Mercurial Hosting > traffic-intelligence
changeset 1174:2f89dc3d99e5
clarification of worldToImageProject method
| author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
|---|---|
| date | Fri, 17 Dec 2021 14:26:45 -0500 |
| parents | c1766bb5076c |
| children | 35725db5e83f |
| files | trafficintelligence/cvutils.py |
| diffstat | 1 files changed, 4 insertions(+), 2 deletions(-) [+] |
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--- a/trafficintelligence/cvutils.py Mon Oct 18 11:42:53 2021 -0400 +++ b/trafficintelligence/cvutils.py Fri Dec 17 14:26:45 2021 -0500 @@ -569,9 +569,11 @@ return homographyProject(points, homography) def worldToImageProject(points, intrinsicCameraMatrix = None, distortionCoefficients = None, homography = None): - '''Projects points (2xN array) from image (video) space to world space + '''Projects points (2xN array) from world space to image (video) space 1. through undistorting if provided by intrinsic camera matrix and distortion coefficients - 2. through homograph projection (from ideal point (no camera) to world)''' + 2. through homograph projection (from ideal point (no camera) to world) + + Warning: this usually means to invert the homography if computer from image (ideal point) to world space, eg using numpy.linalg.inv''' if points.shape[0] != 2: raise Exception('points of dimension {}'.format(points.shape))