Method for determining object contours - using video camera or ultrasonic emissions to scan object surface, converting received data into binary signals, and displaying object as white on black background to facilitate line by line scanning

摘要

The method involves collecting object (10) data using a scanning system (11), e.g. video camera or ultrasonic, and converting the data into a binary format. The object is then displayed as white on a black background. The monitor image is scanned to detect contrast boundaries, to form contour data. The contour data is in the form of points indicating object surface edges. Consecutive points are joined to form a closed outline of the object. A computer (12) performs the necessary processing involved. ADVANTAGE - Improved recognition of closed contours.