An improved infrared image post-processing method for metals and composites

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2024-10-02 DOI:10.1016/j.infrared.2024.105576

Dan Wu, Yifan Wang, Zhifei Miao, Chenghao Wu

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引用次数: 0

Abstract

Post-processing of the infrared thermography image is crucial for nondestructive testing, which will reduce noise and disturbance considerably. In this work, an improved image post-processing method based on the temperature ratio is proposed, namely the Thermal Image Division (TID) method. To validate this method, we carried out experiments on different materials such as composite CFRP (carbon fiber reinforced polymer) plates, 304 stainless steel plates and aluminum alloy samples. The results show the proposed method is pretty useful, significantly improves the signal-to-noise ratio of the image by comparing with other post-processing methods. It’s not only beneficial for identifying the edge of the defect, but also facilitates the detection of smaller defects with deeper depth. The signal-to-noise ratio is improved by nearly 117.5 % from practice. The TID method was applied to the defect size detection of pulse thermography and ultrasonic thermography. The results indicate TID method has good robustness, significantly reduces the error of defect size quantification.

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改进的金属和复合材料红外图像后处理方法

红外热成像图像的后处理对于无损检测至关重要，它将大大减少噪声和干扰。在这项工作中，我们提出了一种基于温度比的改进图像后处理方法，即热图像分割（TID）方法。为了验证这种方法，我们在不同材料上进行了实验，如复合 CFRP（碳纤维增强聚合物）板、304 不锈钢板和铝合金样品。结果表明，与其他后处理方法相比，所提出的方法非常有用，能显著提高图像的信噪比。它不仅有利于识别缺陷边缘，还有利于检测深度较深的较小缺陷。与实践相比，信噪比提高了近 117.5%。TID 方法被应用于脉冲热成像和超声热成像的缺陷尺寸检测。结果表明 TID 方法具有良好的鲁棒性，能显著降低缺陷尺寸量化的误差。

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.