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<P><FONT SIZE=2 FACE="Arial">Hey folks….</FONT>
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<P><FONT SIZE=2 FACE="Arial">I just saw a presentation on using imagery to update vector databases using Deformbale Polygon models based on stats and gradients… it was cool to watch a rough road line fix itself towards a georeferenced image. The issue for me is that the work done ast a masters level is slow to find a comercial niche. So I was wondering if it existed already in the open source realm….Or maybe I can just get people thinking about it so that someone can find a link.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">The presentation I saw was based on research done at Universite de Sherbrooke: </FONT><A HREF="http://www.usherbrooke.ca/"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://www.usherbrooke.ca/</FONT></U></A>
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<P><FONT SIZE=2 FACE="Arial">The presenter developed the idea with a bunch of other people that were working on different aspects of a similar approach.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Here is the main paper I think: "Spatial database updating using active contours for multispectral Image"</FONT>
<BR><A HREF="http://cs-linux.ubishops.ca/~bentabet/BentabetIsprs.pdf"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://cs-linux.ubishops.ca/~bentabet/BentabetIsprs.pdf</FONT></U></A>
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<P><FONT SIZE=2 FACE="Arial">The process has been used in medical research a lot and has lots of application in the geomatics world.</FONT>
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<P><FONT SIZE=2 FACE="Arial">I came cross JESS which is a java open source project (Source by request, see software link bellow), an abstarct is availbale here </FONT><A HREF="http://adsabs.harvard.edu/abs/2005SPIE.5747.1985M"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://adsabs.harvard.edu/abs/2005SPIE.5747.1985M</FONT></U></A></P>
<P><FONT SIZE=2 FACE="Arial">Lots of medical examples found here: </FONT><A HREF="http://iacl.ece.jhu.edu/projects/gvf/gvf_cite_abstract.html"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://iacl.ece.jhu.edu/projects/gvf/gvf_cite_abstract.html</FONT></U></A>
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<P><FONT SIZE=2 FACE="Arial">I am wondering if this is something already availabel in OSSIM or maybe GRASS. Or if it is possible ot implement.</FONT>
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<P><FONT SIZE=2 FACE="Arial">The technique was new in that it used previous algorythms to form a + - model based on if success was had using statistics of the image or if they used the gradient of the image for push/pull factors.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">The image processing looks intensive and the presentor mentioned the need in a comercial environment for the creation of ZIP or ZIP lock polygons so that you can process line segments instead of the whole polygon.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Anyone have any further references?</FONT>
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<P><FONT SIZE=2 FACE="Arial">Some other sources:</FONT>
<BR><A HREF="http://www.scs.ryerson.ca/~tmcinern/isbi2006.pdf"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://www.scs.ryerson.ca/~tmcinern/isbi2006.pdf</FONT></U></A>
<BR><A HREF="http://www.scs.ryerson.ca/~tmcinern/software.html"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://www.scs.ryerson.ca/~tmcinern/software.html</FONT></U></A>
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<P><FONT SIZE=2 FACE="Arial">Some abstracts from the author and presentor Sylvie Jodouin:</FONT>
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<P><FONT FACE="Arial">Bentabet, Layachi; Jodouin, Sylvie; Ziou, Djemel; Vaillancourt, Jean </FONT>
<BR><FONT FACE="Arial">Road Vectors Update Using SAR Imagery : A Snake Based Method </FONT>
<BR><FONT FACE="Arial">IEEE Transactions on Geosciences and Remote Sensing, Volume 41, Numéro 8, pp. 1785-1803, 2003 </FONT>
<BR><FONT COLOR="#FF0000" FACE="Arial">[Accès restreint]</FONT><FONT FACE="Arial"> </FONT><A HREF="http://www.moivre.usherbrooke.ca/SearchArticles/keywords.aspx?idarticle=86"><U><FONT COLOR="#0000FF" FACE="Arial">[Informations complémentaires]</FONT></U></A><FONT FACE="Arial"> </FONT>
<BR><A HREF="http://www.moivre.usherbrooke.ca/SearchArticles/Files/Restricted/86/52.pdf"><U><FONT COLOR="#0000FF" FACE="Arial">PDF</FONT></U></A>
<BR><FONT FACE="Arial">Jodouin, Sylvie; Bentabet, Layachi; Ziou, Djemel; Vaillancourt, Jean; Armenakis, Costas </FONT>
<BR><FONT FACE="Arial">Spatial Database Updating using Active Contours for Multispectral Images: Application with Landsat 7 </FONT>
<BR><FONT FACE="Arial">ISPRS Journal of Photogrammetry and Remote Sensing, Volume 57, pp. 346-355, 2003 </FONT>
<BR><FONT COLOR="#FF0000" FACE="Arial">[Accès restreint]</FONT><FONT FACE="Arial"> </FONT><A HREF="http://www.moivre.usherbrooke.ca/SearchArticles/keywords.aspx?idarticle=94"><U><FONT COLOR="#0000FF" FACE="Arial">[Informations complémentaires]</FONT></U></A><FONT FACE="Arial"> </FONT>
<BR><A HREF="http://www.moivre.usherbrooke.ca/SearchArticles/Files/Restricted/94/60.pdf"><U><FONT COLOR="#0000FF" FACE="Arial">PDF</FONT></U></A>
<BR><FONT FACE="Arial">Jodouin, Sylvie; Bentabet, Layachi; Ziou, Djemel; Vaillancourt, Jean; Armenakis, Costas </FONT>
<BR><FONT FACE="Arial">A Combined Estimation-Deformation Model for Area Detection: Application to Topographic Area Feature Update </FONT>
<BR><FONT FACE="Arial">Actes de Photogrammetric Computer Vision, ISPRS Commission III, Symposium, Volume A, pp. 181-186, Graz, Austria, du 09-09-2002 au 13-09-2002 </FONT></P>
<P><A HREF="http://www.moivre.usherbrooke.ca/SearchArticles/keywords.aspx?idarticle=25"><U><FONT COLOR="#0000FF" FACE="Arial">[Informations complémentaires]</FONT></U></A><FONT FACE="Arial"> </FONT>
<BR><A HREF="http://www.moivre.usherbrooke.ca/SearchArticles/Files/Public/25/24.pdf"><U><FONT COLOR="#0000FF" FACE="Arial">PDF</FONT></U></A>
<BR><FONT FACE="Arial">Bentabet, Layachi; Jodouin, Sylvie; Ziou, Djemel; Vaillancourt, Jean </FONT>
<BR><FONT FACE="Arial">Automated Updating of Road Databases from SAR Imagery: Integration of Road Databases and SAR Imagery information </FONT></P>
<P><FONT FACE="Arial">Actes de 4th International Conference on Information Fusion, Volume WeA1, pp. 3-10, Montréal, Qc, Canada, du 07-08-2001 au 10-08-2001 </FONT></P>
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<P><FONT SIZE=2 FACE="Arial">Cheers</FONT>
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