Practical Pigment Mixing for Digital Painting

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00352274" target="_blank" >RIV/68407700:21230/21:00352274 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1145/3478513.3480549" target="_blank" >https://doi.org/10.1145/3478513.3480549</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1145/3478513.3480549" target="_blank" >10.1145/3478513.3480549</a>

Result language

angličtina

Original language name

Practical Pigment Mixing for Digital Painting

Original language description

There is a significant flaw in today's painting software: the colors do not mix like actual paints. E.g., blue and yellow make gray instead of green. This is because the software is built around the RGB representation, which models the mixing of colored lights. Paints, however, get their color from pigments, whose mixing behavior is predicted by the Kubelka-Munk model (K-M). Although it was introduced to computer graphics almost 30 years ago, the K-M model has never been adopted by painting software in practice as it would require giving up the RGB representation, growing the number of per-pixel channels substantially, and depriving the users of painting with arbitrary RGB colors. In this paper, we introduce a practical approach that enables mixing colors with K-M while keeping everything in RGB. We achieve this by establishing a latent color space, where RGB colors are represented as mixtures of primary pigments together with additive residuals. The latents can be manipulated with linear operations, leading to expected, plausible results. We describe the conversion between RGB and our latent representation and show how to implement it efficiently. We prove the viability of our approach on the case of major painting software whose developers integrated our mixing method with minimal effort, making it the first real-world software to provide realistic color mixing in history.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

<a href="/en/project/EF16_019%2F0000765" target="_blank" >EF16_019/0000765: Research Center for Informatics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ACM Transactions on Graphics (TOG)

ISSN

0730-0301

e-ISSN

1557-7368

Volume of the periodical

40

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

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UT code for WoS article

000729846700039

EID of the result in the Scopus database

2-s2.0-85127397351