This forum is disabled, please visit https://forum.opencv.org
 | 1 | initial version |
Hi, There are some methods reported in literature for example try googling: A Comparative Review Of Camera Calibrating Methods with Accuracy Evaluation and you can also refer Accuracy assesment section of Tsai's seminal paper were he proposes such tests: A versatile camera calibration technique for high accuracy 3d machine vision metrology using off-the-shelf tv cameras and lenses (1987)
| | 2 | explained one possible way to test accuracy of calibration parameters |
Hi, There are some methods reported in literature for example try googling: A Comparative Review Of Camera Calibrating Methods with Accuracy Evaluation and you can also refer Accuracy assesment section of Tsai's seminal paper were he proposes such tests: A versatile camera calibration technique for high accuracy 3d machine vision metrology using off-the-shelf tv cameras and lenses (1987) Specifically,i have also tried one method to estimate accuracy of calibration parameters:
1.Select a world coordinate system somewhere in the scene.
2.Mark some reference points in the scene with coordinates with respect to the chosen world coordinate system.
3.Capture an image with reference points in it.
4.Detect the image coordinates of reference points in original(distorted) image,consider these as TRUE values.
5.Now project the 3D coordinates of reference points into distorted image(i.e, apply distortion coefficients also) and compare them with TRUE coordinates.This can give you some idea of your calibration error.
| | 3 | added another reference |
Hi,
There are some methods reported in literature for example try googling:
A Comparative Review Of Camera Calibrating Methods with Accuracy Evaluation and you can also refer Accuracy assesment section of Tsai's seminal paper were he proposes such tests:
A versatile camera calibration technique for high accuracy 3d machine vision metrology using off-the-shelf tv cameras and lenses (1987). Further, you can refer section-2 in paper : Accuracy Improvement in Camera Calibration
Specifically,i have by FaJie Li, Qi Zang and Reinhard Klette, which also tried one method to estimate accuracy of mentions some approaches for evaluating camera calibration parameters:accuracy.
1.Select a world coordinate system somewhere in the scene.
2.Mark some reference points in the scene with coordinates with respect to the chosen world coordinate system.
3.Capture an image with reference points in it.
4.Detect the image coordinates of reference points in original(distorted) image,consider these as TRUE values.
5.Now project the 3D coordinates of reference points into distorted image(i.e, apply distortion coefficients also) and compare them with TRUE coordinates.This can give you some idea of your calibration error.
