A GUIDE TO FOURIER TRANSFORMATION ON MEASUREMENT

T. Nakanishi, D. Ito, K. Kariya

Abstract

The strict theory of Fourier transformation algorithms is required in the scientific education. However, the intuition sense is also required in the measurement, because the measurement objects have many projective spaces and an appropriate measurement should be carried out on an appropriate projective space. The intuition sense will be requested in the education where not only conceptual lectures but practical examples and applications are given. One of the applications is shown on this report; that is the image processing method. These measurement methods are employed on the industrial site especially to measure something of moving objects, such as the size of the objects. An automobile flow measurement is one of the examples of this method. A vehicle size on a video picture plane appears as brightness distribution, which is one of the projective spaces of the measurement object. Further more, the spatial frequency spectrum of brightness distribution is also a projective space of the object. An appropriate projective space should be selected for the practical measurement.

Keywords

spatial frequency, image processing, non-contact measurement

Download

IMEKO-WC-2000-TC1-P019.pdf

DOI

-

IMEKO TC

TC1 - Education and Training in Measurement and Instrumentation

Back to the proceedings