JPEG XL (.JXL) samples?

[blue-j]

I cannot find sample .JXL images ANYWHERE!  Can anyone help?  I'm curious to see the new JPEG XL support in 12.25.

Yours,
J

[StarGeek]

From what I understand, you can convert your regular jpegs to jpegXL (and back again I think?). 

I found this google docs list of programs that can deal with JpegXL, which includes links.  It looks like ImageMagick can create lossless JpegXL with no other options as of yet.  As well as the base cjxl.exe program.

The /r/JpegXL sub-reddit is reasonably active for a small community.

[blue-j]

Thanks so much!  I will create them with imagemagick. - J

[Phil Harvey]

There is a metadata sample (no real image) in the t/images directory of the full ExifTool distribution.  You can use ExifTool to write metadata to this image to generate more samples with various metadata.

- Phil

[blue-j]

Thank you!  Have you only supported the format, or is there also additional metadata related to it that's new?

[Phil Harvey]

It supports EXIF and XMP metadata.  Nothing new.

- Phil

[paolobenve]

I cannot find sample .JXL images ANYWHERE!  Can anyone help?  I'm curious to see the new JPEG XL support in 12.25.

Yours,
J

https://w2w-images.sftcdn.net/image/upload/v1620662834/Ghacks/IMG_20200308_194050.jxl

[blue-j]

Thank you so much!  That's very kind of you to share.  : )

J

[garpin]

You can find few more samples on the JPEG XL info page: https://jpegxl.info / https://jpegxl.info/jxl-art.html

According to https://github.com/w3c/csswg-drafts/issues/4929#issuecomment-718849793: "If the optional Exif (or XMP) metadata says something that conflicts with what the codestream says, then a decoder has to ignore the Exif/XMP"

So, setting Exif or XMP metadata (such as image orientation) may not impact the image, because it uses data in the codestream.