[Insight-users] Problem with MultiResMIRegistration

[Luis Ibanez]

Hi Vincente,


Could you please give us more details regarding your observation
that the MutualInformation Metric "doesn't work" in your system.


Please let us know:


  1) Your platform (operationg system, compiler)

  2) ITK version

  3) What do you observe exactly in MI?

      - does it crashes ?
      - does it produces zeros ?
      - does it throws exceptions ?

  4) Have you run any of the other examples that use Mutual
     Information in the Insight/Examples/Registration
     directory ?


This information will help us to track the source of the
problem.



   Thanks



     Luis




-------------------------
Vicente Grau wrote:

> Hi Fong Ming,
> 
> I have a similar problem, and in my case it's just that the Mutual 
> Information Metric does not work. Can you try the Testing programs that 
> use Mutual Information? For example, in program itkAlgorithmsTest, 
> select test number 55 or 67. These tests don't work for me.
> I haven't been able to solve the problem, but in my case I am just using 
> another metric and it is fine.
> 
> Vicente
> 
> Fong Ming Hooi wrote:
> 
>> Hello,
>>
>> I’m having some trouble with the MultiResMIRegistration program. I’m 
>> using the input of BrainWebT1toT2b.txt and have been getting this 
>> corresponding output:
>>
>> Output:
>>
>> Parsing input ...
>>
>> Fixed image filename: 
>> C:\ITKFiles\ITKAppBin2\MultiResMIRegistration\brainweb165a10f17.mha
>>
>> Moving image filename: 
>> C:\ITKFiles\ITKAppBin2\MultiResMIRegistration\brainweb1e5a10f17Rot10Tx15.mha 
>>
>>
>> Permute order: [0, 1, 2]
>>
>> Flip axes: [0, 0, 0]
>>
>> Number of levels: 5
>>
>> Fixed image shrink factors: [4, 4, 1]
>>
>> Moving image shrink factors: [8, 8, 1]
>>
>> Number of iterations: [2500, 2500, 2500, 2500, 2500]
>>
>> Learning rates: [0.0001, 1e-05, 5e-06, 1e-06, 5e-07]
>>
>> Translation scale: 320
>>
>> Output filename: t1tot2.mhd
>>
>> Preprocess the images ...
>>
>> Register the images ...
>>
>> --- Starting level 0
>>
>> No. Iterations: 2500 Learning rate: 0.0001
>>
>> --- Starting level 1
>>
>> No. Iterations: 2500 Learning rate: 1e-05
>>
>> --- Starting level 2
>>
>> No. Iterations: 2500 Learning rate: 5e-06
>>
>> --- Starting level 3
>>
>> No. Iterations: 2500 Learning rate: 1e-06
>>
>> --- Starting level 4
>>
>> No. Iterations: 2500 Learning rate: 5e-07
>>
>> Final parameters: [0, 0, 0, 1, 0, 0, 0]
>>
>> Overall transform matrix:
>>
>> 1 0 0
>>
>> 0 1 0
>>
>> 0 0 1
>>
>> Overall transform offset:
>>
>> [0, 0, 0]
>>
>> Generating output ...
>>
>> The output image is unchanged from the moving image. Does anyone have 
>> any advice as to what I can do to troubleshoot this? I’ve built the 
>> ITK 1.8 framework using cygwin along with FLTK 1.1.4 and Qt 2.3.1 as 
>> well. Also, the Hello World example works fine along with the 
>> Registration examples.
>>
>> Thanks,
>>
>> Fong Ming
>>
>> ------------------------------------------------------------------------
>>
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>> Insight-users at itk.org
>> http://www.itk.org/mailman/listinfo/insight-users
>>  
>>
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