Calibration of zoom lens with virtual optical pattern
| Autor: | Pierre Desaulniers, Simon Thibault, Aymen Arfaoui |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Diffraction
Zoom lens Digital zoom Calibration (statistics) Computer science business.industry Distortion (optics) Optical engineering ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Astrophysics::Instrumentation and Methods for Astrophysics General Engineering Field of view Atomic and Molecular Physics and Optics Collimated light law.invention Lens (optics) law Computer Science::Computer Vision and Pattern Recognition Computer graphics (images) Computer vision Artificial intelligence Zoom business Diffraction grating Camera resectioning |
| Zdroj: | Optical Engineering. 54:054107 |
| ISSN: | 0091-3286 |
| Popis: | The accuracy of calibration patterns, their fabrication, and their setup are some of the important challenges in a zoom-lens camera calibration process. We address these problems by using a cross-diffractive optical element, which generates a virtual, dense, and robust calibration grid. We show that a 33×33 calibration grid provides enough control points to fill the entire field of view for 10 to 20× zoom lenses. We show that the calibration of a zoom camera at infinity can be done using this method. A polynomial function has been used to model the variation of the intrinsic calibration parameters over the zoom range. The obtained calibration model has also been validated using a well-known target pattern. |
| Databáze: | OpenAIRE |
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