Question

Which method is not used to determine object orientation?

(a) Equivalent ellipse

(b) Triangulation technique

(c) Structured light method

(d) Light intensity distribution

This question was addressed to me in an interview for job.

This interesting question is from Principle of Working in chapter Machine Vision Systems of Engineering Metrology

Answer 1

Right choice is (b) Triangulation technique

For explanation I would say: Measuring the distance of an object from a vision system camera, determining object orientation, and defining object position are three important tasks performed by machine vision systems. The object orientation can be determined by the methods of an equivalent ellipse, the connecting of three points method, light intensity distribution and structured light method.