How does jpeg-compressor compare to libjpeg-turbo?

jpeg-compressor is much smaller and uses less memory, making it better for embedded systems. However, libjpeg-turbo is faster and supports more JPEG features, so choose based on your need for size versus performance.

Can jpeg-compressor handle progressive JPEG files?

Yes, the decompressor supports progressive JPEGs, but the compressor only creates baseline JPEGs. This means you can read progressive images but not write them with this library.

How to integrate jpeg-compressor into a CMake project?

The source distribution includes a CMakeLists.txt file. Add jpge.cpp and jpgd.cpp to your CMake project, or use the provided configuration to build the library directly.

Is jpeg-compressor safe for user-uploaded images?

Yes, because the decompressor is fuzz-tested with tools like zzuf and AFL, it's resilient to corrupted or malicious inputs, reducing crash risks and security vulnerabilities in applications.

What image formats can jpeg-compressor read as input?

jpeg-compressor itself only handles JPEG compression and decompression. The example uses stb_image to load formats like PNG or BMP, but you'll need to implement your own image loading for non-JPEG sources.

Does jpeg-compressor work on Arduino or similar microcontrollers?

Yes, its low memory usage and streaming decompression make it suitable for microcontrollers, but you must ensure the platform supports C++ compilation and has enough resources for the code size.

Open-Awesome

Jpeg-Compressor

A small, public domain or Apache 2.0 licensed C++ JPEG compression and fuzzed low-RAM decompression codec.

GitHub

249 stars56 forks0 contributors

What is Jpeg-Compressor?

jpeg-compressor is a lightweight, open-source C++ library for JPEG image compression and decompression. It provides a minimal, self-contained codec that writes baseline JPEGs and includes a fuzz-tested decompressor resilient to corrupted inputs. The project solves the need for a reliable, low-memory JPEG solution in embedded systems or applications where larger libraries like libjpeg are impractical.

Target Audience

Developers working on embedded systems, microcontrollers, or applications requiring a small, safe JPEG codec with minimal dependencies. It's also suitable for those needing a public domain or Apache 2.0 licensed alternative to libjpeg.

Value Proposition

Developers choose jpeg-compressor for its exceptional combination of small code size, low memory footprint, and fuzzed decompression safety. Its permissive licensing and single-file design make integration straightforward, while support for streaming decompression enables use in resource-constrained environments where other libraries fail.

Overview

C++ JPEG compression/fuzzed low-RAM JPEG decompression codec with Public Domain or Apache 2.0 license

Use Cases

Best For

Embedded systems requiring JPEG support with limited RAM
Applications needing a fuzz-tested JPEG decompressor for safety-critical inputs
Projects seeking a public domain or Apache 2.0 licensed JPEG codec
Microcontroller firmware that processes JPEG images row-by-row
Tools requiring Libjpeg-compatible quality settings in a minimal codebase
Educational purposes to understand JPEG compression implementation

Not Ideal For

Applications requiring progressive JPEG encoding for web optimization
High-performance image servers needing libjpeg-turbo's speed optimizations
Projects dependent on multi-language bindings (e.g., Python, Node.js) out-of-the-box
Software requiring extensive JPEG standard compliance or vendor support

Pros & Cons

Pros

Minimal Memory Footprint

Consumes less than 64KB of RAM, as stated in the README, making it ideal for embedded systems and microcontrollers with strict memory limits.

Fuzz-Tested Safety

The decompressor has been rigorously tested with zzuf and AFL, ensuring it doesn't crash or have memory safety issues with corrupted inputs, a key feature for handling untrusted data.

Single-File Integration

Compression and decompression are each provided in single C++ source files (jpge.cpp and jpgd.cpp), simplifying code auditing and integration into projects.

Streaming Decompression

Processes JPEGs MCU row by row, avoiding the need to load entire images into memory, which is crucial for resource-constrained environments like 32-bit microcontrollers.

Cons

Baseline-Only Compression

The compressor only writes baseline JPEGs, lacking support for progressive encoding, which is a common requirement in modern web applications for faster image loading.

Limited Performance Optimizations

While it supports SSE2 optionally, it doesn't have the extensive optimizations of libraries like libjpeg-turbo, making it slower for high-throughput or real-time image processing tasks.

Sparse Documentation

The README provides basic usage examples but lacks in-depth API documentation, tutorials, or guidance for complex use cases, which can slow down development in larger projects.

Open Source Alternative To

Jpeg-Compressor is an open-source alternative to the following products:

libjpeg

libjpeg is a library for handling JPEG image files, providing functions for reading, writing, and manipulating JPEG images with compression and decompression capabilities.

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