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dropbox/leptonArchived

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View on GitHub↗
4,997 Stars·347 Forks·C++·Apache-2.0·9 Aufrufeblogs.dropbox.com/tech/2016/07/lepton-image-compression-saving-22-losslessly-from-images-at-15mbs↗

Lepton

Lepton ist ein spezialisiertes Tool und Dateiformat für die verlustfreie Komprimierung und effiziente Speicherung von JPEG-Bilddaten. Es fungiert als verlustfreier Kompressor und Speicheroptimierer, der Dateigrößen reduziert, ohne die ursprünglichen Pixeldaten zu verändern, und so eine bitgenaue Rekonstruktion der Bilder garantiert.

Das Projekt konzentriert sich auf die Reduzierung von Speicherplatz- und Bandbreitenbedarf für digitale Bildarchive. Es bietet Funktionen für die Komprimierung und Dekomprimierung von JPEG-Dateien, um eine qualitativ hochwertige Bildspeicherung bei minimalem Daten-Footprint zu gewährleisten.

Die Implementierung nutzt verschiedene Entropiekodierungs- und Datenverarbeitungstechniken, darunter arithmetische und Huffman-Kodierung, prädiktive Modellierung sowie stream-basierte Verarbeitung. Zudem integriert es optimierte Array-Operationen für die Verarbeitung großer Bilddatenblöcke.

Features

  • JPEG Lossless Compressors - Functions as a specialized tool for the lossless compression of JPEG images.
  • JPEG Format Decoders - Restores compressed files to their original JPEG format without any data loss.
  • JPEG Image Compression - Provides lossless compression for JPEG files to reduce storage and bandwidth usage.
  • Storage Optimizers - Acts as a storage optimizer to decrease disk space and network bandwidth for image archives.
  • Lossless Compression - Implements image compression that allows for perfect original quality reconstruction.
  • Lossless Image Formats - Introduces a specialized file format for storing JPEG data more efficiently with bit-perfect reconstruction.
  • Digital Archives - Optimizes the storage of large JPEG collections while ensuring bit-perfect recovery.
  • Arithmetic Coding - Implements arithmetic coding to achieve higher compression density for JPEG data.
  • Image Delta Encoding - Utilizes predictive modeling to encode only the differences between predicted and actual symbol values.
  • Network Data Compression - Reduces the amount of data transferred over networks by compressing JPEG images.
  • Huffman Coding Implementations - Uses Huffman coding for frequency-based bit reduction in the image compression process.
  • Arithmetic Coding Implementations - Employs integer-based arithmetic coding to ensure precise, bit-perfect reconstruction across different hardware.

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Häufig gestellte Fragen

Was macht dropbox/lepton?

Lepton ist ein spezialisiertes Tool und Dateiformat für die verlustfreie Komprimierung und effiziente Speicherung von JPEG-Bilddaten. Es fungiert als verlustfreier Kompressor und Speicheroptimierer, der Dateigrößen reduziert, ohne die ursprünglichen Pixeldaten zu verändern, und so eine bitgenaue Rekonstruktion der Bilder garantiert.

Was sind die Hauptfunktionen von dropbox/lepton?

Die Hauptfunktionen von dropbox/lepton sind: JPEG Lossless Compressors, JPEG Format Decoders, JPEG Image Compression, Storage Optimizers, Lossless Compression, Lossless Image Formats, Digital Archives, Arithmetic Coding.

Welche Open-Source-Alternativen gibt es zu dropbox/lepton?

Open-Source-Alternativen zu dropbox/lepton sind unter anderem: mozilla/mozjpeg — Mozjpeg is a high-performance C library for encoding, decoding, and transcoding JPEG images. It serves as a… flif-hub/flif — FLIF is a lossless image format and compression tool designed for high fidelity image archiving. It reduces file sizes… oxipng/oxipng — Oxipng is a high-performance command-line utility written in Rust designed for lossless PNG image optimization and… phoboslab/qoi — QOI is a lossless image codec and encoding standard designed for high-speed compression and decompression of raw pixel… libjpeg-turbo/libjpeg-turbo — libjpeg-turbo is a high-performance image codec library used for encoding and decoding JPEG images. It serves as a… nailperry-zd/the-economist — This project is a digital magazine archiver and downloader designed to retrieve historical magazine editions from…

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