Hi <span class="gmail_quote">Carl,<br></span><br><div><span class="gmail_quote">2007/9/22, Carl Brown <<a href="mailto:cbsled@verizon.net">cbsled@verizon.net</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Is it possible to construct 3D images using GRASS from jpeg sources?</blockquote><div><br>Yes. <br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
CT scans and MRI scans are examples. The images are lossless grayscale jpeg<br>format. (There is a standard called DICOM which would probably be the target<br>of any serious work) Each image represents a "slice" with a known position,
<br>resolution and orientation. A number of slices are spaced at a known<br>incremental spacing in the third dimension. It looks like a perfectly good 3D<br>data source to me!</blockquote><div><br>Import the jpeg images into a XY- Projection. Create a 3d region with
g.region.<br>Then use r.to.rast3 to create a volume map based on the jpeg slices. <br></div>To analyse your volume map, use the r3.out.vtk export module and ParaView<br>which is based on the VTK Tollkit. VTK is designed to visualize and
<br>analyze large volume data (medical MRI scans).<br><br>Best regards<br>Soeren<br><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">In simple terms, all that needs to be done to get started is to stack the
<br>slices into a 3D raster map, so as to be able to render them using NVIZ, for<br>example, or for any other uses that anyone might devise for any other<br>existing GRASS functionality.<br><br>Is anyone playing with this type of application?
<br><br>--<br>Carl Brown<br>Whitefield, NH USA<br><br>_______________________________________________<br>grassuser mailing list<br><a href="mailto:grassuser@grass.itc.it">grassuser@grass.itc.it</a><br><a href="http://grass.itc.it/mailman/listinfo/grassuser">
http://grass.itc.it/mailman/listinfo/grassuser</a><br></blockquote></div><br>