Fitting Parameterized Three-dimensional Models to Images(16)

时间:2025-04-02

Model-based recognition and motion tracking depends upon the ability to solve for projection and model parameters that will best fit a 3-D model to matching 2-D image features. This paper extends current methods of parameter solving to handle objects with

Figure4:Animagefromamotionsequenceofapersonusingahanddrill.

oftheprojectedsegmentswerechosenformatching.ThemodelparameterswerechangedtoproducethestartingparameterestimatesshowninFigure3(b).Inthis gure,theperpendicularerrorsbeingminimizedaredisplayedasgraybarsbetweentheprojectedmodelsegmentsandthematchingimagesegments.Figures3(c)and3(d)showtheoutputfollowingthe rsttwoiter-ationsofthestabilizedalgorithmpresentedabove.Thisfastrateofconvergencewithinacoupleofiterationsistypicaloverawiderangeofinitialparametervalues(uptoatleast60degreeer-rorsinrotationparameters).SeeWorrall,Baker&Sullivan[34]forasystematicexplorationofconvergenceoverawiderangeoferrors,evenpriortotheadditionofthestabilizationandLevenberg-Marquardtmethods.Infact,divergenceisrelativelyrare,soitisuncommonfortheLevenberg-Marquardtmethodtotakeeffect;however,itscomputationalcostisalsolow,soitisprobablyofpracticalvalue.

6.1Applicationtomotiontracking

Oneinitialapplicationofthesemethodshasbeentotheproblemofmodel-basedmotiontrack-ing.ADatacubeimageprocessorwasusedtoimplementMarr-Hildreth[25]edgedetectioninrealtimeon512by485pixelimages.Theimagecontainingtheseedgepointsistransferredto

16

Fitting Parameterized Three-dimensional Models to Images(16).doc 将本文的Word文档下载到电脑

精彩图片

热门精选

大家正在看

× 游客快捷下载通道(下载后可以自由复制和排版)

限时特价:7 元/份 原价:20元

支付方式:

开通VIP包月会员 特价:29元/月

注:下载文档有可能“只有目录或者内容不全”等情况,请下载之前注意辨别,如果您已付费且无法下载或内容有问题,请联系我们协助你处理。
微信:fanwen365 QQ:370150219