How to reader and decoder 16 bits image?

[marcelovizoni]

I'm trying to read 16 bit png images, but the decoder returns 8 bit image. How can I read and decode 16bit images? even if it's in exr format

[szalpal]

Hi @marcelovizoni !

Unfortunately, DALI currently does not support 16 bit images. This topic has been raised before, thus I'll put this issue on our priority list and update status in this issue. Meanwhile, please refer to #2827 should you like a possible solution, that might work for you now.

[timcogan]

This feature would be greatly appreciated. I was hoping to use DALI for decoding 16-bit J2K images.

[JanuszL]

Hi @timcogan,

The decoding itself is just part of the limitations. Other DALI operators also don't support 16-bit images, so we plan to extend decoders and operators at the same time. Before that, we want to have a good use case that would allow us to prioritize our effort.
Can you share what workflow/use case you have in mind?

[timcogan]

Hi, @JanuszL, thanks for your response. My use case is working with J2K compressed medical images. I have medical image files (i.e. DICOMs) that use J2K to reduce the file size from around ~500MB to ~50MB, but decoding these images can take a fair amount of time on CPUs.

[JanuszL]

Hi @timcogan,

For medical images, you may consider cuCIM, as it provides the ability to provide slinging window reading pattern.