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ippStsQuadErr
Perspective and projective image transforms require a usable quadrangle. If the points form a line, triangle, self-intersecting shape or otherwise nonconvex polygon, the mapping cannot define a valid image area.
Check geometry before blaming interpolation. A legal interpolation mode cannot repair a degenerate set of corner points.
Check these details
- Corner order: clockwise and counter-clockwise order should not be mixed.
- Duplicate points and nearly collinear vertices.
- Whether source and destination quadrangles use the same coordinate convention.
Intel IPP Error Reporting · Intel IPP Image Processing Reference · OpenCV geometric transforms
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