pngquant
mozjpeg
pngquant | mozjpeg | |
---|---|---|
5 | 19 | |
5,028 | 5,366 | |
- | 0.6% | |
5.1 | 4.6 | |
17 days ago | 6 days ago | |
C | C | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
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.
pngquant
-
Random Code Inspiration Volume 2
image-shrinker is a simple, easy to use open source tool for shrinking images. Under the hood it uses pngquant, mozjpg, SVGO, and gifsicle. You can also install these tools individually if you need to compress some images. I often use pngquantafter exporting PNGs for web projects from Figma or similar tools. I literally run it like this:
-
keeping collection size down (for ankiweb) when needing lots of image cards/notes
Searching more I found https://pngquant.org/ which I could add to my bulk workflow to make most png's approach the jpeg size.
-
screen capture/snapshot utility with image optimization support/configurability
But this did prompt me to do some searching, and I see https://pngquant.org/ which seems to achieve jpeg like size reduction while maintaining the file as a png. One difference they note is that this method will typically preserve sharp edges better than jpeg (which is probably a strong plus for my type of use case)
- Ask HN: Small scripts, hacks and automations you're proud of?
-
Optimising hundreds of gifs, offline
If use PNG you can use pngquant 2 for instance. More modern image formats may also compress your images further.
mozjpeg
-
WebP is so great except it's not
[2] https://github.com/mozilla/mozjpeg
-
It's the future – you can stop using JPEGs
It would be nice if the author would add mozjpeg[1] to the comparison. At certain sizes, it can produce smaller sizes than WebP, and because it is still a jpeg, it has a much better compatibility story, which the author alluded to.
[1]https://github.com/mozilla/mozjpeg
-
Random Code Inspiration Volume 2
image-shrinker is a simple, easy to use open source tool for shrinking images. Under the hood it uses pngquant, mozjpg, SVGO, and gifsicle. You can also install these tools individually if you need to compress some images. I often use pngquantafter exporting PNGs for web projects from Figma or similar tools. I literally run it like this:
-
JPEG XL: How It Started, How It’s Going
> MozJPEG is a patch for libjpeg-turbo. Please send pull requests to libjpeg-turbo if the changes aren't specific to newly-added MozJPEG-only compression code.
https://github.com/mozilla/mozjpeg#mozilla-jpeg-encoder-proj...
-
Why there may never be a libjpeg-turbo 3.1
FWIW, Mozilla has been maintaining their own fork for quite a while now[1]
AFAIK most Linux Distros have been using libjpeg-turbo as a drop-in replacement for libjpeg, after some drama in ~2010 where libjpeg came under new management, decided to break ABI/API several times over and add incompatible, non-standard format extensions[2].
[1] https://github.com/mozilla/mozjpeg
[2] https://en.wikipedia.org/wiki/Libjpeg#History
-
Are all JPEG compression implementations the same?
No.
See https://github.com/mozilla/mozjpeg
Also, there is a fairly big problem with JPG that the ‘quality’ setting is not calibrated. That is you might look at one image and think it looks fine (which is subjective, depends on what you want to use the image for…) with a quality of 60%, but then you compress a million images at that rate, delete the originals, then you find that many of them look really awful. Not only that but there are images you could have compressed more and still been happy with the output.
If you are publishing images for the web consider using WebP which is consistently better, well supported now, and has a calibrated quality knob.
-
reduce the size of a bunch of jpg
https://github.com/mozilla/mozjpeg's cjpeg tool is the command line version of the mozjpeg library, itself a fork of libjpeg-turbo. Mozjpeg performs lossless JPEG optimization. There are plenty of others out there.
-
Lossy Image Compression with Dithering
Use the Mozilla JPEG Encoder, which implements several tricks for smaller file size / better visual quality. The result is still JPEG standard compatible that other software can decode.
-
Fighting JPEG Color Banding
Guetzli was already mentioned and roughly does what you are talking about.
MozJPEG [1] includes several quantization tables that are optimized for different contexts (see the quant-table flag and source code for specific tables[2]), and the default quantization table has been optimized to outperform the recommended quantization tables in the original JPEG spec (Annex K).
It's also worth noting that MozJPEG uses Trellis quantization [3] to help improve quality without a per-image brute force quantization table search. Basically rather than determining an optimal quantization table for the image, it minimizes rate distortion on a per-block level by tuning the quantized coefficients.
[1] https://github.com/mozilla/mozjpeg
[2] https://github.com/mozilla/mozjpeg/blob/5c6a0f0971edf1ed3cf3...
[3] https://en.wikipedia.org/wiki/Trellis_quantization
-
FFmpeg now supports JPEG XL
They're still being used. A newer, optimized JPEG encoder, mozJPEG[0], seems to use progressive encoding by default. I suspect with faster internet speeds, most images download and decode so fast that the cool 'enhance' animation doesn't happen anymore.
[0] https://github.com/mozilla/mozjpeg
What are some alternatives?
oxipng - Multithreaded PNG optimizer written in Rust
squoosh - Make images smaller using best-in-class codecs, right in the browser.
3d-game-shaders-for-beginners - 🎮 A step-by-step guide to implementing SSAO, depth of field, lighting, normal mapping, and more for your 3D game.
guetzli - Perceptual JPEG encoder
flameshot - Powerful yet simple to use screenshot software :desktop_computer: :camera_flash:
wazero - wazero: the zero dependency WebAssembly runtime for Go developers
zettelkasten - Creating notes with the zettelkasten note taking method and storing all notes on github
image-actions - A Github Action that automatically compresses JPEGs, PNGs and WebPs in Pull Requests.
dotfiles - ben's dotfiles
bimg - Go package for fast high-level image processing powered by libvips C library
semanticText - Copy paste tool that analyzes the semantic description of all text in the DOM
jpegoptim - jpegoptim - utility to optimize/compress JPEG files