Image processing apparatus, and image processing program



【課題】複数の粒状パターンによって像を示す画像データを、シンチレータ配置に基づく画像データへ高精度に変換する。 【解決手段】原画像データの各粒状パターンの出力値が大きい順に所定数の画素に対して最大画素値を与えてピーク画素として抽出し低階調値画像を作成し、最大画素値等を有する画素から成るピーク領域を抽出し、低階調値画像の水平方向・垂直方向に、ピーク領域の交差線に対して垂直でピーク領域のピーク画素の位置に稜線を抽出しS102、稜線が交差する交点を、アドレス情報を付与して特定し、交点の周辺領域の出力値が、交点の出力値より大きい場合に、交点を周辺領域の出力値の最大の箇所にアドレス情報を維持したまま再配置させてピーク点として特定しS103、出力値等に基づいて、低階調値画像を構成する各画素に対してアドレス情報を決定し、アドレス情報に基づいて、原画像データに対してアドレス変換を行なうための変換テーブルを作成するS104。 【選択図】図16
PROBLEM TO BE SOLVED: To highly accurately convert image data indicating an image with a plurality of granular patterns into image data based on a scintillator arrangement.SOLUTION: A low gradation value image is created by extracting a predetermined number of pixels by giving a maximum pixel value thereto in an order starting from a largest output value of each granular pattern of source image data, a peak region comprised of pixels each having the maximum pixel value or the like is extracted, and in a horizontal/vertical direction of the low gradation value image, a ridge line is extracted at the position of a peak pixel in the peak region vertical to a cross line of the peak region S102. An intersection where ridge lines cross is specified by imparting address information thereto and in the case where an output value in a region around the intersection is greater than the output value of the intersection, the intersection is rearranged at a position where the output value in the peripheral area is maximum, and specified as a peak point while maintaining the address information S103. On the basis of the output value or the like, address information is determined for each of pixels constituting the low gradation value image and on the basis of the address information, a translation table for performing address translation on the source image data is created S104.




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