GRAIN DIAMETER MEASUREMENT APPARATUS, METHOD AND PROGRAM

To provide a grain diameter measurement apparatus, method and program which can measure a grain diameter by recognizing only an object appearing on an upper part when the plurality of objects are piled up without extracting the spherical objects.SOLUTION: A grain diameter measurement apparatus D according to the present invention comprises: an imaging unit 1 which generates an image by imaging a plurality of spherical objects that are piled up; a binarizing processing unit 34 which generates a binarized image by binarizing the image generated by the imaging unit 1 on the basis of a luminance value; an extraction processing unit 38 which extracts a bright region in which the diameter of the bright region based on an area is within a prescribed range, and the circularity of the bright region is greater than a prescribed first threshold while the circularity of the bright region is greater than a prescribed second threshold from one or the plurality of bright regions in the binarized image generated by the binarizing processing unit 34; and an output unit 5 which outputs the diameter of the bright region extracted by the extraction processing unit 38 as the grain diameter of the object corresponding to the bright region extracted by the extraction processing unit 38.SELECTED DRAWING: Figure 1 【課題】本発明は、球形状の物体を抜き取ることなく、複数の前記物体が堆積している場合に、上部に表出した前記物体のみを認識して粒径を測定できる粒径測定装置、該方法および該プログラムを提供する。【解決手段】本発明の粒径測定装置Ｄは、堆積された、球形状の複数の物体を撮像して画像を生成する撮像部１と、撮像部１で生成した画像を、輝度値に基づき２値化して２値化画像を生成する２値化処理部３４と、２値化処理部３４で生成した２値化画像における１または複数の明領域の中から、面積に基づく前記明領域の径が所定の範囲内であって、かつ、前記明領域の真円度が所定の第１閾値より大きく、かつ、前記明領域の円形度が所定の第２閾値より大きい前記明領域を抽出する抽出処理部３８と、抽出処理部３８で抽出した明領域の前記径を、抽出処理部３８で抽出した明領域に対応した物体の粒径として出力する出力部５とを備える。【選択図】図１