FOREIGN MATTER REMOVING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a foreign matter removing apparatus for calculating the brightnesses of the respective visible light regions and a near infrared light regions of aggregate and another foreign matter and comparing the respective brightness increase ratios or brightness differences to detect and remove the foreign matter other than the aggregate. SOLUTION: The foreign matter removing apparatus is constituted of at least an illumination means for illuminating a fed material to be sorted, a photographing means for photographing the illuminated material to be sorted, an image processing means for calculating the brightness increase ratios or brightness differences of the respective visible light region brightnesses and near infrared light region brightnesses of the aggregate and foreign matter in the material to be sorted on the basis of the photographed image, a detection means for issuing the removal signal of the foreign matter in a case that the brightness increase ratios or brightness differences become a reference value and a removal means for removing the foreign matter becoming the reference value or more in the brightness increase ratios or the bright differences according the removal signal. COPYRIGHT: (C)2008,JPO&INPIT