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

[Jagjeet Nain]

Hi,
Here is similar plot but in this case Y axis represents mis-registration
between two images in Y direction.
Any idea or thoughts why the misregistration results are different in two
ITKs?
BR
Jagjeet


On Tue, Nov 12, 2013 at 5:05 PM, Jagjeet Nain <jagjeet.nain at gmail.com>wrote:

> 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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