DocumentCode :
1934299
Title :
FPGA-based Optical Distortion Correction for Imaging Systems
Author :
Qiang, Lin ; Allinson, Nigel M.
Author_Institution :
Dept. of Electron. & Electr. Eng., Sheffield Univ.
Volume :
2
fYear :
2006
fDate :
16-20 2006
Abstract :
A novel algorithm for correcting optical spatial distortion in imaging systems is presented, together with the architectures implemented for FPGA-based hardware. Since coordinate transformation functions generally require square root and trigonometric functions, which are not easily calculated using FPGA hardware, the CORDIC (coordinate rotation digital computer) algorithms are employed for these function implementations. An effective pipelined implementation for the radius correction is also demonstrated. The hardware architecture of the spatial correction algorithm has been targeted successfully on a Xilinx Spartan 3 device using the minimum of slices. The experimental results show that the pincushion distortion correction algorithms produce a very low residual error
Keywords :
digital arithmetic; field programmable gate arrays; image processing; optical distortion; optical images; CORDIC; FPGA; coordinate rotation digital computer; imaging systems; optical distortion correction; radius correction; spatial correction algorithm; Apertures; Biomedical optical imaging; Computer architecture; Field programmable gate arrays; Hardware; Lenses; Nonlinear distortion; Optical distortion; Optical imaging; Optical refraction;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing, 2006 8th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9736-3
Electronic_ISBN :
0-7803-9736-3
Type :
conf
DOI :
10.1109/ICOSP.2006.345735
Filename :
4129027
Link To Document :
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