A Discrete Event
Previous: Introduction
We use a B/W CCD camera and a coordinate measuring machine (CMM) probe with the necessary interface to a Sun Sparcstation as the sensing machines. The part is inspected by the cooperation of the observer camera and the CMM probe; a DEDS is used as the high-level structuring framework for exploring the mechanical part. The sequence of visual events occurring in the system should be observed in order to determine the state of the exploration process. A decision is then made to assert the current state of the observer DEDS automaton. In inspection activities, the DEDS guides the probe to the features where discrepancies occur between the machine part (or a CAD model of it) and the recovered depth/structure data points. The computed structure data from the observer agent are then used to drive the CAD module. Two and three-dimensional visual cues are used to estimate the current inspection state [4]. Examples include: depth from stereo and contours, segmentation data, and boundary information.