红外摄像机的辐射扭曲和非线性响应的校正方法
Shuangbao Shu1, Yufeng Fu1, Shenglin Liu1
1Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China.
The Review of scientific instruments
|March 1, 2024
概括
这项研究引入了一种新的校准方法,使用被动的棋盘来纠正红外 (IR) 摄像头中的辐射扭曲和非线性反应,显著提高温度测量准确度.
科学领域:
- 热图学 热图学 热图学 热图学
- 光学工程是指光学工程.
- 计量学 计量学 计量学
背景情况:
- 使用红外 (IR) 摄像头进行非接触式温度测量是多功能性的,但容易出现成像质量问题.
- 精度受到镜头偏差,环境温度和环境条件等因素的影响.
- 辐射扭曲和非线性反应是影响红外摄像头精度的关键挑战.
研究的目的:
- 开发和验证用于纠正射线扭曲和红外摄像头中的非线性反应的方法.
- 为了提高从IR成像获得的温度测量的整体准确性.
- 为红外热图应用提供一个强大的校准框架.
主要方法:
- 专门为红外摄像机设计了一个被动的棋盘校准板.
- 实施了使用衍生相机参数的辐射扭曲校正方法.
- 提出了一种多点分段校准,用于在不同温度范围内进行非线性响应校正.
- 针对细分温度范围的计算增益和偏移系数矩阵.
主要成果:
- 棋盘校准板有效地纠正了辐射扭曲,平均再投影误差低于0.16像素.
- 多点分段校准显著降低了温度测量的相对误差.
- 在100500°C范围内,平均相对误差从1.61%降至1.12% (减少0.49%).
- 在红外摄像头温度测量准确度方面取得了显著的改进.
结论:
- 开发的校准技术有效地解决了红外摄像头中的辐射扭曲和非线性响应问题.
- 被动棋盘板和细分校准方法提高了成像质量和测量精度.
- 这项工作为提高使用红外技术的非接触温度测量的准确性提供了宝贵的参考.
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