Measurement of the shape of objects by shape from focus

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00455576" target="_blank" >RIV/68378271:_____/15:00455576 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1117/12.2189187" target="_blank" >http://dx.doi.org/10.1117/12.2189187</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2189187" target="_blank" >10.1117/12.2189187</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the shape of objects by shape from focus

Popis výsledku v původním jazyce

Shape from focus is a method for the accurate measurement of the geometrical shape of objects. The measurement principle is the local focus search. Therefore, the method is suitable only for objects with a texture. The shape of the object is extracted from a series of 2D images. The 2D images are acquired while the distance of the measured object from the objective lens continuously changes. The longitudinal coordinate of the corresponding surface point is determined from the maximum of the focus measure function. The focus measure function expresses the quality of focus in a small image area and is calculated from the intensity values of individual pixels of a CCD camera by means of a focus measure operator. We present experimental results that demonstrate the capability of the proposed measurement method. The influence of illumination on the measurement uncertainty is studied. The comparison of the results for various focus measure operators and various light sources is presented.

Název v anglickém jazyce

Measurement of the shape of objects by shape from focus

Popis výsledku anglicky

Shape from focus is a method for the accurate measurement of the geometrical shape of objects. The measurement principle is the local focus search. Therefore, the method is suitable only for objects with a texture. The shape of the object is extracted from a series of 2D images. The 2D images are acquired while the distance of the measured object from the objective lens continuously changes. The longitudinal coordinate of the corresponding surface point is determined from the maximum of the focus measure function. The focus measure function expresses the quality of focus in a small image area and is calculated from the intensity values of individual pixels of a CCD camera by means of a focus measure operator. We present experimental results that demonstrate the capability of the proposed measurement method. The influence of illumination on the measurement uncertainty is studied. The comparison of the results for various focus measure operators and various light sources is presented.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-12301S" target="_blank" >GA13-12301S: Optické 3D senzory s vysokou informační účinností</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Conference on Optical and Photonic Engineering

ISBN

978-1-62841-684-8

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

"952412-1"-"952412-6"

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Singapore

Datum konání akce

14. 4. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000359674600038