IMAGE RECTIFICATION METHOD
First Claim
Patent Images
1. An image rectification method comprising:
- detecting edges in an image by using a Canny filter;
performing Hough transform on the edges to detect lines in the image;
selecting a candidate quadrangle from quadrangles formed by the detected lines;
obtaining a transform matrix for transforming the candidate quadrangle to a rectangle by homographic transform;
rectifying the image by using the transform matrix; and
enhancing the rectified image.
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Abstract
An image rectification method includes the steps of: detecting edges in an image by using a Canny filter; performing Hough transform on the edges to detect lines in the image; selecting a candidate quadrangle from quadrangles formed by the detected lines; obtaining a transform matrix for transforming the candidate quadrangle to a rectangle by homographic transform; rectifying the image by using the transform matrix; and enhancing the rectified image
15 Citations
8 Claims
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1. An image rectification method comprising:
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detecting edges in an image by using a Canny filter; performing Hough transform on the edges to detect lines in the image; selecting a candidate quadrangle from quadrangles formed by the detected lines; obtaining a transform matrix for transforming the candidate quadrangle to a rectangle by homographic transform; rectifying the image by using the transform matrix; and enhancing the rectified image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification