| 摘要 |
A quality evaluation apparatus comprises light sources for irradiating light on front and back sides of each granular object. A quality evaluation apparatus comprises: granular object holder (1) formed of light transmitting material; light sources (2) for irradiating light on front and back sides of each granular object (i) held by (1); background (3) which establishes references to reflection or transmission light from or through each (i); camera (4) which obtains image signals of reflection and transmission light images from both the sides of the object and slanted light images of any one side or the object; image processor (5) which converts several image signals obtained by (4) into optical information relating to the quality of (i) and converts the optical information into shape information; evaluator (6) which determines the quality of (i) per quality based on the optical information and the shape information obtained by (5); and indicator (7) which displays or prints simultaneously the results of quality evaluation obtained by (6). An independent claim is also included for a method for evaluating the quality of (i) which comprises: irradiating (i) from front and back sides; taking a reflection and a transmission light image from both the sides; obtaining optical information of (i) by image-processing the images; obtaining the shape information of (i) based on the optical information; determining the quality of (i); counting the numbers of (i) per quality and obtaining ratios per quality of (i) against the total number of (i); preparing sample images of (i) per quality by processing the optical information; and displaying or printing the number of (i) per quality, ratios per quality of (i) and the sample images of (i). The quality of (i) is determined as complete and incomplete, based on the optical information and the shape information. |
