ENH: Spectra1DImageFilter: populate all spectra lines.
ENH: Spectra1DImageFilter: populate all spectra lines.

KitwareMedical/ITKUltrasound,thewtex/ITKUltrasound,thewtex/ITKUltrasound,KitwareMedical/ITKUltrasound,KitwareMedical/ITKUltrasound,thewtex/ITKUltrasound