Patent ID: 6427128
Filing Date: 2002-07-30
Classification: G01N

Abstract:
A method for evaluating the quality of granular objects, said method comprising the steps of:irradiating said granular objects selectively from a front side and a back side of said granular objects; taking a reflection light image and a transmission light image from the front and back sides of each of said irradiated granular objects; obtaining optical information of each of said granular objects by image-processing said reflection light image and said transmission light image; obtaining shape information of said granular objects based on said optical information; determining the quality of each of said granular objects based on said optical information and said shape information, said quality of granular objects including such quality as complete and incomplete granular objects; counting the numbers of the granular objects per quality and obtaining ratios per quality of the granular objects against the total number of the granular objects; preparing sample images of said granular objects per quality by processing said optical information; and simultaneously displaying or printing the respective numbers of the granular objects per quality, said ratios per quality of the granular objects and said sample images of the granular objects.