Interfaz visual para un Autocolimador Nikon 6D mediante procesamiento de imágenes con precisión sub-píxel: un caso de estudio

C. Schurrer, A.G. Flesia, G. Bergues, G. Ames, L. Canali

Resumen

Este documento tiene el objetivo de describir el potencial de una interfaz visual básica en un Autocolimador del tipo Nikon 6B/6D, para reemplazar al operario en una medición de calidad metrológica. La interfaz visual implementada consta de una cámara con sensor CMOS adosada al ocular del autocolimador, partes posicionales, y un sistema de procesamiento digital de imágenes propio, escrito en lenguaje Matlab OR, que analiza la imagen de la ret́ıcula para detectar la escala y la cruz de medición a nivel sub-ṕıxel. Mediante un experimento controlado, realizado con un nivel electrónico trazable internacionalmente, se obtuvieron, con este sistema, ángulos de cabeceo (αy) con una resolución tres veces mejor que la del instrumento sin interfaz. Este ejemplo sugiere que el valor de 0.06 píxeles para la incertidumbre asociada con la posición sub-píxel de las diferentes líneas que conforman la retícula de medición es realista, y permite seguir trabajando en una interfaz robusta para todos los parámetros angulares posibles de ser medidos por el autocolimador.

Palabras clave

Autocolimador; sensor CMOS; Interfaz visual; precisión subpixel

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1. Electronic Interface With Vignetting Effect Reduction for a Nikon 6B/6D Autocollimator
Guillermo J. Bergues, Luis Canali, Clemar Schurrer, Ana Georgina Flesia
IEEE Transactions on Instrumentation and Measurement  vol: 64  num.: 12  primera página: 3500  año: 2015  
doi: 10.1109/TIM.2015.2444263



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