基于SOPC的红外图像自适应非均匀性校正设计

发布时间：2018-06-01 23:56

本文选题：红外成像 + 非均匀性校正　；参考：《红外与激光工程》2017年06期

【摘要】：场景非均匀校正和基于本底信息无快门校正等红外图像自适应非均匀性无快门校正算法不需要中断探测过程,克服了定标类校正算法需要周期性定标的不足,目前日趋受到重视。相对于场景无快门校正算法,基于本底信息的自适应无快门校正算法具有复杂度低、易于实现的特点,正逐步从理论研究走向具体工程应用,通过硬件系统实现该校正算法具有重要的应用价值。根据自适应无快门校正算法理论特点,采用基于FPGA构建SOPC系统的方法进行了硬件实现,主要由校正参数计算、本底采集、校正模型等模块组成。校正参数计算部分根据自适应拉格朗日插值计算和更新校正参数,本底采集模块用于采集均匀本底信息,为图像校正提供一系列本底信息,校正模块完成红外图像的实时非均匀性校正。实验结果表明:实现的非均匀性无快门校正系统具有占用硬件资源少、延迟短和图像效果好的优点,能够广泛应用在红外成像系统中,具有较强的研究价值和现实意义。
[Abstract]:Scene non-uniformity correction and non-shutter correction based on background information, such as adaptive non-uniformity non-shutter correction algorithm, do not need to interrupt the detection process, which overcomes the deficiency of calibration algorithm which needs periodic calibration. At present, more and more attention is paid. Compared with the scene no-shutter correction algorithm, the background information based adaptive no-shutter correction algorithm has the characteristics of low complexity and easy to be implemented, so it is gradually moving from theoretical research to specific engineering applications. It has important application value to realize the correct algorithm by hardware system. According to the theoretical characteristics of adaptive no-shutter correction algorithm, the method of constructing SOPC system based on FPGA is implemented in hardware, which is mainly composed of correction parameter calculation, background acquisition, correction model and so on. The correction parameter calculation part calculates and updates the correction parameters according to the adaptive Lagrange interpolation. The background acquisition module is used to collect uniform background information, which provides a series of background information for image correction. The correction module completes the real-time non-uniformity correction of infrared image. The experimental results show that the non-uniform non-shutter correction system has the advantages of less hardware resource, shorter delay and better image effect. It can be widely used in infrared imaging system and has strong research value and practical significance.
【作者单位】：西北工业大学电子信息学院;中国空空导弹研究院;华中科技大学电子信息与通信学院;
【基金】：中央高校基本科研业务费专项基金(2016YXMS299)
【分类号】：TN21

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