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Tue Apr 8 17:34:44 EDT 2008
gt; index location than the actual pixel value. In that case, you<br>> &=
gt; > probably only need the first half of option (A).<br>> > >=
<br>> > ><br>> > > Regards,<br>> > ><br>> >=
; ><br>> > > Luis<br>> > ><br>> > ><br>> &=
gt; > ------------------------<br>> > > Cameron Burnett wrote:<=
br>> > > > Oh ok. So there is no way to perhaps extract a pixel=
at a certain<br>> > > > physical coordinate, from the ImageSer=
iesReader object ?? I had a look<br>> > > > at the doxygen docu=
mentation for itk::ImageSeriesReader but there wasn't<br>> > > >=
; any method like that.<br>> > > ><br>> > > > The p=
roblem is that I'm doing this with 3D interaction. At the moment I<br>> =
> > > don't have any 2D viewports at all. In order to find a seed =
point, the<br>> > > > only logical thing I could think of was a=
vtkPointWidget. If that<br>> > > > doesn't end up working then=
I'm not sure if it would be possible to do<br>> > > > 3D regio=
n growing at all. Unless I can guess the seed point.<br>> > > >=
<br>> > > > Any ideas??<br>> > > ><br>> > >=
; > Thanks.<br>> > > ><br>> > > ><br>> > &=
gt; ><br>> > > > -------------------------------------------=
-----------------------------<br>> > > > > Date: Mon, 14 Apr=
2008 10:16:44 -0400<br>> > > > > From: bill.lorensen at gmail.=
com<br>> > > > > To: w_e_b_m_a_s_t_e_r_6_9 at hotmail.com<br>&g=
t; > > > > Subject: Re: [Insight-users] Confidence Connected Se=
ed Coordinates<br>> > > > > CC: insight-users at itk.org<br>>=
; > > > ><br>> > > > > Cameron,<br>> > >=
; > ><br>> > > > > The Seed coordinates are in pixels,=
not physical coordinates. IN<br>> > > > > addition, VTK fli=
ps the image, so you will need to flip your Y pixel<br>> > > > =
> coordinate.<br>> > > > ><br>> > > > > We=
should probably add a method to the filters with Seeds to accept<br>> &=
gt; > > > physical coordinates. Please add a feature request in th=
e ITK bug<br>> > > > > tracker.<br>> > > > ><=
br>> > > > > This page explains how to submit a bug:<br>>=
> > > > http://www.itk.org/Wiki/ITK_Procedure_for_Contributing=
_Bug_Fixes<br>> > > > ><br>> > > > > Thanks,<=
br>> > > > ><br>> > > > > Bill<br>> > &=
gt; > ><br>> > > > ><br>> > > > > On Mo=
n, Apr 14, 2008 at 9:56 AM, Cameron Burnett<br>> > > > > <=
;w_e_b_m_a_s_t_e_r_6_9 at hotmail.com> wrote:<br>> > > > > &=
gt;<br>> > > > > > Hi,<br>> > > > > ><b=
r>> > > > > > I'm just wondering about the coordinate sys=
tem of the confidence<br>> > > > connected<br>> > > &g=
t; > > algorithm. I'm using a vtkPointWidget to select a seed point, =
and<br>> > > > according<br>> > > > > > to th=
e point widget, my XY coordinates range from about -45,413<br>> > >=
; > (top-left)<br>> > > > > > to 413,-45 (bottom-right=
).... and also a z coordinate which I've<br>> > > > got as 7.5<=
br>> > > > > > (middle slice).<br>> > > > >=
; ><br>> > > > > > Now, when I plug that into the conf=
idence connected SetSeed()<br>> > method, I<br>> > > > &g=
t; > don't think the two coordinate systems are matching up because my<b=
r>> > > > results<br>> > > > > > are a bit st=
range.<br>> > > > > ><br>> > > > > ><br=
>> > > > > > The following picture is an image of two leg=
s, and you can see the<br>> > > > > > vtkPointWidget bein=
g positioned in the center of the femur.<br>> > > > > ><b=
r>> > > > > > http://img382.imageshack.us/img382/2118/dic=
omimgaw7.jpg<br>> > > > > ><br>> > > > > &=
gt; This is the result of a multiplier of 0.1, followed by a multiplier<br>=
> > > > of 2.<br>> > > > > ><br>> > >=
; > > > http://img397.imageshack.us/img397/9743/outputvtk01multipl=
ierwd7.jpg<br>> > > > > > http://img383.imageshack.us/img=
383/6727/outputvtk2multiplierfs6.jpg<br>> > > > > ><br>&g=
t; > > > > > (Note: I think these may be a bit pixely due to=
the compression on<br>> > > > > > imageshack, but the ac=
tual ones are just 2 solid colours)<br>> > > > > ><br>>=
; > > > > ><br>> > > > > > What I conclude=
from that is that the blue area is in fact the area<br>> > > >=
that has<br>> > > > > > been seeded, not the red area. T=
herefore that is why I believe that<br>> > > > I have<br>> &=
gt; > > > > some sort of problem with the coordinates not match=
ing. What do I<br>> > > > have to do<br>> > > > >=
; > to make sure the point widget and the SetSeed() method both match<br=
>> > up??<br>> > > > > ><br>> > > > >=
; > And I also don't know why there are 2 colours in the vtk file, when<=
br>> > one<br>> > > > > > should obviously be trans=
parent. Is that one easy to answer?<br>> > > > > ><br>>=
; > > > > ><br>> > > > > > Thanks for any =
help,<br>> > > > > > Cameron.<br>> > > > >=
><br>> > > > > ><br>> > > > > ><br>=
> > > > > > ________________________________<br>> >=
> > > > Grab it. You dream job is up for grabs.<br>> > &=
gt; > > > _______________________________________________<br>> =
> > > > > Insight-users mailing list<br>> > > > =
> > Insight-users at itk.org<br>> > > > > > http://www=
.itk.org/mailman/listinfo/insight-users<br>> > > > > ><br=
>> > > > > ><br>> > > ><br>> > > >=
; ------------------------------------------------------------------------<=
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t; > ><br>> > > > ---------------------------------------=
---------------------------------<br>> > > ><br>> > > =
> _______________________________________________<br>> > > >=
Insight-users mailing list<br>> > > > Insight-users at itk.org<br=
>> > > > http://www.itk.org/mailman/listinfo/insight-users<br>&=
gt; ><br>> > ________________________________<br>> > Grab it=
. You dream job is up for grabs.<br>> > _____________________________=
__________________<br>> > Insight-users mailing list<br>> > I=
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