[Insight-users] Misregistration output difference between ITK 4.2 and 4.4

[Jagjeet Nain]

Hi Brad,
Sorry, I should have explained this already.
Y Axis is Misregistration between a pair of image in "X-direction". One
point represents Mean of Misregistration in X-direction computed from ~150
locations.
X axis is time-series of image pairs.
I could also send similar plot in Y direction, if you want.
BR
Jagjeet


On Tue, Nov 12, 2013 at 2:51 PM, Bradley Lowekamp <brad at lowekamp.net> wrote:

> Hello,
>
> What is the y-axis?
>
> Brad
>
> On Nov 12, 2013, at 8:45 AM, Jagjeet Nain <jagjeet.nain at gmail.com> wrote:
>
>
>
>
> Hi,
> I was trying to run an Image Registration program which uses ITK's Mattes
> Mutual Information method to compute misregistration between an image pair
> and is based on ../Examples/Registration/ImageRegistration4.cxx program.
> Then I linked this program with two different ITKs (3.2 & 4.4) and tried
> running two executable on ~200 image pairs to find misregistration between
> each pair.
>
> I was expecting same output from two ITKs(running system is same, Linux 32
> in both case) but I am bit puzzled to see that there are misregistration
> differences between two ITK versions, Also these differences are not
> negligible they are of the order of 0.1m in a pixel of size 3m. Attached
> are misregistration results from two ITKs.
>
> I guess somebody might have done similar comparison between different ITK
> versions, what is their opinion? Are these differences expected?
> If differences between two ITKs are expected, then which one is better 3.2
> or 4.4?
> Thanks.
> Any help or pointer in this respect is well appreciated.
> BR
> Jagjeet
>
> <MisregistrationDifference3.2Vs4.4.jpg>
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