Real-time distortion correction system of large-field optical display equipment based on FPGA

Chun Zheng; Yongjun Zhou; Yongrui Zheng; Jie Li

doi:10.1117/12.899291

18 August 2011 Real-time distortion correction system of large-field optical display equipment based on FPGA

Chun Zheng, Yongjun Zhou, Yongrui Zheng, Jie Li

Proceedings Volume 8194, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications; 81940S (2011) https://doi.org/10.1117/12.899291
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Current distortion correction systems can not meet the requirements of the large-field optical display equipment because of small field, low resolution, poor real-time property and commonality. "The symmetrical transform" and "the improved bilinear interpolation" were proposed. The general system scheme was designed and implemented in the Virtex-5 FPGA devices. The appropriate data structure of the look-up table was adopted and the optimized scheme for the input memory named "the double even-odd cache" was put forward. MIG (Memory Interface Generator) software tool was utilized to control DDR2 SDRAM and DSP48E was used. The real-time distortion correction system of the large-field optical display equipment was accomplished. The experimental result shows that the correction system can correct the large-field and high-resolution (1280x1024) video image (60 frames per second). The system delays only 1.48ms while the deviation in precision is less than 9' and has the well commonality.

Citation Download Citation

Chun Zheng, Yongjun Zhou, Yongrui Zheng, and Jie Li "Real-time distortion correction system of large-field optical display equipment based on FPGA", Proc. SPIE 8194, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, 81940S (18 August 2011); https://doi.org/10.1117/12.899291

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