I guess the WEBP developers use the same settings like JPEG,
set JPEG encoder to 100% quality means lossy compression, too.
The only difference is that WEBP has an additional lossless compression algorithm, which JPEG has not.
It might be confusing to users that a 100% setting doesn't mean ...
Search found 43 matches
- Mon Aug 18, 2025 10:31 am
- Forum: MP - General Support
- Topic: WEBP
- Replies: 3
- Views: 118
- Tue Aug 12, 2025 11:41 am
- Forum: NConvert
- Topic: XYB color space with JPEGLI ??
- Replies: 7
- Views: 773
Re: XYB color space with JPEGLI ??
A new release of libjxl is in the pipeline. It's just a matter of days.
This will also fix pending bugs in jpegli, incl. bugs related to XYB color space in jpegli.
This will also fix pending bugs in jpegli, incl. bugs related to XYB color space in jpegli.
- Tue Aug 12, 2025 11:14 am
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
Wouldn't it be a better solution to ask the developers of JPEG XL how to modify the image orientation of existing JXL files instead of doing such a hackish approach?
Anybody is allowed to ask questions on the github plattform.
https://github.com/libjxl/libjxl/issues
Anybody is allowed to ask questions on the github plattform.
https://github.com/libjxl/libjxl/issues
- Mon Jul 07, 2025 10:09 am
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
I was living under the impression that it is already finalized.
The format itself is finalized, but the encoder and decoder are still under development... JPEG XL is considered to be in a pre-release state, atm.
It's in a "use at your own risk" state of development. I would check every single ...
- Sun Jul 06, 2025 9:34 pm
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
Wouldn't it be better to wait with mass conversations to JXL until the JPEG XL encoder is finalized?
Are you talking a developer into implementing a feature that is non-standard just to match your personal work flow?
Are you talking a developer into implementing a feature that is non-standard just to match your personal work flow?
- Sun Jul 06, 2025 8:06 pm
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
There is one question that puzzles me. Why not encode the image with the desired orientation in first place?
Why all the hazzle with image orientation tags?
Why not rotate the image accordingly before encoding to JPEG XL?
Why all the hazzle with image orientation tags?
Why not rotate the image accordingly before encoding to JPEG XL?
- Sat Jul 05, 2025 7:26 pm
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
Thats not a proper solution, golemus, imo. When it comes to interoperability with other software that handles JXL files as the standard demands.
Maybe ask a developer of JPEG XL where the orientation flag is located in the bitstream?
Maybe ask a developer of JPEG XL where the orientation flag is located in the bitstream?
- Fri Jul 04, 2025 9:17 am
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
Problem in this case: JPEG XL is free to use, however the JXL format specification is not for free.
- Wed Jul 02, 2025 5:17 pm
- Forum: Closed/Resolved
- Topic: JPEG XL Orientation
- Replies: 26
- Views: 3198
Re: JPEG XL Orientation
The JPEG XL format has its own flag for image orientation. libJXL ignores the image orientation information from the EXIF tag.
Source:
https://github.com/libjxl/libjxl/blob/f88745497118727f861cb00887cadcb395d10f1c/doc/format_overview.md
under section Metadata versus Image Data.
I don't know how ...
Source:
https://github.com/libjxl/libjxl/blob/f88745497118727f861cb00887cadcb395d10f1c/doc/format_overview.md
under section Metadata versus Image Data.
I don't know how ...
- Mon May 12, 2025 1:32 pm
- Forum: NConvert
- Topic: XYB color space with JPEGLI ??
- Replies: 7
- Views: 773
Re: XYB color space with JPEGLI ??
I noticed that.
Maybe the priority isn't high, or the developers assume that JPEG files with XYB are considered experimental and only a few people are using that coding option.
Anyway, in the meantime, until a proper bugfix is in the official code of jpegli,
a quick fix might be disabling color ...
Maybe the priority isn't high, or the developers assume that JPEG files with XYB are considered experimental and only a few people are using that coding option.
Anyway, in the meantime, until a proper bugfix is in the official code of jpegli,
a quick fix might be disabling color ...
- Thu May 08, 2025 1:47 pm
- Forum: Classic - Suggestions
- Topic: jpeg xl CMYK support...?
- Replies: 2
- Views: 330
Re: jpeg xl CMYK support...?
CMYK color space is primarily of interest for printing images. For displaying CMYK images on a monitor they have to be converted to RGB color space for that purpose.
- Thu May 01, 2025 10:01 am
- Forum: MP - Suggestions
- Topic: Better subsampling data
- Replies: 3
- Views: 355
Re: Better subsampling data
Are you sure that JXL (lossy) is always 444?
Raw 420 data consumes 60% of 444 data space. Seems akward if JXL didn't have opportunity to use this.
JPEG XL does use XYB color space by default. 420 subsampling is only defined for YUV color space.
Only legacy JPEG does use YUV color space by ...
- Wed Apr 30, 2025 9:24 am
- Forum: NConvert
- Topic: XYB color space with JPEGLI ??
- Replies: 7
- Views: 773
Re: XYB color space with JPEGLI ??
Ok, but there is a notice in the libjxl that further development of jpegli will happen in the jpegli repository.
https://github.com/libjxl/libjxl/blob/main/lib/jpegli/README.md
Maybe there will backport jpegli development to the libjxl repository.
Incorrect XYB subsampling in cjpegli hasn't ...
https://github.com/libjxl/libjxl/blob/main/lib/jpegli/README.md
Maybe there will backport jpegli development to the libjxl repository.
Incorrect XYB subsampling in cjpegli hasn't ...
- Sun Apr 27, 2025 2:30 pm
- Forum: NConvert
- Topic: XYB color space with JPEGLI ??
- Replies: 7
- Views: 773
Re: XYB color space with JPEGLI ??
Important fix of JPEG with XYB color profile and subsampling is in git now. XYB color subsampling was incorrect in the past.
https://github.com/google/jpegli/pull/130
https://github.com/google/jpegli/pull/130
- Tue Feb 25, 2025 11:00 am
- Forum: Closed/Resolved
- Topic: Quality options for loading/decoding JPEG
- Replies: 15
- Views: 3621
Re: Quality options for loading/decoding JPEG
Yeah,
but the developers of jpegli claim their own jpeg decoder use floating point calculation and conversion to integer only once, so there are fewer rounding errors, which means possibly more accuracy.
https://github.com/google/jpegli#decoder-improvements
I compared decoding existing jpeg ...
but the developers of jpegli claim their own jpeg decoder use floating point calculation and conversion to integer only once, so there are fewer rounding errors, which means possibly more accuracy.
https://github.com/google/jpegli#decoder-improvements
I compared decoding existing jpeg ...