Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00331099" target="_blank" >RIV/68407700:21220/19:00331099 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21230/19:00331099

Výsledek na webu

<a href="https://doi.org/10.1111/cgf.13594" target="_blank" >https://doi.org/10.1111/cgf.13594</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/cgf.13594" target="_blank" >10.1111/cgf.13594</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging

Popis výsledku v původním jazyce

We present an improved way of acquiring spatially varying surface reflectance represented by a bidirectional texture function (BTF). Planar BTF samples are measured as images at several inclination angles which puts constraints on the minimum depth of field of cameras used in the measurement instrument. For standard perspective imaging, we show that the size of a sample measured and the achievable spatial resolution are strongly interdependent and limited by diffraction at the lens' aperture. We provide a formula for this relationship. We overcome the issue of the required depth of field by using Scheimpflug imaging further enhanced by an anamorphic attachment. The proposed optics doubles the spatial resolution of images compared to standard perspective imaging optics. We built an instrument prototype with the proposed optics that is portable and allows for measurement on site. We show rendered images using the visual appearance measured by the instrument prototype.

Název v anglickém jazyce

Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging

Popis výsledku anglicky

We present an improved way of acquiring spatially varying surface reflectance represented by a bidirectional texture function (BTF). Planar BTF samples are measured as images at several inclination angles which puts constraints on the minimum depth of field of cameras used in the measurement instrument. For standard perspective imaging, we show that the size of a sample measured and the achievable spatial resolution are strongly interdependent and limited by diffraction at the lens' aperture. We provide a formula for this relationship. We overcome the issue of the required depth of field by using Scheimpflug imaging further enhanced by an anamorphic attachment. The proposed optics doubles the spatial resolution of images compared to standard perspective imaging optics. We built an instrument prototype with the proposed optics that is portable and allows for measurement on site. We show rendered images using the visual appearance measured by the instrument prototype.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

COMPUTER GRAPHICS FORUM

ISSN

0167-7055

e-ISSN

1467-8659

Svazek periodika

38

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

592-609

Kód UT WoS článku

000462660600039

EID výsledku v databázi Scopus

2-s2.0-85059555293