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jpeg2png | guetzli | |
---|---|---|
2 | 10 | |
469 | 12,881 | |
- | 0.1% | |
10.0 | 0.0 | |
over 3 years ago | about 1 year ago | |
C | C++ | |
GNU General Public License v3.0 only | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
jpeg2png
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Google Chrome Is Already Preparing To Deprecate JPEG-XL (~3x smaller than JPEG, HDR, lossless, alpha, progressive, recompression, animations)
That's not necessarily the case with the jpeg2png decoder, but it's been a while since I used it, and I'm not able to test right now. The PNG files will be smaller than with the usual JPEG decoding process, at least.
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Losslessly Optimising Images
This tool optimises blocky JPEGs for a better viewing pleasure: https://github.com/victorvde/jpeg2png
> jpeg2png finds the smoothest possible picture that encodes to the given JPEG file.
guetzli
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Jpegli: A New JPEG Coding Library
JPEGLI = A small JPEG
The suffix -li is used in Swiss German dialects. It forms a diminutive of the root word, by adding -li to the end of the root word to convey the smallness of the object and to convey a sense of intimacy or endearment.
This obviously comes out of Google Zürich.
Other notable Google projects using Swiss German:
https://github.com/google/gipfeli high-speed compression
Gipfeli = Croissant
https://github.com/google/guetzli perceptual JPEG encoder
Guetzli = Cookie
https://github.com/weggli-rs/weggli semantic search tool
Weggli = Bread roll
https://github.com/google/brotli lossless compression
Brötli = Small bread
- NASA ICER image compression algorithm as a C library
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26 Additional Web Development Terms You May Not Have Heard Of
A JPEG encoder developed by Jyrki Alakujala, Robert Obryk, and Zoltán Szabadka, and released by Google in 2017. Guetzli specializes in high-end image quality where it is claimed to produce significantly smaller files than prior encoders at equivalent quality, albeit at very low speed. It is named after the Swiss German expression for biscuits, in line with the names of other compression technology from Google. github.com/google/guetzli
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Google Chrome Is Already Preparing To Deprecate JPEG-XL
I'm a huge fan of AV1 for video, but for images JPEG-XL is simply the better codec than AVIF. If you've not actually looked closely at a comparison and are just on the side of AVIF in this debate because it's based on AV1 (and maybe you hate HEVC / HEIC), I'd urge you to look closer. Jpeg XL is pretty unrelated to Jpeg, Jpeg 2000 and Jpeg XR and instead a successor of Google Guetzli, FLIF and newer research.
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Losslessly Optimising Images
I've never had much luck using jpegoptim. In most cases it's only removing the metadata, which isn't much on high-res files.
Guetzli is nice, if you don't have too many images to recompress (quite slow): https://github.com/google/guetzli
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Downscaling VS Compression
If you're going for full re-encoding, it might help to decode the current JPEG with https://github.com/google/knusperli ... but if you re-JPEG that you might have second-order artifacts. Give it a try. Then compress with https://github.com/google/guetzli
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Guetzli vs. MozJPEG
You know. I was actually quite annoyed ( to say the least ) with the post. For one the post is lacking a date, and you have to search yourself it was published in April 2017. And without a date the article is completely lacking context because Guetzli [1] hasn't been worked on for 5 years. And as [2] mentioned its work and derivative was ultimately merged into JPEG XL, which is a very decent image format. ( People should definitely check out JPEG XL if it is not on your radar yet )
But then I notice it was Dan luu who submitted it, which likely means there must be something much deeper than is what is shown on the surface. So what is the context here ?
[1] https://github.com/google/guetzli
[2] https://news.ycombinator.com/item?id=30622303
- Mishaal Rahman on Twitter: "Samsung, MediaTek, and Google have enabled AV1 decode support in their chipsets, making Qualcomm the biggest holdout. I'm hoping that the next Snapdragon 8 series chipset brings AV1 decode support. Wishful thinking? Maybe."
- Guetzli – Perceptual JPEG Encoder
What are some alternatives?
ImageOptim-CLI - Make optimisation of images part of your automated build process
mozjpeg - Improved JPEG encoder.
shrivel - Command line wrapper utility to shrink a path of images for web based on external tools.
zopfli - Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression.
PNG-spec - Maintenance of the PNG specification
Zpng - Better lossless compression than PNG with a simpler algorithm
smlr - Re-encode jpeg images with no perceivable quality loss.
oxipng - Multithreaded PNG optimizer written in Rust
libavif - libavif - Library for encoding and decoding .avif files