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FLIF - Free Lossless Image Format
UPDATE FLIF development has stopped since FLIF is superseded by FUIF and then again by JPEG XL, which is based on a combination of Pik and FUIF. For more information, see Jon's JXL info page or visit the JPEG XL Discord server. FLIF - Free Lossless Image Format FLIF is a novel lossless image format which outperforms PNG, lossless WebP, lossless BPG, lossless JPEG2000, and lossless JPEG XR in terms
Vector animations with Python - __del__( self )
I am a big fan of Dave Whyte’s vector animations, like this one: It was generated using a special animation language called Processing (here is Dave’s code). While it seems powerful, Processing it is not very elegant in my opinion ; this post shows how to do similar animations using two Python libraries, Gizeh (for the graphics) and MoviePy (for the animations). Gizeh and Moviepy Gizeh is a Python
pngquant — lossy PNG compressor
pngquant is a command-line utility and a library for lossy compression of PNG images. The conversion reduces file sizes significantly (often as much as 70%) and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems. Features High-quality palette generation using a combination of vector quantization algorithms. Unique adaptive dithering algor
PNG can be a lossy format
DownloadVersion 1.5.1 Mac OS X 10.8-10.13 Not using a Mac? Check out Color Quantizer (Windows), pngquant (Unix) and TinyPNG (on-line). Snow Leopard (10.6) versionChangelogBugsDonateSource code PNG has been created as a lossless image format, meaning it's supposed to exactly preserve all details of an image, even minuscule ones that are hardly noticeable. Preservation of those tiny details costs a
PNG軽量化の減色と圧縮について | GREE Engineering
このテーブルの番号は 1 Byte になっているため、0-255 の 256 個しか登録できません。そのため、画像で使用されている色が 256 個より多い場合は、なんとかして 256 個にしなくてはいけません。 この「なんとかして 256 色にする」というのが減色処理で、なるべく元の画像からの変化を分からないようにしながら色を減らしていくためのアルゴリズム実装です。（この記事では減色アルゴリズムについての説明は省略します。） テーブルを作成したら、画像のそれぞれのピクセルを RGB 形式からテーブルの何番目の色を使うかに置き換えます。 上図のように、1 ピクセルあたり 24bit 必要だった画像が 1 ピクセルあたり 8bit になったので、データサイズは大体 1/3 になります。 （パレットのデータに最大 3 Byte * 256 = 768 Byte 必要とか、同じように圧縮されないと
pypng
Statistics View statistics for this project via Libraries.io, or by using our public dataset on Google BigQuery README for PyPNG drj@pobox.com INTRODUCTION PNG module for Python. PyPNG is written entirely in Python. PyPNG home page: https://gitlab.com/drj11/pypng/ PyPNG Documentation: https://pypng.readthedocs.io/en/latest/ PyPNG mailing list: https://groups.google.com/forum/#!forum/pypng-users QU
James Tauber : Creating Gradients Programmatically in Python
For various sites I often want to create a narrow gradient image. This site has two, for example, the grey background gradient and the purple header gradient. Rather than having to open up a drawing tool every time I want to create one of these, I thought I'd write a Python script to generate a PNG of a gradient according to declarative specifications. The result is http://jtauber.com/2008/05/grad
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