Vše

Co hledáte?

Vše
Projekty
Výsledky výzkumu
Subjekty

Rychlé hledání

  • Projekty podpořené TA ČR
  • Významné projekty
  • Projekty s nejvyšší státní podporou
  • Aktuálně běžící projekty

Chytré vyhledávání

  • Takto najdu konkrétní +slovo
  • Takto z výsledků -slovo zcela vynechám
  • “Takto můžu najít celou frázi”

Camera calibration method of optical system for large field measurement of hot forgings in heavy industry

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F19%3APU133153" target="_blank" >RIV/00216305:26210/19:PU133153 - isvavai.cz</a>

  • Výsledek na webu

    <a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11056/1105635/Camera-calibration-method-of-optical-system-for-large-field-measurement/10.1117/12.2527693.full?SSO=1" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11056/1105635/Camera-calibration-method-of-optical-system-for-large-field-measurement/10.1117/12.2527693.full?SSO=1</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1117/12.2527693" target="_blank" >10.1117/12.2527693</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Camera calibration method of optical system for large field measurement of hot forgings in heavy industry

  • Popis výsledku v původním jazyce

    During the manufacturing process of heavy forgings, simple contact measuring techniques are still used to check the dimensions, therefore an optical measuring system is in demand. In this paper, a camera calibration method for the passive measuring system, which is being developed in collaboration with an industrial partner, is proposed. Our approach is based on space resection and works with robust coded targets, which are distributed in the field of view. The coordinates of targets are measured using TRITOP (GOM) measuring system. This solution allows to build a large calibration field, without a need of large calibration objects. The camera calibration works in 2 steps - at first, the intrinsic parameters of the camera, including lens distortion, are calibrated. These parameters are considered as stable, due to the use of special camera covers. Multi-image version of the calibration method and dense field of calibration targets are used. The second step is performed from every image and employs a single-image extrinsic camera parameters calibration method. Only a few coded calibration targets, mounted on stable objects in the scene, are required. The calibration method was tested in industrial conditions. The method showed great results, the average reprojection error was under 0.1 px. The effect of thermally affected zone on the calibration process is discussed.

  • Název v anglickém jazyce

    Camera calibration method of optical system for large field measurement of hot forgings in heavy industry

  • Popis výsledku anglicky

    During the manufacturing process of heavy forgings, simple contact measuring techniques are still used to check the dimensions, therefore an optical measuring system is in demand. In this paper, a camera calibration method for the passive measuring system, which is being developed in collaboration with an industrial partner, is proposed. Our approach is based on space resection and works with robust coded targets, which are distributed in the field of view. The coordinates of targets are measured using TRITOP (GOM) measuring system. This solution allows to build a large calibration field, without a need of large calibration objects. The camera calibration works in 2 steps - at first, the intrinsic parameters of the camera, including lens distortion, are calibrated. These parameters are considered as stable, due to the use of special camera covers. Multi-image version of the calibration method and dense field of calibration targets are used. The second step is performed from every image and employs a single-image extrinsic camera parameters calibration method. Only a few coded calibration targets, mounted on stable objects in the scene, are required. The calibration method was tested in industrial conditions. The method showed great results, the average reprojection error was under 0.1 px. The effect of thermally affected zone on the calibration process is discussed.

Klasifikace

  • Druh

    D - Stať ve sborníku

  • CEP obor

  • OECD FORD obor

    10306 - Optics (including laser optics and quantum optics)

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/TJ01000268" target="_blank" >TJ01000268: Vývoj optického systému pro automatizované měření rotačních výkovků</a><br>

  • Návaznosti

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

Ostatní

  • Rok uplatnění

    2019

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název statě ve sborníku

    Optical Measurement Systems for Industrial Inspection XI

  • ISBN

    9781510627918

  • ISSN

    0277-786X

  • e-ISSN

  • Počet stran výsledku

    12

  • Strana od-do

    1-12

  • Název nakladatele

    SPIE

  • Místo vydání

    Munich, Germany

  • Místo konání akce

    Mnichov

  • Datum konání akce

    24. 6. 2019

  • Typ akce podle státní příslušnosti

    WRD - Celosvětová akce

  • Kód UT WoS článku

    000502140100094