兩點(diǎn)校正算法是一種行之有效的紅外圖像非均勻校正方法.本文對(duì)兩點(diǎn)校正算法進(jìn)行
了分析,并推導(dǎo)出了該算法的定點(diǎn)表示形式.利用FPGA在硬件上實(shí)現(xiàn)了該算法,內(nèi)部采用流水線技術(shù),校正系數(shù)存儲(chǔ)在FPGA的片內(nèi)存儲(chǔ)器中并實(shí)現(xiàn)了盲元補(bǔ)償.仿真和實(shí)驗(yàn)結(jié)果證明該設(shè)計(jì)是可行的,達(dá)到了預(yù)期效果.
關(guān)鍵詞:紅外焦平面;現(xiàn)場(chǎng)可編程門陣列;非均勻校正;盲元
Abstract: The algorithm of the two-point correction is an effective nonuniformity correction
method for infrared image .In this paper, the method is analyzed and the formula in the fix-point form is sequently deduced. Moreover, the algorithm is implemented on the hardware structure of FPGA. In the FPGA design, the pipelined technique is applied and the correction coefficient is stored in the interior memory of FPGA, meanwhile, blind pixel compensation is implemented. Both simulation and experimental results demonstrate that the method is feasible and the anticipated effect is achieved.
Keywords: infrared focal plane; FPGA; nonuniformity correction; blind pixel