[Insight-users] ResampleImageFilter Problem!

[frankmiller at jhmi.edu]

Ying,

The "windows picture and fax viewer" is only displaying the pixel array.
It does not take into consideration the origin, spacing, or direction.

The geometry of the itk::Image class can be confusing at first.  Keep
reading the user guide and playing with the examples. In particular, see
figure 4.1 on page 40.

Good luck,

Frank

On Wed, Jan 23, 2008 at 07:04:14PM -0500, Yingli Lu wrote:
> Hi Frank,
> 
> I used "windows picture and fax viewer"  to open it.
> It seems that there should be a transformation that transform from image
> coordinate( origin at the upper left corner, x increasing to the right, y
> increasing to the bottom) to physical coordiante. Tthen, the
> ResampleImageFilter can use. Am I right?
> 
> Thank you,
> 
> 
> On Jan 23, 2008 4:42 PM, <frankmiller at jhmi.edu> wrote:
> 
> > Ying,
> >
> > What program are you using to view the image? Many image viewing
> > programs have the convention of placing the origin at the upper left
> > corner, x increasing to the right, y increasing to the bottom.
> >
> > Frank
> >
> > On Wed, Jan 23, 2008 at 04:28:23PM -0500, Yingli Lu wrote:
> > > Can anybody help me with this problem:
> > >
> > > I just ran the example of "Examples/Filtering/ResampleImageFilter.cxx"
> > at
> > > section 6.9.4 in the Userguide
> > >
> > > But I can't get the same result of Figure 6.40  in the Userguide (where,
> > the
> > > origin is at the lower left corner of the input image, and X coordinate
> > is
> > > horizontal to the right, Y coordinate is vertical to the up direction).
> > >
> > > My result seems to be based on a different coordinate: the origin is at
> > the
> > > upper left corner, and X coordinate is horizontal to the right, Y
> > coordinate
> > > is vertical to the down direction).
> > >
> > > Example code is wrong or Userguide is wrong?
> > >
> > > Thank you,
> > >
> > > Ying
> >
> > > _______________________________________________
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> > > Insight-users at itk.org
> > > http://www.itk.org/mailman/listinfo/insight-users
> >
> >
> 
> 
> -- 
> Yingli Lu
> GE Canada
> 268 Grosvenor, E5-137
> London, ON, N6A 4V2 Canada
> Phone:(519) 646-6000 ext.64626
> Email:yinglilu at gmail.com
>         yingli.lu at ge.com