Application of the Adaptive Wiener Filter in Infrared Image Denoising for Molten Steel
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摘要: 红外测温系统的应用减少了人工测温的安全事故,但其温度的准确性取决于由红外热像仪获得的图像的质量。为了对钢水红外图像质量的影响,提出了基于自适应维纳滤波的去噪方法。通过自相关的参数指数衰减模型来控制算法的计算复杂性和敏感性,进而有效提高维纳滤波器的去降噪性能。基于对不同温度下钢水红外图像的去噪处理,验证了所提去噪方法比维纳滤波和稀疏分解方法的图像去噪具有更好的去噪性能。Abstract: The application of an infrared temperature measurement system reduces the occurrence of safety accidents during manual temperature measurement. However, the accuracy of the measurement depends on the quality of the image obtained using the infrared thermal imaging camera. To reduce the influence of noise on the quality of molten steel infrared images, this paper proposes a denoising method based on adaptive Wiener filtering. The autocorrelation parameter exponential decay model is used to control the computational complexity and sensitivity of the algorithm, thereby effectively improving the denoising performance of the Wiener filter. Based on the denoising processing of molten steel infrared images at different temperatures, it is verified that the proposed denoising method has better denoising performance than Wiener filtering and sparse decomposition methods.
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表 1 用于温度修正的现场参数信息
Table 1 Information for temperature correction
Temperature/℃ 25.0 Target distance/m 2.2 Atmospheric transmittance/% 100 Window transmittance/% 100 Global emissivity/% 62 表 2 不同温度下钢水红外图像去噪效果对比
Table 2 Comparison of denoising effect of molten steel infrared image under different temperatures
Noise processing method MSE PSNR/dB 1600℃ 1696℃ 1600℃ 1696℃ Wiener filter
Sparse decomposition
FIR wiener filter0.1130
0.0906
0.07980.1261
0.1001
0.080510.235
18.539
25.68310.095
19.168
26.956 -
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