Abstract
This study is concerned with the visual information processing of a robot. When the robot recognizes 3-dimensional objects, it has to detet the edges of the objects in the process of feature extraction.
This paper proposes a new method for the edge detection. The apparatus is composed of a slide projector, a TV camera and a computer. On the slide of the slide projector stripes are printed at regular intervals. The stripes are projected on the objects by the projector to be seen by the TV camera. Where the objets are the regularity of stripe intervals is disturbed and caught by the TV camera. The video signal of the TV camera is transmitted to the computer through the buffer memory that has an A-D converter. The edges of the objects are detected according to the information of the cross ratio which is calculated from the stripe intervals by using the computer.
The result of the experiment shows that the above-mentioned method is applicable to the feature extraction of 3-dimensional objects.
