the Deduction of the Simple Light Reflection Model(Phong Model);

When a simplified Phong model is obtained by using the halfway vector H between L(the unit vector directed toward the point light source) and V(the unit vector pointing to the viewer from the surface position), there is a general relationship that the angle α between H and N(the unit normal surface vector) and the angle  between R(the unit vector in specular_reflection direction) and V:2α≥.

Phong illumination model is used in conventional GRECO to obtain geometric parameters,such as the normal vector.

In the light of Phong illumination model, an unit spherical surface under the same shading environment as the actual volume rendering is employed to emulate the real reflectional light of per-voxel, and a look-up table of voxels reflectional lights indexed in their normal N is made, on which the illumination of per-voxel may be quickly ascertained.

Imaging Model and Data Processing Technology of Large Format CCD Aerial Camera;

Using the template matching to find the object in the collected image,and find the center coordinates,then put coordinate values of the image into the imaging model and calculate the three-dimensional coordinates of the point.

It analyzes where imaging error comes from and method to resolve this problem,discusses the imaging model used in domanil of qulity detect.