As an XML based network vector graphics format, SVG has many advantages and nicer prospects over other graphics formats.

New methods are proposed on how to convert raster and vector im-ages of AutoCAD, and how to get the vector image from raster image and exchange vector image into raster image by virtual printer isproposed especially,by which the goal of resolving the image conversion problems efficiently and in low cost will be achieved.

Homograph matrix is introduced and presented as the image space transform model between SAR image and vector image.

Variational models for image diffusion based on gradient and Laplacian;

The classic variational image diffusion models were extended to image diffusion on implicit surfaces by means of intrinsic image gradients defined on implicit surface expressed by zero level set function.

Recently, many scientists proposed the image diffusion method based on variational theory, the point of the method is protecting the edge when denoising.

At the same time, by introducing direction vector into the GVF model, in the region specified by this vector, the force fields of the objects not wanted can be shielded, and the interested ob.

A time varing forgetting factor and a new correlation function adaptive filtering algorithm are proposed by orthogonalizing the previous direction vector to the current direction vector.

Different from ancient Chinese, the vector direction and value of modern Chinese are both blurry, so to be clear, they need add some other words or complements.