I am not ready for such advanced things just yet. I have been looking at the 3D opengl demos and labs.
I am basically thinking about how to read several bmp files into vars like DAT and look at them like the pickcube demo. Move them around with the x,y,z as in the demos. Then zoom in and work with slices. As I picture it I would like to have one 3D view of the cube and then 3 other views of planes drawn from the 3D image. Having 3 lines going through the 3D cube showing the zoom level on each plane with markings on the line and set filters. 2007/3/23, Oleg Kobchenko <[EMAIL PROTECTED]>:
A relevant subject of finding planar paths is called Active Contours and Snakes. Active Contours, Deformable Models, and Gradient Vector Flow http://iacl.ece.jhu.edu/projects/gvf/ A.Blake, M.Isard, "Active Contours" (Introduction, p.17 has just what you ask) http://research.microsoft.com/~ablake/contours/ General http://www.google.com/search?q=active+contours+image http://www.google.com/search?q=active+contour+matlab http://www.google.com/search?hl=en&q=%22image+contour%22+tracking+filetype%3Apdf --- Oleg Kobchenko <[EMAIL PROTECTED]> wrote: > Here's something simple: > > For each plane, > - determine a non-self-intersecting closed path of largest > area that is the boundary between the inner and outer > regions of the body; > - find the center of the path (e.g. center of mass) and > place N points on the path where equiangular rays > from center intersect with it.* > Build OpenGL GL_QUAD_STRIP between each adjacent pairs > of planes matching their 0..N points. > > ______ > * This requires one intersection per ray. > Alternatively, without finding the center, break the > path into N equidistant segments, starting from e.g. (0,max{y}). > > > --- Bj�rn Helgason <[EMAIL PROTECTED]> wrote: > > > I have been working with images in a plane x and y coordinates. > > Thanks to members of this forum I have successfully been able to locate > > objects in that plane and do calculations related to it. > > > > Now I am interested in looking in the z direction. > > > > I have as an example 300 images which are slices through a head from a CT. > > Each slice is a x,y plane and there are objects to be investigated in each > > plane like a slice through the brain. > > > > The same object can then exist in several slices with variations. > > Each slice is interesting but it would be even more interesting to be able > > to put the x,y planes together and be able to look in the z direction and > > also be able to rotate the 3D object. > > > > Then make slices through the cube from various angles. > > > > Is there a tool available in J to do this already? > > > > I have seen various 3D demos but I am not sure if they have been using > > something like 300 BMP files for input. > > > > I do have a Dicom viewer that can look at the images in the way I am > > describing here above and there are a number of tools available to do parts > > of what I want. > > They are all lacking what I have in J in the form of giving a programming > > access to the information I am looking at to combine it with other things of > > interest. ____________________________________________________________________________________ Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit. http://farechase.yahoo.com/promo-generic-14795097 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
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