| 基于FPGA的红外图像非均匀性校正系统设计 |
| 投稿时间：2023-04-16 修订日期：2023-04-28 点此下载全文 |
| 引用本文：郑洪波,邱晓庆,张浩平,黄茂潼.基于FPGA的红外图像非均匀性校正系统设计[J].红外,2023,44(9):8~15 |
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| 中文摘要:红外成像技术在众多领域得到广泛应用，但设计和制造工艺存在的非均匀性现象严重降低了红外图像的成像质量。针对这一问题，设计了一种基于现场可编程门阵列(Field-Programmable Gate Array, FPGA)的红外图像校正系统。该系统采用两点校正法对某国产短波探测器的像元增益和偏置进行更新，然后利用3σ算法实现盲元点的检测并利用邻域替代的思想进行盲元校正，通过将盲元点周围的有效像元值按比例替代盲元像元来降低运算复杂度。在基于XC5VLX110T型FPGA的硬件系统上进行实验。结果表明，所设计的红外图像校正系统改善了图像的非均匀性，提高了成像质量且成像速度快。此外，丰富的余量资源使得系统具有较好的扩展性。该系统在红外图像处理方面具有一定的应用价值。 |
| 中文关键词:非均匀性校正 盲元检测与校正 红外图像 现场可编程门阵列 |
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| Design of FPGA-Based Non-Uniformity Correction System for Infrared Images |
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| Abstract:Infrared imaging technology is widely used in many fields, but the non-uniformity of the design and manufacturing process seriously reduces the imaging quality of infrared images. To solve this problem, an infrared image correction system based on FPGA is designed. The system uses a two-point correction algorithm to update the pixel gain and bias of a domestic short-wave detector, then uses the 3σ algorithm to detect blind pixels and uses the idea of domain substitution to correct the blind pixels. The blind pixels are replaced by the values of valid pixels around the blind pixels in proportion to reduce the operational complexity. Experiments are carried out on the hardware system based on XC5VLX110T FPGA. The results show that the designed infrared image correction system can improve the image non-uniformity, the image quality and the imaging speed. In addition, the abundant spare resources make the system have better expansibility. This system has certain application value in infrared image processing. |
| keywords:non-uniformity correction detection and correction of blind pixel infrared image field-programmable gate array |
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