Int. J. Metrol. Qual. Eng.
Volume 7, Number 2, 2016
|Number of page(s)||6|
|Published online||18 May 2016|
Calibration of circular aperture area using vision probe at inmetro
Brazilian National Metrology Institute (INMETRO),
Nossa Senhora das Graças Avenue, 50 Xerém, Duque
de Caxias-RJ, Brazil
2 Fluminense Federal University, Passo da pátria street, 156 – São Domingos, Niterói-RJ, Brazil
⋆ Correspondence: firstname.lastname@example.org
Received: 8 March 2016
Accepted: 10 April 2016
Circular aperture areas are standards of high importance for the realization of photometric and radiometric measurements, where the accuracy of these measures is related to the accuracy of the circular aperture area calibrations. In order to attend the requirement for traceability was developed in Brazilian metrology institute, a methodology for circular aperture area measurement as requirements from the radiometric and photometric measurements. In the developed methodology apertures are measured by non-contact measurement through images of the aperture edges captured by a camera. These images are processed using computer vision techniques and then the values of the circular aperture area are determined.
Key words: Circular aperture area / image metrology / computer vision / image processing
© EDP Sciences 2016
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