短波红外图像非均匀性条纹噪声校正算法

Correction Algorithm of Non-uniform Stripe Noise in Short-wave Infrared Images

  • 摘要: 扫描型红外成像系统由于探测器系统的物理限制出现条纹非均匀性,条纹噪声效应严重降低了图像质量。现有的非均匀性校正算法在噪声抑制、细节保留和实时性之间存在一定的平衡问题,阻碍了其在光谱成像和信号处理领域的应用。为了解决这一问题,提出了一种创新的基于小波变换自适应分数阶总变分函数最小化的方法,以小波变换为基础、像素邻域梯度为整体算法的自适应参数。方法充分考虑了条纹噪声的固有特性和小波子带系数之间的联系,能以较低的计算负荷快速有效地去除条纹噪声、准确恢复细节。在真实数据上进行的大量实验结果表明,提出的方法在定量和定性评估上都优于几种经典的算法。

     

    Abstract: The physical limitations of detector systems cause stripe non-uniformity in scanning infrared imaging, severely degrading the image quality through stripe noise. However, existing non-uniformity correction algorithms struggle to balance noise suppression, detail preservation, and real-time performance, thereby limiting their use in spectral imaging and signal processing. To address the challenge of stripe noise, we propose an innovative wavelet-transform-based method to minimize the fractional total variational function. Based on the wavelet transform, the pixel neighborhood gradient serves as an adaptive parameter of the entire algorithm. By leveraging the relationship between stripe noise characteristics and wavelet sub-band coefficients, the proposed method efficiently removes stripe noise while accurately reconstructing image details with low computational cost. Comprehensive experiments on authentic data demonstrate that the proposed method outperforms several existing classical algorithms in both quantitative and qualitative evaluations.

     

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