Practical Pigment Mixing for Digital Painting

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Practical Pigment Mixing for Digital Painting

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Practical Pigment Mixing for Digital Painting

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/EF16_019%2F0000765" target="_blank" >EF16_019/0000765: Výzkumné centrum informatiky</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

ACM Transactions on Graphics (TOG)

ISSN

0730-0301

e-ISSN

1557-7368

Svazek periodika

40

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000729846700039

EID výsledku v databázi Scopus

2-s2.0-85127397351