High-Speed, SAD Based Wavefront Sensor Architecture Implementation on FPGA
| Autor: | Zoltan Kincses, György Mező, Zoltán Nagy, Péter Szolgay, László Orzó |
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| Rok vydání: | 2010 |
| Předmět: |
Wavefront
CMOS sensor business.industry Computer science Wavefront sensor ComputerSystemsOrganization_PROCESSORARCHITECTURES Theoretical Computer Science Liquid crystal on silicon Sum of absolute differences Hardware and Architecture Control and Systems Engineering Modeling and Simulation Signal Processing Pattern recognition (psychology) Adaptive optics business Field-programmable gate array Computer hardware Information Systems |
| Zdroj: | Journal of Signal Processing Systems. 64:279-290 |
| ISSN: | 1939-8115 1939-8018 |
| DOI: | 10.1007/s11265-010-0487-4 |
| Popis: | Wavefront aberrations caused by turbulent or rapidly changing media can considerably degrade the performance of an imaging system. To dynamically compensate these wavefront distortions adaptive optics is applied. We developed an affordable adaptive optic system which combines CMOS sensor and Liquid Crystal on Silicon (LCOS) display technology with the Field Programmable Gate Arrays (FPGA) devices parallel computing capabilities. A high-speed, accurate wavefront sensor is an elemental part of an adaptive optic system. In the paper, an efficient FPGA implementation of the Sum of Absolute Differences (SAD) algorithm, which accomplishes the correlation-based wavefront sensing, is introduced. This architecture was implemented on a Spartan-3 FPGA which is capable of real-time (>500 fps) measuring the incoming wavefront. |
| Databáze: | OpenAIRE |
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