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linuxmint / xviewer

A generic Image viewer
GNU General Public License v2.0
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Problem with viewing .dng images. (took by Mi Drone 4K camera) #71

Open JuliuszJusz opened 5 years ago

JuliuszJusz commented 5 years ago 
 * Xviewer version (1.8.1)
 * Distribution - (Mint 19)

Issue

Transparent opacity checkboard instead of .DNG picture content.

Steps to reproduce Opening any of dng files that I have. All of .DNGs were taken by Mi Drone 4K gimbal camera.

Expected behaviour

Preview of image.

Other information

programmer-ceds commented 3 years ago

I suspect that xviewer will not handle DNG files that contain CFA, rather than RGB, data. I have found (although not exhaustively tested) that xviewer will open DNG files that don't have CFA tags (CFAPlaneColor etc.) but not those that do contain these tags. pix will also not open these files.

Based on the 'magic numbers' DNG files will be recognised as being in TIFF format - which is correct as DNG files are a subset of TIFF files.

RawTherapee seems to open these CFA DNG files.

Hombre57 commented 2 years ago

Camera very often saves several image data in a single file. That's the case for PEF, NEF, CR2 and DNG files. xviewer actually display the thumbnail image in my Pentax's produced DNG file, while a full size version exist (beside the CFA data).

It doesn't find the metadata as well, so that's something that could be corrected (I would set that between bug and feature request, I guess xviewer is not tailored to look into RAW image files).

Is xviewer the right place to correct that or is it derived from another software (i.e. Eye Of Gnome) ?

Also, I'd love to be able to import my DNG files to a specific directory and extract the full size image automatically to another directory. Has xviewer any relation to Pix importer ?