Abstract: A quality evaluation method for granular objects includes the steps of: irradiating objects from a front side and a back side; taking a reflection light image and a transmission light image from both the front and back sides of the objects; obtaining optical information of the objects by image-processing the reflection and transmission light images; obtaining shape information of the objects based on the optical information; determining the quality of each of the objects based on the optical information and the shape information; and counting the numbers of objects per quality and obtaining ratios of the objects per quality against the total number of objects. The data from the front and the back sides of the granular object are analyzed to enhance the precision of the results of the quality analysis, and in particular, to enhance the precision in detecting cracks.

Abstract: Raw wheat grains are polished after being subjected to a first water addition and being tempered, and the polished wheat grains are ground after being subjected to a second water addition and being tempered. The first water addition is to cause the raw wheat grains to have a water content of 12-14%. The tempering of the raw wheat grains is performed for 16-36 hours so that the water sufficiently penetrate into the inside of the raw wheat grains. The method of flouring includes the steps of measuring a water content of the flour obtained by the grinding of the grains, comparing the amount of the measured water content with a predetermined target water content of the flour, and adjusting the amount of water to be added during the second water addition if there is a difference between the measured water content and the predetermined target water content.