An Image Denoising Algorithm Based On Preserving Details And Image Zooming Algorithm Based On Edge Extraction

Image processing involves a number of areas, such as Image Denoising, Image Restoration, Image Zooming, Image Segmentation,which can be attributed to a Inverse Problem, Or ill-posed problem.Because of the diversity of images, different subjects, tasks on the image characteristics, changes in the results are inconsistent, which requires different needs according to different models describe different image tasks. Partial Differential Equation can be used to construct the model and solve the model to obtain the image results from the physical geometric meanings of image processing, and it is widely used in the field of image denoising. The image interpolation method is applied to the field of image enlargement because of its small computation and high efficiency. In this paper, we mainly study the image denoising and image interpolation method based on PDE method. The main work is as follows:1. In the aspect of denoising, an anisotropic diffusion model based on PDE method is proposed. The degree of diffusion of the diffusion function is controlled by combining the gradient value with the local variance, so that the diffusion depends not only on the local variance information which is not susceptible to noise. The experimental results show that the denoising model proposed in this paper can keep more detailed information on the basis of denoising.2. In the aspect of image enlargement, an unbiased quadratic B -spline interpolation function and an edge detection adjustment algorithm are proposed. By dividing the quadratic B-spline interpolation function into multiple interpolation functions, the interpolation function has the advantages of interpolating the third-order interpolation function and the computational complexity, and overcoming the phase shift of the quadratic interpolation function; edge detection adjustment algorithm through the four steps to adjust the edge of the width of the information.In this paper, the denoising algorithm is Used as the preprocessing method and the magnification algorithm of the image, and the two algorithms are combined to form a complete amplification algorithm.