Correction of the Non-Uniformity for Multi-TDICCD Mosaic Camera on FPGA

To solve the non-uniformity problem of multi Time Delay Integral Charge Couple Device (TDICCD) mosaic camera, a non-uniformity correction algorithm is proposed and implemented on Field-Programmable Gate Array (FPGA) platform. Firstly, the generation and definition of non-uniformity are introduced; several common non-uniformity correction methods are discussed. Secondly, the correction algorithm is designed. Finally, considering the fix-point processing ability of FPGA, the correction algorithm is optimized properly, and implemented on FPGA. The experimental results indicate that the non-uniformity can be decreased from 8.3%to 2.0% in 1s for 3-TDICCD mosaic camera´s images with the proposed correction algorithm at 96TDI stage, proving that this correction algorithm is of high real-time performance, good practicality and satisfies the requirements of the target system.