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HIERAX: Software for Enhancing the Legibility of Papyri

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Hierax

The purpose of this software is to enhance the legibility of papyri for text edition and publication. It consists of an image processing tool and an image viewer.

HIGHLIGHTS

Fully automatic image enhancement, which is especially useful for processing image collections.

Multiple enhancement methods, for covering a variety of document and reproduction qualities, tasks, and subjective preferences.

Complementary to other software, such as DStretch and Photoshop.

Open source code.

ENHANCEMENT EXAMPLES

Input papyrus image
Input image
Enhancement by vividness
Vividness
Enhancement by LSV
LSV
Enhancement by vividness negative
Vividness Negative
Enhancement by adapthisteq
Adapthisteq
Enhancement by RGB retinex
Retinex MSRCR-RGB
Enhancement by CIELAB retinex
Retinex MSR-VAB
Enhancement by CIELAB retinex blue negative
Retinex MSR-VAB Blue Negative
For comparison,
enhacement produced by
the DStretch software,
with the option LBK.
Enhancement by DStretch software, option LBK


Image creditsPSI XIII 1298 (15a) r1, detail © Istituto Papirologico Vitelli, Florence, by permission.

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