Dear Everyone:<br><br>I encountered a problem on surface extraction. I want to extract a 3d fetal facial surface from 3D ultrasound image. So I tried two methods to extract 3D surface. First method is, I detect each edge of fetal facial surface from each 2D slice, and then the 3D surface is composed of extracted edges from each slice. Second method is to use vtkContourFilter to extract 3D surface directly and saved as poly data. However, I found the coordinates of poly data from two methods are different. The coordinates of poly data from the first method is relative to original 3D US data, but the coordinates of poly data from the second method are scaled compared with original 3D US data. <br>
<br>But I want to apply the second method to get the same coordinates of poly data as the first method, because the first method is cumbersome to extract 3D surface. So does anyone have any ideas about this problem?<br><br>
Thank you very much for your advice!<br clear="all"><br>-- <br><br> ---------------------<br>Best Regards!<br><br>===============================================<br>Rong Xu, Ph.D Student<br>Ohya Lab<br>Graduate School of Global Information
and Telecommunication<br>Studies (GITS), Waseda University<br>1-6-1 Nishi Waseda, Shinjuku-ku,
Tokyo, Japan (¨“169-8050)<br><br>Tel: +81-80-4208-1207<br>E-mail: <a href="mailto:xurong1981@gmail.com" target="_blank">xurong1981@gmail.com</a><br> <a href="mailto:xurong@fuji.waseda.jp" target="_blank">xurong@fuji.waseda.jp</a><br>
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