ULIS, a simple, powerful and lightweitght solution for image processing.

ULIS is a cross-platformed modern C++ library that eases the development of your application alleviating the needs for developing in-house solutions when it comes to imaging.


Build on any desktop platforms with all major compilers.


Multithreading and SIMD support


Build bindings for Python or WASM Web-Assembly


Free access to the source code on request

ULIS logo

ULIS is an acronym that stands for Utility Library for Imaging System. This library was created to answer the specific needs of ILIAD and Odyssey related to the context of raster-based drawing in a 3D environment powered by Unreal Engine.

Features & details

ULIS capabilities:
• Cross-Platform C++14 Library
• Generic digital image processing
• 2D Software rasterizer
• Unlimited image formats (u8, u16, u32, float, double)
• Custom bit-ordered memory layouts
• All Photoshop pixel blending modes + 11 additional modes
• Color models (RGB, HSL, HSV, CMYK, ...)
• Color-managed pipelines, Color Space support (icm profiles and device-independant)
• Optimized algorithms with multithreading
• Optimized algorithms with SIMD Extensions (SSE2)
• Image pools and caches for optimisations
• Memory storage of animated image sequences

Software Requirements Specification (SRS):
• 64bit OS - Linux, Windows or MacOS
• CMake (3.11.4 or greater)
• Git (2.17.0 or greater)
• C++ compiler with C++14 support
• Python (3.7 or greater) available from PATH as "python3" (optional)

Supported Compilers :
• MinGW 64 7.xx
• Clang LLVM xx

Color ModelRgb Lab Gradients

How much is ULIS?

Extended License

✔ For natural persons
✔ For legal entities
✔ For commercial purposes
✔ Technical assistance included
✔ Credits to Praxinos optional




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