文档介绍：摘要围内的逼近曲面。根据断层轮廓的特点,本算法综合运用了周期B样条和非周期B样条,讨论了封闭曲面和非封闭曲面的计算方法。另外插值和逼近的结合应用使该算法考虑到了曲面重建的精度,减少了计算量。除此之外,文中还对重建表面模型向CAD实体模型的转换过程进行了研究。文中接着研究了复杂曲面重建中遇到的两类关键技术问题——轮廓匹配和分支问题。文中给出了多轮廓曲面重建和含有复杂嵌套问题的多轮廓曲面重建时的匹配方法:通过建立轮廓树,确定轮廓的内外属性以及轮廓之间的相互嵌套关系,并缩小轮廓匹配的搜索范围;在轮廓树的基础上,利用阈值半径寻找轮廓,确定相邻切片上轮廓的对应关系。另外本文对分支问题可能遇到的情况和解决方法进行了研究。利用加权补分法,进行母轮廓分割,并结合中间层的插入,解决分支问题,从而进行曲面重构。关键词:图像增强边缘提取特征点计算非均匀B样条曲面插值逼近轮廓匹配分支问题 n Abstract ABSTRACT Atpresent,inlage dataVisualization,especiaIly visualization ofmedical image (such puted tomogr印hy(CD ic resonance inlaging(MRI)),llas e one of也c hotspots ofimage processing researcha舭r more than铆o -dimeIlsional(3D)reconstruction isthemost intuitiVe method oftllemedicalimage order toachieVe 3D reconstruction of themedicalimages,we must process images 、№can detectthecontours of theinterestedtemplates,o玛aIlize and pathological area easily-Then,we can achieVe the3D recons仃uctionof theextractedo玛ans,tissuesorbody lesions,andget the pu印ose ofadjuV觚tther印y,surgicalpla嫩ing,teaclling model孤d prostheticdesigll. Inmedical diagosis andsu玛ical planning,3D figure model anization isgenerated by theapplication of reVerse ,operation model is producted by the use ofrapid protot),pingtechnolo够On thebasis ofthemodel, doctor aCllieVes diagosis a11dsurgeⅨWhjch e虢ctiVely improVe thc leVel of diagnosis and su玛ery,sholrten me time,saVe thecost,andimpr0Ve me of center issue of t11isttlesisis the 3D reconstruction ofmedical slice—images. Inthispaper,we begin、)~,itll aIlintroduction to reVerse engineering and 3D reconstmctiontechnique ofmedicalimages,and wein仃oduce thecollectionmethods ofslice-images ,we introduce themethods andre_search status ofdigital image processing,medical inlage recoIlstruction and CAD models mainly research a11dimplement t11emethods and related teclulologies on the extraction of contollr lines of medical slice—images and geometric surface reconstruction,which