There are a couple I have in mind. Like many techies, I am a huge fan of RSS for content distribution and XMPP for federated communication.
The really niche one I like is S-expressions as a data format and configuration in place of json, yaml, toml, etc.
I am a big fan of Plaintext formats, although I wish markdown had a few more features like tables.
- The format works for both lossy and lossless compression, depending on the use case and need. Photographs can be encoded in a lossy way much more efficiently than JPEG and things like screenshots can be losslessly encoded more efficiently than PNG.
Someone made a fair point that having a format being both lossy and lossless is not necessarily a great idea. If you download a jpeg file you know it will be compressed, if you download png it will be lossless. Shifting through jxl files to check if it’s lossy or not doesn’t sound very fun.
All in all I’m a big supporter of jxl though, it’s one of the only github repos I actively follow.
Functionally speaking, I don’t see this as a significant issue.
JPEG quality settings can run a pretty wide gamut, and obviously wouldn’t be immediately apparent without viewing the file and analyzing the metadata. But if we’re looking at metadata, JPEG XL reports that stuff, too.
Of course, the metadata might only report the most recent conversion, but that’s still a problem with all image formats, where conversion between GIF/PNG/JPG, or even edits to JPGs, would likely create lots of artifacts even if the last step happens to be lossless.
You’re right that we should ensure that the metadata does accurately describe whether an image has ever been encoded in a lossy manner, though. It’s especially important for things like medical scans where every pixel matters, and needs to be trusted as coming from the sensor rather than an artifact of the encoding process, to eliminate some types of error. That’s why I’m hopeful that a full JXL based workflow for those images will preserve the details when necessary, and give fewer opportunities for that type of silent/unknown loss of data to occur.
While I agree that it’s somewhat bad that there is no distinction between lossless and lossy jxl in the file extension, I think it’s really not a big deal compared to the present situation with jpg/png.
The reason being that if you download a png file you have no idea if its been converted from jpg, if it’s a screenshot of a jpg, or if it’s been subjected to lossy reencoding by a tool or a website upload process.
The only thing you can really do to try and see if the file you’ve downloaded has suffered encoding loss is to do an image search on it and see if there are any better quality versions out there. You’d do the exact same thing with a jxl file.
