comp.lang.idl-pvwave archive
Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado

Home » Public Forums » archive » 3d visualization
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Switch to threaded view of this topic Create a new topic Submit Reply
3d visualization [message #8823] Fri, 25 April 1997 00:00 Go to next message
Nagesh Mallugari is currently offline  Nagesh Mallugari
Messages: 4
Registered: April 1997
Junior Member
I want to know if there are any other ways of visualizing 3D array data
interactively as a volume in idl/PV-Wave other than rendering,shading and
displaying with t3d.

The data is 35 slices of PET with 128 by 128 image size. It has
to be visualized with respect to a co-ordinate system to compare with
another volume set.

Any suggestions or pointers are welcome.

thanks in advance,
Nagesh
Re: 3D Visualization [message #21982 is a reply to message #8823] Fri, 13 October 2000 00:00 Go to previous messageGo to next message
Struan Gray is currently offline  Struan Gray
Messages: 178
Registered: December 1995
Senior Member
Larry Ashim, kashim@earthlink.net writes:

> Is there any better way to do this
> visualization using IDL?

If you are just doing simple depth-cueing (linear fade with
distance) it is built in to the object graphics display routines.
Just turn it on and objects will fade to the background colour
at a rate determined by a simple pair of parameters. See the
manual for IDLgrView for further details.


Struan
Re: 3D Visualization [message #22055 is a reply to message #8823] Mon, 16 October 2000 00:00 Go to previous messageGo to next message
Struan Gray is currently offline  Struan Gray
Messages: 178
Registered: December 1995
Senior Member
Larry Ashim, kashim@earthlink.net writes:

> No, this is not what I want.

If at first you don't succeed.....


> Any other hints out there?

1) Plot in 3D using the z-buffer device.
2) Read the depth info with TVRD(CHANNEL=1, /WORDS)
3) Convert to 8-bit and colour
4) Copy to main display


Struan
Re: 3D Visualization [message #22056 is a reply to message #8823] Mon, 16 October 2000 00:00 Go to previous messageGo to next message
Larry Ashim is currently offline  Larry Ashim
Messages: 4
Registered: July 2000
Junior Member
No, this is not what I want.
I am looking for a technique that truly varies color with depth from the
viewer.
Any other hints out there?

Larry


Struan Gray <struan.gray@sljus.lu.se> wrote in message
news:8s78er$s4e$1@news.lth.se...
> Larry Ashim, kashim@earthlink.net writes:
>
>> Is there any better way to do this
>> visualization using IDL?
>
> If you are just doing simple depth-cueing (linear fade with
> distance) it is built in to the object graphics display routines.
> Just turn it on and objects will fade to the background colour
> at a rate determined by a simple pair of parameters. See the
> manual for IDLgrView for further details.
>
>
> Struan
Re: 3d Visualization [message #75760 is a reply to message #8823] Wed, 04 May 2011 13:27 Go to previous message
Jean[2] is currently offline  Jean[2]
Messages: 41
Registered: October 2010
Member
On May 4, 3:50 pm, David Fanning <n...@idlcoyote.com> wrote:
> Paulo Penteado writes:
>>> Are you talking about something like this:
>
>>>   http://www.idlcoyote.com/coyoteguide/graphics_tips/mesh.html
>
>> The link seems broken. I am guessing it is something like the result
>> of
>
> Sorry. Still getting used to using my own server on my
> Windows machine.
>
>   http://www.idlcoyote.com/graphics_tips/mesh.html
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.idlcoyote.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

David,

Link works and that's exactly what I need. Lovely !

Thanks a lot guys.

Jean
Re: 3d Visualization [message #75764 is a reply to message #8823] Wed, 04 May 2011 12:50 Go to previous message
David Fanning is currently offline  David Fanning
Messages: 11724
Registered: August 2001
Senior Member
Paulo Penteado writes:

>> Are you talking about something like this:
>>
>>   http://www.idlcoyote.com/coyoteguide/graphics_tips/mesh.html
>
> The link seems broken. I am guessing it is something like the result
> of

Sorry. Still getting used to using my own server on my
Windows machine.

http://www.idlcoyote.com/graphics_tips/mesh.html

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Re: 3d Visualization [message #75766 is a reply to message #8823] Wed, 04 May 2011 12:24 Go to previous message
Jean[2] is currently offline  Jean[2]
Messages: 41
Registered: October 2010
Member
On May 4, 3:16 pm, Paulo Penteado <pp.pente...@gmail.com> wrote:
> On May 4, 4:09 pm, Jean <jeanbilh...@gmail.com> wrote:
>
>> But I'm gonn ask also, just in case, if there is a tool in IDL that
>> already provide the possibility to make 3D cut in this 3dImage. For
>> example, I would like to make a selection (in 3d space) and produces a
>> new plot of only this selection.
>
> I cannot figure out what you mean here

Let's suppose my 3d image is an orange, I would like to come with a
knife, cut it in half to be able to see what is going on inside.
Re: 3d Visualization [message #75767 is a reply to message #8823] Wed, 04 May 2011 12:16 Go to previous message
penteado is currently offline  penteado
Messages: 866
Registered: February 2018
Senior Member
Administrator
On May 4, 4:09 pm, Jean <jeanbilh...@gmail.com> wrote:
> But I'm gonn ask also, just in case, if there is a tool in IDL that
> already provide the possibility to make 3D cut in this 3dImage. For
> example, I would like to make a selection (in 3d space) and produces a
> new plot of only this selection.

I cannot figure out what you mean here.
Re: 3d Visualization [message #75769 is a reply to message #8823] Wed, 04 May 2011 12:09 Go to previous message
Jean[2] is currently offline  Jean[2]
Messages: 41
Registered: October 2010
Member
On May 4, 2:57 pm, Paulo Penteado <pp.pente...@gmail.com> wrote:
> On May 4, 3:27 pm, David Fanning <n...@idlcoyote.com> wrote:
>
>> Are you talking about something like this:
>
>>   http://www.idlcoyote.com/coyoteguide/graphics_tips/mesh.html
>
> The link seems broken. I am guessing it is something like the result
> of
>
> ;Make up some images
> image1=dist(100)
> image2=cos(dist(100))
> image3=sin(dist(100))
> image4=image2*image3
>
> ;Show those images, in a stack
> im1=image(image1,zvalue=100)
> im2=image(image2,zvalue=200,/over)
> im3=image(image3,zvalue=300,/over)
> im4=image(image4,zvalue=400,/over)

Like Paulo said, your link David does not work but Paulo, that's
pretty much what I need. Excellent. Thanks a lot.
But I'm gonn ask also, just in case, if there is a tool in IDL that
already provide the possibility to make 3D cut in this 3dImage. For
example, I would like to make a selection (in 3d space) and produces a
new plot of only this selection.

Jean
Re: 3d Visualization [message #75772 is a reply to message #8823] Wed, 04 May 2011 11:57 Go to previous message
penteado is currently offline  penteado
Messages: 866
Registered: February 2018
Senior Member
Administrator
On May 4, 3:27 pm, David Fanning <n...@idlcoyote.com> wrote:
> Are you talking about something like this:
>
>   http://www.idlcoyote.com/coyoteguide/graphics_tips/mesh.html

The link seems broken. I am guessing it is something like the result
of

;Make up some images
image1=dist(100)
image2=cos(dist(100))
image3=sin(dist(100))
image4=image2*image3

;Show those images, in a stack
im1=image(image1,zvalue=100)
im2=image(image2,zvalue=200,/over)
im3=image(image3,zvalue=300,/over)
im4=image(image4,zvalue=400,/over)
Re: 3d Visualization [message #75774 is a reply to message #8823] Wed, 04 May 2011 11:27 Go to previous message
David Fanning is currently offline  David Fanning
Messages: 11724
Registered: August 2001
Senior Member
Jean writes:

> I have a new project that requires 3d visualization and
> reconstruction. For example, I have stack of 2d images that I need to
> put on top of each other and then visualize this stack in 3d. Is there
> any tools in IDL that will do that ? Where should I start looking ?

Are you talking about something like this:

http://www.idlcoyote.com/coyoteguide/graphics_tips/mesh.html

Cheers,

David


--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
  Switch to threaded view of this topic Create a new topic Submit Reply
Previous Topic: Re: Command line display format
Next Topic: Re: legend of polygon

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Wed Oct 08 13:46:26 PDT 2025

Total time taken to generate the page: 0.00483 seconds