RelightLab Visual Computing Lab - ISTI - CNR

RelightLab is a library and set of tools designed to create and visualize relightable images (RTI), enabling users to manipulate lighting conditions in digital representations of objects. The software supports advanced algorithms, including Polynomial Texture Mapping (PTM), Hemispherical Harmonics (HSH), Principal Component Analysis (PCA) combined with Radial Basis Function (RBF), YCC, and Bilinear interpolation, offering high fidelity and flexibility for different use cases.

Key features include a web-based viewer using WebGL for real-time rendering of RTI files, support for multiresolution tiled viewing formats such as DeepZoom, Google Maps, and IIIF, and tools for processing image stacks into relightable formats. The package also includes command-line utilities for converting PTM files to the Relight format and integrating with libvips for generating pyramidal image formats.

Ideal for researchers, museums, and cultural heritage institutions, RelightLab enables the creation of interactive visualizations that allow users to explore artifacts under varying lighting conditions. This capability enhances the study and presentation of cultural objects by providing detailed surface appearance modeling and rendering capabilities. The software can be installed via winget.