METHOD FOR DETECTING AND METHOD FOR ELIMINATING COLORED PRIMER TUBE FRAGMENTS IN CRUSHED STONES, AND METHOD FOR MANUFACTURING OF CRUSHED STONES IN WHICH RESIDUE OF COLORED PRIMER TUBE FRAGMENTS IS REDUCED

摘要

PROBLEM TO BE SOLVED: To provide technique or the like which detects or eliminates simply and effectively colored primer tube fragments like a Nonel detonating cap or the like which is used for ignition of an explosive in a limestone mining mine or the like. ;SOLUTION: The crushed stones in the course of moving are image-sensed with a color video camera. On the basis of the RGB signal obtained with the camera, H conversion is performed. The obtained H signal is so binarized that the hue region of the fragments can be made an image. By using the image obtained by the binary signal, the fragments left in the crushed stones are detected. By discriminating a part where the fragments are left, the fragments are separated and eliminated.;COPYRIGHT: (C)2001,JPO