are you talking about those files?
Maybe it's easier to use Adobe software or to use an exterrnal (command line) tool to convert DNG to other graphics formats…
Seems like there is no public LabVIEW DNG importer/exporter in existence. The developer approach to create one would be:
Or, use the practical user approach that GerdW already suggested: Find a way around converting and/or processing the files externally.