3d geometric modeling from images on the web with arpenteur

International audience; The paper presents the ARPENTEUR project (ARchitectural PhotogrammEtryNetwork Tool for EdUcation and Research). This WEB-based tool has been developed since1998 and regularly completed and updated according to the evolution of the JavaDevelopment Kit proposed by SUNTM. The actual version is working on any browser and anyplatform updated with the J.D.K. 1.3 plug-in enriched by the Java Advancing ImagingLibrary (J.A.I. 1.0.2.). Presently two servers in Marseille and Strasbourg (France) are freelyavailable from any computer in the world connected to the Internet [www.arpenteur.net].Each user has an own workspace on the server in which all his project data (images, cameraand control point files, and other input or output files) are stored. Files can be up-ordownloadedwithin ARPENTEUR by simple File Transfer Protocol available in the mainmenu. Apart from Internet parameters which are characteristic for such tools on the WEB,specific modules dedicated to photogrammetry and 3D modeling are proposed.The photogrammetric module is presently based on the orientation of couples of images (notnecessarily stereopairs, and not necessarily from metric cameras) and well known steps ofinterior and exterior orientation. Image processing functions from the Java AdvancingImaging Library as well as an area based correlation method for the measurement ofhomologous points are included.The 3D modeling module has been complemented recently by a semi-automated PrimitiveMeasurement Method called I-MAGE (Image processing and Measure Assisted byGEometrical primitive). This measuring method is based on the coupling of imagecorrelation and geometric primitives as planes, cylinders, cone and sphere shapes of theobject. The resulted 3D models can be visualized either on the internet-oriented VRML pluginsor inside the MicrostationTM software package.Projects from any kind of images (terrestrial, close-range as well as aerial images resized to asmaller format for a better handling on the Internet) can be prepared on the Arpenteur'servers and be used as lecture material for groups of students