[Insight-developers] ChanAndVese Function: Scalart

[Arnaud Gelas]

Luis,

I guess it was following the LevelSetFunction implementation where all 
computations are done with ScalarValueType (PixelType) and not with 
PixelRealType (defined but not used).

I think it was assumed (at least in the RegionBased version) that the 
input and output level set have float and double pixels.

Both of your suggestions sound good for me. But I think the easiest 
solution is the second one, and in this period it may be preferable, right?

Arnaud

Luis Ibanez wrote:
> Arnaud, Kishore, Alex,
>
> The RegionBasedLevelSet function classes use the type
>
>
>                 ScalarValueType
>
>
> for returning most of the computation of the differential
> equation terms.
>
>
> This type is defined from the PixelType of the input level set.
>
> The type is used for performing floating point computations.
>
> There seems to be an assumption that the input (and output)
> level sets must be images whose pixel types are float or
> double.
>
> However, there is no ConceptCheck associated with this assumption.
>
>
> Could you please verify if this observation is correct ?
>
> and if so,
>
>
>    A) Should we introduce a RealScalarType in order to
>       perform computations ?
>
>       (In which case, we will introduce the corresponding
>        concept checks.)
>
>
>    or
>
>
>    B) Should we require that the input and output level set
>       images use pixel types (float,double) ?
>
>
>
>    Thanks for any advice,
>
>
>
>       Luis
>
>
>