for correction of an image from a fisheye lens in a camera
First Claim
Patent Images
1. A method of operating a video system, comprising the steps of:
- receiving an image captured by use of a fisheye lens;
dividing the image into a plurality of horizontal image lines; and
sampling a respective fraction of each of the horizontal image lines with a different respective sampling frequency, each sampling frequency being inversely related to a size of the sampled fraction, the size of the sampled fraction increasing with each horizontal image line in a progression from a top of the image to a bottom of the image.
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Abstract
A method of operating a video system includes receiving an image captured by use of a fisheye lens. The image is divided into a plurality of horizontal image lines. A respective fraction of each of the horizontal image lines is sampled with a different respective sampling frequency. Each sampling frequency is inversely related to a size of the sampled fraction. The size of the sampled fraction increases with each horizontal image line in a progression from a top of the image to a bottom of the image.
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Citations
20 Claims
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1. A method of operating a video system, comprising the steps of:
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receiving an image captured by use of a fisheye lens; dividing the image into a plurality of horizontal image lines; and sampling a respective fraction of each of the horizontal image lines with a different respective sampling frequency, each sampling frequency being inversely related to a size of the sampled fraction, the size of the sampled fraction increasing with each horizontal image line in a progression from a top of the image to a bottom of the image. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a video system, comprising the steps of:
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receiving a first analog image captured by use of a fisheye lens; converting the analog image into digital image data; dividing the image data into a plurality of image lines; sampling a respective middle portion of each of the image lines with a different respective sampling frequency, each sampling frequency being inversely related to a fraction of the respective image line occupied by the middle portion, the fraction of the image line occupied by the middle portion increasing with each image line in a progression from a first edge of the image to a second edge of the image; and converting the sampled digital image lines into a second analog image. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of operating a video system, comprising the steps of:
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receiving a first image captured by use of a fisheye lens; dividing the image into a plurality of horizontal image lines, each image line having a middle portion and two lateral portions, a size of the middle portion relative to the lateral portions increasing with each horizontal image line from a top of the image to a bottom of the image; discarding the lateral portions of the image lines; representing each of the middle portions by a substantially equal number of samples; and forming a second image including the samples. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification