Measurement of moments for centroid estimation in Shack–Hartmann wavefront sensor—a wavelet-based approach and comparison with other methods
| Autor: | L. Praveen Kumar, A. R. Ganesan, Pachiyappan Arulmozhivarman |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Wavefront
business.industry Computer science Fast Fourier transform ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Astrophysics::Instrumentation and Methods for Astrophysics Wavelet transform Centroid Cascade algorithm Wavefront sensor Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optics Wavelet Electrical and Electronic Engineering business Adaptive optics Shack–Hartmann wavefront sensor Algorithm |
| Zdroj: | Optik. 117:82-87 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2005.06.004 |
| Popis: | A wavelet-based method of moment calculation with a set of basis functions is presented for centroid estimation in a Shack-Hartmann Wavefront Sensor. The method has been compared with other algorithms such as statistical averaging, FFT and least-squares method. A comparative analysis shows that wavelet method has a high accuracy and processing speed, and better suited for wavefront reconstruction applications. Further, the wavelet method presented here has a variable accuracy and resolution, and can be optimized for a particular application under consideration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect