Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging

Result code in 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>
Alternative codes found
RIV/68407700:21230/19:00331099
Result on the web
<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>

Result language
angličtina
Original language name
Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - 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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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