4 papers
A Coupled Fourth Order Telegraph Diffusion Framework Using Grayscale Indicators for Image Despeckling
Manish Kumar, Rajendra K. Ray
Speckle noise severely limits the quality of images acquired from coherent imaging systems such as Synthetic Aperture Radar (SAR) and medical ultrasound. Traditional second-order P…
Single Image Defogging Using a Fourth-Order Telegraph PDE Guided by Physical Haze Modeling
Manish Kumar, Rajendra K. Ray
In real-world scenarios, image defogging is an inverse problem due to unknown scene depth, atmospheric scattering, and the common absence of ground truth . To resolve the issue, we…
Comparative Study of Weighted and Coupled Second- and Fourth-Order PDEs for Image Despeckling in Grayscale, Color, SAR, and Ultrasound
Manish Kumar, Rajendra K. Ray
Partial Differential Equation (PDE)-based approaches have gained significant attention in image despeckling due to their strong capability to preserve structural details while supp…
New Fourth-Order Grayscale Indicator-Based Telegraph Diffusion Model for Image Despeckling
Rajendra K. Ray, Manish Kumar
Second-order PDE models have been widely used for suppressing multiplicative noise, but they often introduce blocky artifacts in the early stages of denoising. To resolve this, we…