The purpose of Hierax software is to enhance the legibility of papyri for text edition and publication. It consists of an image processing tool and an image viewer. To learn more and download the software, click here: https://hierax.ch/
For the technical aspects and evaluation, see V. Atanasiu, I. Marthot-Santaniello, "Legibility Enhancement of Papyri Using Color Processing and Visual Illusions: A Case Study in Critical Vision", accepted for publication by the International Journal on Document Analysis and Recognition (IJDAR) on 2021.03.11. Preprint accessible here.