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煤矿井下特殊的应用环境直接影响着图像的质量,导致图像视觉效果较差。文章提出一种改进的基于四阶PDE的去噪方法,该方法将图像区域分为闪点区域和非闪点区域,并针对不同的区域采用不同的传导系数。与传统的各向异性扩散方法相比较,仿真实验结果表明,该方法在抑制噪声的同时能够有效克服二阶偏微分方程引起的块效应、消除闪点并保持图像的边缘、线条纹理等细节,从而达到更好的图像质量和视觉效果。
The special application environment in coal mine directly affects the quality of the image, resulting in poor visual effect of the image. This paper presents an improved denoising method based on fourth-order PDE. The method divides the image area into the flash area and the non-flash area, and adopts different conduction coefficients for different areas. Compared with the traditional anisotropic diffusion method, the simulation results show that this method can effectively suppress the block effect caused by the second-order partial differential equation, eliminate the flash point and keep the details of image edge and line texture while suppressing the noise. So as to achieve better image quality and visual effects.