红外线阵探测器盲元定位与补偿

Blind pixel detection and compensation for infrared linear detector

为减少红外线列探测器的条纹噪声与非均匀性噪声受环境温度和探测器工作时间的影响,提出了一种处理盲元的综合算法。首先依据探测器最终数据输出来检测盲元通道;然后依据通道位置与数量调整偏移量值,并根据探测器的阵列结构特点,对480×6个像元完成精确的盲元定位;最后完成对含有盲元通道的非均匀校正。以FPGA处理模块为核心,完成了红外探测器实时采集与处理。图像校正效果良好,具有良好的实时性和可移植性。

An integrated algorithm dealing with blind pixel was proposed to reduce the stripe noise and non﹣uniformity noise of the infrared linear detector which affected by ambient temperature and its operation time. First, the bad pixel channel was detected based on the final output data of the detector, and then the offset value was adjusted based on the position and number of the bad pixel channel, and an accurate bad pixel positioning to 480＆#215;6 pixel was finished according to the structure characteristics of the detector array. Non﹣uniformity correction of the bad pixel channel was completed in the end. In this paper, FPGA processing module was taken as the core of the whole algorithm to complete the real﹣time acquisition and processing of infrared images. The test results show that the qualities of correction images are all very well, and the algorithm proposed in this paper has a good real﹣time performance and portability.