In order to get space camera image with good uniformity

a method of real-time TDI-CCD non-uniformity correction in orbit using XQ2VP40 FPGA is studied. Firstly the principle of CCD non-uniformity correction is analyzed

a two-point correction algorithm of half saturation gray and dark field gray is proposed

then the architecture of space cameras is introduced and correction algorithm utilizing FPGA is realized

finally the effect is proved by experimental result. The experimental results show that the method of CCD non-uniformity correcting is feasible

for the TDI-CCD whose non-uniformity is 5%

the non-uniformity is less than 1% after correction.