Calculates the perspective transform from four pairs of corresponding points.
| Name | Type | Range | Description | |
|---|---|---|---|---|
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inSrc | Point2DArray | Coordinates of quadrangle vertices in the source image. | |
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inDst | Point2DArray | Coordinates of the corresponding quadrangle vertices in the destination image. | |
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outM | Matrix | Calculated transformation matrix. | |
The functiona calculates the 3x3 matrix of perspective transform, that can be applied to an image using cvWarpPerspective filter.
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The sets of corresponding points drawn on images. Such sets mean that after transform one wants to have points specified in first set transformed to points in second set.
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Result of applying output matrix of cvGetPerspectiveTransform with input sets of points shown on images above to sample image using cvWarpPerspective. The cvWarpPerspective filter was used with inDWidth = 300, inDHeight = 300, inBorderMode = BORDER_CONSTANT and inInterpolation = INTER_CUBIC.
"Each of input array must contain four points in cvGetAffineTransform"
This article is valid for version 3.0.1012
