Image Denoising based on Fourth-Order Partial Differential Equations: A Survey

Reduction of noise is essential especially in the fieldof image processing. Several researchers arecontinuously working in this direction and providesome good insights, but still there are lot of scope inthis field.Noise mixed with image is harmful forimage processing. Inthis paper we survey severalaspects of image denoising and fourth-order partialdifferential equation.We also discuss severaltraditional methodology used with their advantagesand disadvantages. We also provide a deep analysisbased on the literature work from the previousresearch.