Method and apparatus for correction of perspective distortion
First Claim
Patent Images
1. A method of correcting perspective distortion in an original image, the method comprising:
- determining two vanishing points associated with a plurality of points identified in the original image;
defining a reference rectangle centered about a singular reference point, the singular reference point being bounded within the plurality of points;
determining a set of reference points defining a reference quadrilateral within the reference rectangle, each reference point being located at an intersection of two lines, each line connecting a point on the reference rectangle to one of the vanishing points, the reference quadrilateral having an aspect ratio;
transforming the reference rectangle to have the aspect ratio of the reference quadrilateral using a processor, so as to generate a modified reference rectangle;
mapping the set of reference points onto the modified reference rectangle to generate a new image using a processor.
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Abstract
Perspective distortion in an imaged scene is corrected by identifying a group of points in the imaged scene such that the group of points define a shape. Two vanishing points are determined based on the group of points in the imaged scene. The process determines a first set of reference points within the shape defined by the group of points and transforms the first set of reference points into a second set of reference points. An aspect ratio associated with the first set of reference points is adjusted and the imaged scene is transformed to reduce perspective distortion in the imaged scene.
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Citations
21 Claims
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1. A method of correcting perspective distortion in an original image, the method comprising:
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determining two vanishing points associated with a plurality of points identified in the original image; defining a reference rectangle centered about a singular reference point, the singular reference point being bounded within the plurality of points; determining a set of reference points defining a reference quadrilateral within the reference rectangle, each reference point being located at an intersection of two lines, each line connecting a point on the reference rectangle to one of the vanishing points, the reference quadrilateral having an aspect ratio; transforming the reference rectangle to have the aspect ratio of the reference quadrilateral using a processor, so as to generate a modified reference rectangle; mapping the set of reference points onto the modified reference rectangle to generate a new image using a processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computing system for correcting perspective distortion in an original image, the computing system comprising:
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a memory storing a reference point generator, a reference point transformation module, an aspect ratio adjustment module, and an image mapping module; and an image processor that implements the reference point generator to define a reference rectangle centered about a singular reference point bounded within a plurality of points identified in the original image; the reference point transformation module to determine a set of reference points defining a reference quadrilateral from the reference rectangle, each reference point being located at an intersection of two lines, each line connecting a point on the reference rectangle to one of two determined vanishing points, the reference quadrilateral having an aspect ratio; the aspect ratio adjustment module to modify the reference rectangle to have an aspect ratio equal to the aspect ratio of the reference quadrilateral, so as to generate a modified reference rectangle; and the image mapping module to map the set of reference points onto the modified reference rectangle to create a new image.
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13. A computer readable medium storing computer executable instructions, which cause a computer to carry out a process, the process comprising:
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determining two vanishing points associated with a plurality of points identified in an original image; defining a reference rectangle centered about a singular reference point, the singular reference point being bounded within the plurality of points; determining a set of reference points defining a reference quadrilateral within the reference rectangle, each reference point being located at an intersection of two lines, each line connecting a point on the reference rectangle to one of the vanishing points, reference quadrilateral having an aspect ratio; transforming the reference rectangle to have the aspect ratio of reference quadrilateral, so as to generate a modified reference rectangle; mapping the set of reference points onto the modified reference rectangle to generate a new image. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification