This paper studied methods of contour interpolation, analyzed the advantages and disadvantages of each kind of these methods, and improved the triangulation method with the properties of contour, then proposed a method of contour interpolation based on Constraint Delaunay Triangulation.

The authors have developed a new ad doc finite element method to solve eigenvalues A and characteristic angular variation functions F(θ) in paper [20].

Following the introduction of linear interpolation, Gaussian interpolation, cubic spline interpolation and low pass filtering, emphasis is on the discussion of two-dimensional and separ.

In view of some drawbacks in gray associative analysis method, this paper presents a linear interpolation method, which considerably improves the resolution.

The paper investigate a structure of the digital down-converter(DDC) and put forward a design of numerical controlled oscillator with method of tabulation view and fraction ratio decimation filter with mixing linear interpolation algorithm and CIC filter,so that the DDC process could be implemented in software on general purpose DSP chip and afford greater flexibility.

In the context, qualified visual three-dimensional ICT pictures are achieved through multi-piece two-dimensional images accumulation by, combining with thresholding method and linear interpolation.