Long vol in readers

[kerautret]

PR Description
Add longvol in various readers.
In progress, todo:

• 3dImageViewer
• sliceViewer
• 3dVolViewer
• vol2sdp
• vol2obj
• vol2slice
• vol2raw
• vol2heightfield
• volBoundary2obj

Checklist

• Doxygen documentation of the code completed (classes, methods, types, members...).
• Main tool doxygen documentation (following existing documentation of DGtalTools documentation.
• Check if it follows the tools structure described in CONTRIBUTING.md
• New entry in the ChangeLog.md added.
• Update the readme with potentially a screenshot of the tools if it applies.
• No warning raised in Debug cmake mode (otherwise, Travis C.I. will fail).

[dcoeurjo]

Could yo please update de "-i" description?

I'd need to have a look to the GenericReader with rescale..

[kerautret]

Thanks I forget, that done ;)

[dcoeurjo]

Do you know why importWithValueFunctor documentation is not visible on Dgtal http://dgtal.org/doc/nightly/structDGtal_1_1GenericReader.html ?

[dcoeurjo]

you should add something that the data will be scaled for longvol/dicom/... formats

[kerautret]

done thanks, I continue with other tools...

[dcoeurjo]

otherwise it's fine. thanks;)

[kerautret]

I thinks it is because it not defined in all specialised template (in particular it is not defined in GenericReader< TContainer, 3, DGtal::uint64_t >DGtal). But perhaps we can add an issue to add a ref to the template specialisation.

[dcoeurjo]

"are linearly scaled between 0 and 255" ?

[kerautret]

yes thanks ;)

[kerautret]

@dcoeurjo could we merge ?

[dcoeurjo]

Otherwise, fine for me.. thanks

[dcoeurjo]

please update changelog

[kerautret]

done thanks ;)

[dcoeurjo]

ok thanks. merging