基于多角度视觉信息的目标3d重构技术分析

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1、哈尔滨工业大学工学硕士学位论文果得到具有真实感的三维效果图，在VS2010开发环境下利用openGL进行了纹理贴图操作，贴图结果表明重构模型正确，效果逼真。为测试算法的通用性，对智能手机后置摄像头和数码相机拍摄的图像分别进行实验，针对自拍摄图像SIFT特征匹配（初始匹配）误匹配率较高的问题提出一种迭代的斜率一致性方法先期剔除一部分误匹配，再用本文改进的RANSAC进行误匹配的2次剔除，可以保证RANSAC算法应用于高误匹配率情况下的收敛性，两次剔除后平均误差可以控制在0.6个像素以内，从而实现对重复性纹理丰富、人像遮挡影响严重的自拍摄图像也能保证匹配的精度和基础矩阵的较精确求解，为

2、后续的相机运动恢复和空间点三维坐标的精确求解奠定基础。本文提出的迭代的斜率一致性约束与同类方法的比较结果证实本文方法对误匹配剔除效果与同类方法不相上下，实时性比同类方法好得多。关键词：三维重构；立体匹配；视觉模型；基础矩阵；相机自标定；纹理贴图II哈尔滨工业大学工学硕士学位论文AbstractItisanimportantresearchissueinthefieldofcomputervisiontoreconstructthe3Dmodelwith2Dimagestakenbythedigitalcameras.3Dreconstructiontechniquebasedonm

3、ultipleviewgeometryiswidelyappliednotonlyindefenseandmilitaryfieldssuchasaerospaceequipment,targetdetection,battlefieldrobotvisionsystem,butalsointheindustrialcircleandcivilfieldssuchasautonomousrobotnavigation,VR,industrialproductionautomation,noncontactmeasurement,culturalrelicprotection,sec

4、urity,filmspecialeffectsand3Dgames.Themaintaskof3Dreconstruction:Shoottwoormultiple2Ddigitalimagesofthesame3Dscenefromdifferentangles,obtainonetoonemappingandpositiondeviationbetweencorrespondingimagepointsfromtwoadjacentimagesbystereomatchingalgorithm,calculateinternalcameraparametersandresto

5、retherelativeposebetweencameras(ormotionparametersofsinglecamera),inordertoobtain3Dgeometricinformationofthescene,andrealizethe3Dreconstructionofthescene.Themainworkandresearchresultsareasfollows:Methodsof3Dreconstructionofdifferentcasesandexternalconditionsaresummarized.3Dreconstructionforbin

6、ocularstereovisionimagingmodelofparallelalignmentconfigurationisrealized.MethodsandStrategiesof3Dreconstructionforgeneralbinocularstereovisionimagingmodelanduncalibratedcameravisionmodelaresummarizedandanalyzedindetails.Variedestimationmethodsoffundamentalmatrixareanalyzedandcompared.Realizedt

7、he3Dreconstructionunderbinocularstereovisionimagingmodelofparallelalignmentconfigurationandthehand-helduncalibratedcameravisionmodelrespectively.2Complete3Dreconstructionunderbinocularstereovisionimagingmodelofparallelalignmentconfigura