[Insight-users] Re: getting pixel values from 3d image

[Luis Ibanez]

Hi Sharad,

Please the following material


1) ITK Software Guide

     http://www.itk.org/ItkSoftwareGuide.pdf

     Chapter on the Image class.
     Sectino 4.1, pdf-page 61 to 69.

You will find here that the spacing array indicates the pixel
separation along each dimension, not in-between every
consecutive slice in a 3D image. You will also find instructions
on how to access and how to change pixel data.



2) The Introductoy tutorial to ITK

http://www.itk.org/CourseWare/Training/GettingStartedI-WebPage/index.htm



3) The Tutorial on how to convert ITK image
    to VTK image, and viceversa.

http://www.itk.org/CourseWare/Training/GettingStarted-II.pdf





Please let us know if you have further questions.


    Thanks


      Luis


-------------------------------
sharad at hermes.eng.fsu.edu wrote:

> hi Luis
> if you remember i was stacking 2d images to get an 3d image.i have a
> question regarding getting data from 3d image. i am basically getting 2d
> fluorescent images of micro beads(fluorescent) in a micro channel. so  i
> want to track the bead once i get an 3d image which is an vtk image. so i 
> wanted to know if there is any way i could get the intensity values or
> the pixel data or the (x,y,x) of a specific bead from the 3d vtk image or 
> can the 3d vtk imag e be converted into different format by which i can
> read the pixel(or voxel) values. 
> 
> also i asked you before how to set the spacing between images and you
> suggested 
> following(below the next line) .is it same even if my spacing between
> each image is constant . do i need to define an array for spacing between 
> each image? 
> 
> *******************
> 
> Your pipeline should look like:
> 
> 
>    ImageSeriesReader---->> ChangeInformationFilter---->>> etc
> 
> 
> in the ChangeInformationImageFilter you should invoke the
> method:
> 
>                  SetOutputSpacing()
> 
> and feed it with an array that has the correct spacing values.
> 
> ***********************
> thanks a lot for your time
> 
> regards
> sharad
> 
> 
>