<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV>GuangHui,</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I don't know of any CBIR systems implemented in MATLAB either, although our classification work has much in common with CBIR.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>We convert (in MATLAB) an image into a vector (about 800 values) in order to extract numerical content descriptors for supervised machine learning. The same features could be used in a CBIR system, however you will have to define the distance metric (based on your application, I'm sure).</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>The feature extraction code is open-sourced and available here:</DIV><DIV><A href="http://cvs.openmicroscopy.org.uk/horde/chora/browse.php?f=OME%2Fsrc%2Fmatlab%2FOME%2F">http://cvs.openmicroscopy.org.uk/horde/chora/browse.php?f=OME%2Fsrc%2Fmatlab%2FOME%2F</A></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Tom</DIV><DIV><BR><DIV><DIV>On Mar 16, 2006, at 6:20 AM, #HU GUANGHUI# wrote:</DIV><BLOCKQUOTE type="cite"><P><FONT size="2">Hi Tom,<BR> <BR> I came across your profile and noticed that content-based image retrieval is one of your interests.<BR> <BR> Currently, I am looking for a CBIRS (query by example) implemented in Matlab, however, there wasn't much luck at Google.<BR> So I was thinking you might be the appropiate person to ask.<BR> <BR> Have you come across such implementation? If so, may I look at the source codes?<BR> Thanks!<BR> <BR> Cheers,<BR> GuangHui</FONT> </P> </BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>