Attribute-preserving gamut mapping of measured BRDFs

Sun, Tiancheng ; Serrano, Ana (Universidad de Zaragoza) ; Gutierrez, Diego (Universidad de Zaragoza) ; Masia, Belen (Universidad de Zaragoza)

Resumen: Reproducing the appearance of real-world materials using current printing technology is problematic. The reduced number of inks available define the printer's limited gamut, creating distortions in the printed appearance that are hard to control. Gamut mapping refers to the process of bringing an out-of-gamut material appearance into the printer's gamut, while minimizing such distortions as much as possible. We present a novel two-step gamut mapping algorithm that allows users to specify which perceptual attribute of the original material they want to preserve (such as brightness, or roughness). In the first step, we work in the low-dimensional intuitive appearance space recently proposed by Serrano et al. [SGM*16], and adjust achromatic reflectance via an objective function that strives to preserve certain attributes. From such intermediate representation, we then perform an image-based optimization including color information, to bring the BRDF into gamut. We show, both objectively and through a user study, how our method yields superior results compared to the state of the art, with the additional advantage that the user can specify which visual attributes need to be preserved. Moreover, we show how this approach can also be used for attribute-preserving material editing.

Idioma: Inglés

DOI: 10.1111/cgf.13223

Año: 2017

Publicado en: COMPUTER GRAPHICS FORUM 36, 4 (2017), 47-54
ISSN: 0167-7055

Factor impacto JCR: 2.046 (2017)

Categ. JCR: COMPUTER SCIENCE, SOFTWARE ENGINEERING rank: 22 / 104 = 0.212 (2017) - Q1 - T1

Factor impacto SCIMAGO: 0.597 - Computer Networks and Communications (Q1) - Computer Graphics and Computer-Aided Design (Q2)

Financiación: info:eu-repo/grantAgreement/EC/H2020/682080/EU/Intuitive editing of visual appearance from real-world datasets/CHAMELEON
Financiación: info:eu-repo/grantAgreement/ES/MINECO/TIN2016-78753-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/TIN2016-79710-P

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Expresión Gráfica en Ing. (Dpto. Ingeniería Diseño Fabri.)
Área (Departamento): Área Lenguajes y Sistemas Inf. (Dpto. Informát.Ingenie.Sistms.)