自适应积分时间改变的红外焦平面非均匀校正方法

基于黑体标定的红外焦平面校正方法, 当探测器工作积分时间与校正参数获取时的积分时间不一致时校正效果会变差, 究其原因主要是因为像元的响应输出随积分时间呈现一定的非线性, 传统黑体定标类的校正方法属于积分时间维度上的单点校正。针对该问题提出了一种自适应积分时间改变的非均匀校正方法, 该方法在辐射通量和积分时间两个维度上都进行多点校正, 从而有效解决了变积分时间时校正效果变差的问题。另外, 该方法直接存储原始黑体标定数据用于校正, 不需要存储增益及偏置校正系数。使用局部非均匀性均值作为校正效果的评价方法, 该评价方法更能反映校正后残差的局部特性。实验表明, 相对于传统方法, 该方法能够有效降低积分时间改变时校正后的图像非均匀性, 提高了黑体定标类校正方法的工程适用性。

Abstract

It was found that when the integration time of the detector was not consistent with the time when the correction parameters were obtained, the correction effect would get worse for the non-uniformity correction method of the infrared focal plane array detectors based on the blackbody calibration. The main reason was that the response of output pixel was nonlinear with integration time, and traditional blackbody calibration methods belonged to single point correction in the dimension of integration time. Aiming at this problem, an adaptive non-uniformity correction method for integration time changing was presented, which used multi-point correction method in two dimensions of radiation flux and integration time, thereby effectively solving the problem. In addition, this method used the actual response data as the calibration data, which can effectively save the parameter space. The mean value of local non-uniformity was used as the evaluation method of the correction effect, and the evaluation method could reflect the local characteristics of the residual after correction. Experimental results show that this method can effectively reduce the non-uniformity caused by the integration time changing compared with the traditional methods, and improves the engineering applicability of the methods based on the blackbody calibration.

参考文献

[1] 刘慧, 朱明超, 吴泽鹏, 等. 红外焦平面阵列非均匀性自适应校正方法[J]. 红外与激光工程, 2014, 43(5): 1364-1369.

Liu Hui, Zhu Mingchao, Wu Zepeng, et al. Adaptive nonuniformity correction method for infrared focal plane arrays[J]. Infrared and Laser Engineering, 2014, 43(5): 1364-1369. (in Chinese)

[2] 陈钱. 红外图像处理技术现状及发展趋势[J]. 红外技术, 2013, 35(6): 311-318.

Chen Qian. The status and development trend of infrared image processing technology[J]. Infrared Technology, 2013, 35(6): 311-318. (in Chinese)

[3] Zuo C, Chen Q, Gu G, et al. New temporal high-pass filter nonuniformity correction based on bilateral filter[J]. Optical Review, 2011, 18(2): 197-202.

[4] Harris J G. Nonuniformity correction of infrared image sequences using the constant-statistics constraint[J]. IEEE Transactions on Image Processing, 1999, 8(8): 1148-1151.

[5] Zuo C, Chen Q, Gu G, et al. Scene-based nonuniformity correction algorithm based on interframe registration[J]. Journal of the Optical Society of America A Optics Image Science & Vision, 2011, 28(6): 1164-1176.

[6] 冷寒冰, 易波, 谢庆胜, 等. 基于时域矩匹配的红外图像自适应非均匀性校正[J]. 光学学报, 2015, 35(4): 0410003.

Leng Hanbing, Yi Bo, Xie Qingsheng, et al. Adaptive nonuniformity correction for infrared images based on temporal moment matching[J]. Acta Optica Sinica, 2015, 35(4): 0410003. (in Chinese)

[7] 贺明, 王亚弟, 贺菁,等. 双边滤波直方图均衡的非均匀性校正算法[J]. 红外与激光工程, 2013, 42(10): 2620-2624.

He Ming, Wang Yadi, He Jing, et al. Non-uniformity correction algorithm based on bilateral filter histogram equalization[J]. Infrared and Laser Engineering, 2013, 42(10): 2620-2624. (in Chinese)

[8] Qu H M, Gong J T, Huang Y, et al. New non-uniformity correction approach for infrared focal plane arrays imaging[J]. Journal of the Optical Society of Korea, 2013, 17(2):213-218.

[9] 赖睿, 杨银堂, 王炳健,等. 一种基于S曲线模型的红外焦平面阵列非均匀性自适应校正算法[J]. 光学学报, 2009, 29(4): 927-931. (in Chinese)

Lai Rui, Yang Yintang, Wang Bingjian, et al. S-curve model-based adaptive algorithm for nonuniformity correction in infrared focal plane arrays[J]. Acta Optica Sinica, 2009, 29(4):927-931.

[10] 文勇, 刘思超, 金友山, 等. CTIA型读出电路非线性的研究[J]. 激光与红外, 2009, 39(9): 978-981.

Wen Yong, Liu Sichao, Jin Youshan, et al. Investigation on the nonlinearity of CTIA readout circuit[J]. Laser & Infrared, 2009, 39(9): 978-981. (in Chinese)

[11] 党兴菊, 吴文良. 最小二乘法拟合直线公式的初等推导[J]. 重庆科技学院学报(自然科学版), 2010, 12(4): 185-187.

Dang Xingju, Wu Wenliang. Elementary derivation on the formulas of MLS fitting line[J]. Journal of Chongqing University of Science and Technology(Natural Science Edition), 2010, 12(4): 185-187. (in Chinese)

崔坤, 陈凡胜, 苏晓锋, 蔡萍. 自适应积分时间改变的红外焦平面非均匀校正方法[J]. 红外与激光工程, 2017, 46(11): 1104001. Cui Kun, Chen Fansheng, Su Xiaofeng, Cai Ping. Adaptive non-uniformity correction method for IRFPA with integration time changing[J]. Infrared and Laser Engineering, 2017, 46(11): 1104001.

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