Three-dimensional Data Field Graph And Image Displaying And Processing Algorithm Of Key Technology Study

Three-dimensional field graph and image displaying and processing offer unprecedentedly ocular and natural man-machine interface to people among interactive three-dimensional data field. With the popularization of multimedia technology and internet developing, the interactive three-dimension graph and image displaying and processing already apply to a great deal of fields , such as manufacturing, building , geoscience , military , medical treatment , amusement ,etc.. In those application, the three-dimensional target's model and processing technology are undoubtedly most important. In studying the geographical information system based on lithosphere, We find multiresolution model of three-dimensional data field,compress,simplify,transmit ,continuous LOD ,the 3-D view noise is got rid of have not got unified settlement yet. So this text did research on the relevant algorithm of above-mentioned problems: (1)Mainly discuss the basic algorithms of classification of the three-dimensional data field and three-dimensional graph and image processing , including translation, rotating,etc.. for three-dimension to two-dimentional projection, we discussed parallel and orthogon projection mainly. including world to screen and screen to world methods. In polygon and model parts,it includeing line frame model,polygonal model ,three curve and pairs of three curved surface,topographical model,voxel model and four,eight fork tree technology, this part realize the designing model and processing . Provide the result of displaying finally. (2)In multiresolution topography technology based on wave analyses, first of all , utilize wave transformation in simplify topographical model, The algorithm uses the different sensibility of human vision to images on different view portion. By exploring wavelet transform, the whole model into block-based multi-resolution representation and uses quadtree structure to accelerate the simplification of whole model. This kind of method does not have huge auxiliary data, so space complexity is relatively low. For LOD model that the real-time trends are continuous , It has been implemented for approximating and rendering terrain models and the experimental results show its high efficiency. (3)Three-dimensional graphs have outstanding advantage. Its can display object abundant detail information and true three-dimensional result, and can imitate the real world through fixing up in scene . Generally speaking, the three-dimensional graph is expressed with the triangular net model mainly. Because the data amount of the three-dimensional graph is generally very enormous , need a large number of memory spaces, for complicated model even more, in addition, the restriction of bandwidth of network, the three-dimensional graph and image has outstanding networks bottleneck for transmit . In order to reduce the memory space , accelerate the transmission speed, the net must get effective compression like media's files , video , audio frequency ,etc. . Through is it divide to three-dimensional figure transmitted to want layer deal withDivide layer , receive end set up 2 forks of trees of BSP to go on, draw layer that correlate with vision and can see triangular information, is it transmit datum reduce rapidly to make, but does not influence receiving the treatment to sensitive data of end and show (4)For three-dimensional data field noise, it calculate three-dimensional data edge curved surface of field , then analyse the curved surface , for the roughness part , adopt the spreading model of to process , add three-dimensional data field illumination and color to diaplay finally. we apply above-mentioned methods to three-dimensional data geological model Is it dispel coarse noise of polygonal model The experimental result indicates , this algorithm has the characteristics that calculate steadily, high-efficient. The achievement of this thesis as follows: (1)This text propose Biothogonal Compact Wavelet Multi-resolution Analysis Model , through structure linear phase and symmetry, make it superior to a common one. linear phase and symmetry reduce resolve errors of model, Compacting guarantee its linear time-constrain. for data model, adopt four fork tree, algorithm according to human eye angle and distance of vision, produce the corresponding data structure , achieve the purpose of simple data. the earth's surface displaying algorithms was...