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Automatic distortion measuring system with reticle positioning for enhanced accuracy
Automatic distortion measuring system with reticle positioning for enhanced accuracy
- Source :
- Measurement. 41:960-969
- Publication Year :
- 2008
- Publisher :
- Elsevier BV, 2008.
-
Abstract
- In this paper an automatic measuring system for lens distortion is presented. The system consists of a screen showing reticle-type target moving inward automatically and a camera to capture the image for analysis. The computer plots the center coordinate groups of the cross and obtains the distortion result of the testing camera lens. A new computation method of reticle positioning is used in this research with linear regressions. In the compensation process, we cancel the large deviation points, then transforms the coordinates of the original sampling points from a vertical sampling point group to a horizontal one with a 90° rotation around the original point. The experimental results, including system calibration, alignment calculation, mark locations, and statistical functions of inspection are presented and evaluated. The speed and accuracy of this imaging system are supported by the available experimental observations.
- Subjects :
- Engineering
business.industry
Applied Mathematics
Distortion (optics)
Computation
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Sampling (statistics)
Condensed Matter Physics
Camera lens
Reticle
Calibration
Point (geometry)
Computer vision
Artificial intelligence
Electrical and Electronic Engineering
business
Instrumentation
Rotation (mathematics)
Subjects
Details
- ISSN :
- 02632241
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Measurement
- Accession number :
- edsair.doi...........9388d89c95fc4fc8a0169126c5574fa9
- Full Text :
- https://doi.org/10.1016/j.measurement.2008.01.011