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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN-US>I looked at the public wiki of itk and found in <o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN-US><a href="http://www.itk.org/Wiki/ITK_Release_4/Enhancing_Image_Registration_Framework">http://www.itk.org/Wiki/ITK_Release_4/Enhancing_Image_Registration_Framework</a><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN-US>the discussion item:<o:p></o:p></span></p><ul type=disc><li class=MsoNormal style='color:windowtext;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo1'><span lang=EN style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Add feature based registration techniques (SIFT (patented?), SURF, etc) <o:p></o:p></span></li></ul><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN>SIFT is only patented in the US (I searched the web and could only find an US patent, please tell me if you can find another one) , but the world is much larger than the US (yes it is) </span><span lang=EN style='font-family:Wingdings'>J</span><span lang=EN> so if you want to use SIFT in Europe it is no problem… So there shouldn’t be a problem implementing SIFT in ITK…<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN>For those who are not confirm with patents, I am a little bit confirm because I currently made one (or I am currently trying to get one, so the patent is not yet accepted):<o:p></o:p></span></p><p class=MsoListParagraph style='margin-bottom:0cm;margin-bottom:.0001pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span lang=EN><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN>There is no “world” patent!!! Such a thing does not exist….You must make it for every country separately…<o:p></o:p></span></p><p class=MsoListParagraph style='margin-bottom:0cm;margin-bottom:.0001pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span lang=EN><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN>And if a patent is confirmed by the US it does not lead to a confirmation in other countries (due to our patent lawyer the US patent is the easiest one to get, it is much harder to get a patent in Europe).<o:p></o:p></span></p><p class=MsoListParagraph style='margin-bottom:0cm;margin-bottom:.0001pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span lang=EN><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN>It is not possible to patent an algorithm (e.g. it would not be possible to patent the FFT), it is only possible to patent an algorithm for a specific problem (e.g. using the FFT for image compression). So as far as I know, SIFT is patented for finding same points in two images. If someone uses SIFT for another problem (I cannot find any example, sry) he can use it without limitations…<o:p></o:p></span></p><p class=MsoListParagraph style='margin-bottom:0cm;margin-bottom:.0001pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span lang=EN><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN>It could be, but I do not know it, that SIFT is only patented for commercial products, not for research purposes<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN>So in my opinion there is no reason why ITK should not include SIFT…<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN>Maybe this is interesting for anyone… Otherwise sorry for spamming<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN>Best regards..<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:0cm;margin-bottom:.0001pt'><span lang=EN>Gerald<o:p></o:p></span></p></div></body></html>