| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain discriminator for discriminating grains by a simple calculation. SOLUTION: The grain discriminator generates a grain image 18 of a grain 14 by photographing with a photographing device. The discriminator divides the grain image into four regions with a longest main inertia axis S of the grain 14 and a central vertical axis T that crosses and is orthogonal to the center of the axis S, counts the number of pixels in each region, and calculates a maximum pixel number difference by subtracting a smallest pixel number from a largest pixel number in each region. When the maximum pixel number difference is less than a predetermined threshold value, the grain 14 is determined to have a normal grain size. When the maximum pixel number difference is larger the predetermined threshold value, the grain 14 is determined to have an abnormal size. Whether the grain 14 has a normal size can be determined by the simple calculation, specifically by counting the pixel number in each region of the grain image 18 and calculating the maximum image number difference. COPYRIGHT: (C)2004,JPO
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