| 摘要 |
The invention concerns a method to estimate the geometric distortion between a reference image and a distorted image comprising the steps of
- determining control points in each of the images,
- determining for each of these control points a feature vector, According to the invention, it comprises the steps of
- discarding in the reference image all the control points having similar feature vectors,
- discarding in the distorted image all the control points having similar feature vectors,
- defining a neighborhood around some of the control points and keeping only one control point in said neighborhood.
- matching the control points of the two images according to the distance of their feature vectors,
- establishing a distortion model from the matched control points of the two images
the matching step comprises sub-steps of
- finding a match point in the distorted image for each control point of the reference image obtaining a first list of couples of matched points,
- finding a match point in the reference image for each control point of the distorted image obtaining a second list of couples of matched points,
- keeping as matched control points_the control points which belong to couples which are in both lists. |
