[ITK-users] ERROR: MeanSquaresImageToImageMetric: Too many samples map outside moving image buffer

[elena bresciani]

I get the error immediately after running the script, so I think the
problem is in the transform initialization.
Should I try with itkCenteredTransformInitializer.h
<http://www.itk.org/Doxygen/html/itkCenteredTransformInitializer_8h_source.html>
?


2014-07-23 14:48 GMT+02:00 Bradley Lowekamp <blowekamp at mail.nih.gov>:

> Is this at the first iteration of after a few? Are iterations converging,
> diverging or erratic?
>
> If it's the first it's an indication that initial transform is poor and
> they don't overlap much. There for the results of the transform initializer
> should be evaluated.
>
> If it's after a few iterations, then is the iteration of the metric and
> optimizer needs to be examine. Is the value of the metric correct and
> correlated with the correct solution? Is the step size too big? Would
> smoothing the fixed and moving images smooth optimization? etc?
>
> These registration examples are not designed to be turn key solution, they
> are a stepping stone to learn about the registration framework, and begin
> analyzing the behavior of the components so that a solution to your problem
> can be constructed.
>
> Brad
>
> On Jul 23, 2014, at 8:30 AM, elena bresciani <elena.bresciani87 at gmail.com>
> wrote:
>
> ExceptionObject caught !
>
> itk::ExceptionObject (0x3043350)
> Location: "void itk::MeanSquaresImageToImageMetric<TFixedImage,
> TMovingImage>::GetValueAndDerivative(const ParametersType&,
> itk::MeanSquaresImageToImageMetric<TFixedImage,
> TMovingImage>::MeasureType&,
> itk::MeanSquaresImageToImageMetric<TFixedImage,
> TMovingImage>::DerivativeType&) const [with TFixedImage =
> itk::Image<unsigned char, 2u>; TMovingImage = itk::Image<unsigned char,
> 2u>; itk::MeanSquaresImageToImageMetric<TFixedImage,
> TMovingImage>::ParametersType = itk::OptimizerParameters<double>;
> itk::MeanSquaresImageToImageMetric<TFixedImage, TMovingImage>::MeasureType
> = double; itk::MeanSquaresImageToImageMetric<TFixedImage,
> TMovingImage>::DerivativeType = itk::Array<double>]"
> File: /usr/local/include/ITK-4.5/itkMeanSquaresImageToImageMetric.hxx
> Line: 257
> Description: itk::ERROR: MeanSquaresImageToImageMetric(0x30384c0): Too
> many samples map outside moving image buffer: 4042 / 568832
>
>
> 2014-07-23 13:47 GMT+02:00 Bradley Lowekamp <blowekamp at mail.nih.gov>:
>
>> What is the error you are getting?
>>
>> Brad
>> On Jul 23, 2014, at 6:20 AM, elena bresciani <elena.bresciani87 at gmail.com>
>> wrote:
>>
>> > Hello folks,
>> >
>> > I have a registration problem for you. I'm using the code in the
>> example ImageRegistration5.cxx in order to align image of drugs blisters to
>> assess if they are the same or not.
>> >
>> > The code works well even though for certain images couples I get the
>> error in this message object.
>> > I thought the problem could be the relative difference in images size
>> and tried to pad the smallest one to have the same size as the biggest:
>> same error.
>> > After reading comments on the same topic I tried to add to the code the
>> line
>> >
>> > registration -> SetFixedImageRegion (fixedImage -> GetBufferedRegion());
>> >
>> > again not solving my problem.
>> > Attached you can find example images: while I can register image "1" on
>> image "0", if I try to register "2" on "1" I get the ERROR.
>> >
>> > Any guess?
>> >
>> > Cheers,
>> > Elena
>> >
>> >
>> >
>> > <0.jpg><1.jpg><2.jpg>
>> >
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