[Insight-developers] add template parameters to optimizer base class

[M Stauffer (V)]

Hi,

Templating the optimizers over a parameter ValueType requires that
transforms have parameters of the same type, which requires templating
TransformBase over parameter value type as well. This is easy enough to
propgate, since we can use the TScalarType, over which Transform and
derived classes are templated, to pass to TransformBase for the
parameter ValueType template parameter.

However, this effects TransformIO and related classes, which use
TransformBase pointers to hold their transform lists. For now I'll just
have these template TransformBase over double, w/out templating the IO
classes themselves. And since Norman is overhauling the TransformIO
method, this should be taken care of there. 

Does this sound reasonable?

Cheers,
Michael 

>-----Original Message-----
>From: insight-developers-bounces at itk.org 
>[mailto:insight-developers-bounces at itk.org] On Behalf Of 
>Johnson, Hans J
>Sent: Wednesday, March 30, 2011 5:22 PM
>To: Luis Ibanez; brian avants; Gaëtan Lehmann
>Cc: ITK
>Subject: Re: [Insight-developers] add template parameters to 
>optimizer base class
>
>Luis,
>
>I would vote for this and propose that the wrapping only use the double
>precision version for backwards compatibility.
>
>Hans
>
>--
>Hans J. Johnson, Ph.D.
>hans-johnson at uiowa.edu
>Assistant Professor of Psychiatry
>University of Iowa Carver College of Medicine
>W278 GH, 200 Hawkins Drive
>
>Iowa City, Iowa 52242
>Phone:  319-353-8587
>
>
>
>
>
>
>
>-----Original Message-----
>From: Luis Ibanez <luis.ibanez at kitware.com>
>Date: Wed, 30 Mar 2011 17:17:33 -0400
>To: brian avants <stnava at gmail.com>, Gaëtan Lehmann
><gaetan.lehmann at jouy.inra.fr>
>Cc: ITK <insight-developers at itk.org>
>Subject: Re: [Insight-developers] add template parameters to optimizer
>base class
>
>Hi Brian,
>
>We should check with Gaetan on the implications
>that this new template parameter may have in the Wrapping...
>
>
>       Luis
>
>
>---------------------------------------------------------------
>------------
>-------------
>On Tue, Mar 29, 2011 at 5:19 PM, brian avants <stnava at gmail.com> wrote:
>> hi everyone
>>
>> itkCostFunction defines the following:
>>
>> class ITK_EXPORT CostFunction:public Object
>> {
>> public:
>>
>> < snip >
>>
>>  /**  ParametersType typedef.
>>   *  It defines a position in the optimization search space. */
>>  typedef double                       ParametersValueType;
>>  typedef Array< ParametersValueType > ParametersType;
>>
>> ....
>>
>> what we'd like to do is define ParametersValueType via a template
>>parameter
>> such that we can use float type.
>>
>> the motivation is to allow us to have Derivatives/Parameters that are
>> float deformation fields or float BSpline parameter images that are
>> then memory mapped to Parameter/DerivativeType arrays.
>>
>> does anyone have any objection?   we'd have to make changes 
>to all the
>> derived classes but these changes should be backward compatible
>> because the default template parameter for ParametersValueType would
>> be double ( as it currently is ).
>>
>> brian
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