[Insight-users] ResampleImageFilter Problem!

[frankmiller at jhmi.edu]

I use a custom written program to view images so I can't help you there.
In the past I have used ImageJ, however I think it displays images with
the origin at the top left as well.

Probably the simplest thing for you to do is to use itk::FlipImageFilter
to reflect the image vertically before you write it.

Frank

On Thu, Jan 24, 2008 at 02:43:46PM -0500, Yingli Lu wrote:
> Hi Frank,
> 
> What viewer do you use? or recommend?
> 
> Thank you,
> 
> On Jan 24, 2008 11:32 AM, <frankmiller at jhmi.edu> wrote:
> 
> > 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
> > > >
> > > > > _______________________________________________
> > > > > Insight-users mailing list
> > > > > 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
> >
> 
> 
> 
> -- 
> 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