Image processing apparatus, and image processing program

画像処理装置、画像処理プログラム

Abstract

【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.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    JP-2005043104-AFebruary 17, 2005Natl Inst Of Radiological Sciences, Shimadzu Corp, 株式会社島津製作所, 独立行政法人放射線医学総合研究所放射線位置検出器の校正方法
    US-4588897-AMay 13, 1986Elscint, Ltd.Gamma camera correction system and method for using the same
    US-4588897-B1April 06, 1993Elscint Ltd
    US-5986266-ANovember 16, 1999Andreaco; Mark S., Rogers; Joel G.Method of calibrating multi-crystal single block radiation detectors

NO-Patent Citations (2)

    Title
    JPN6011033136; F. Habte, P.D. Olcott, C.S. Levin, A.M. Foudray, J.A. Talcott: 'Prototype parallel readout system for position sensitive PMT based gamma ray imaging systems' 2003 IEEE Nuclear Science Symposium Conference Record Vol.3, 200310, p.1891-1894, IEEE
    JPN6011033138; Myung Hwan Jeong, Yong Choi, Yong Hyun Chung, Tae Yong Song, Jin Ho Jung, Kcy Jo Hong, Byung Jun Min: 'Position mapping, energy calibration, and flood correction improve the performances of small gamma c' 2003 IEEE Nuclear Science Symposium Conference Rec

Cited By (0)

    Publication numberPublication dateAssigneeTitle