PROBLEM TO BE SOLVED: To provide a fingerprint quality evaluation device capable of accurately evaluating an area appropriate for fingerprint collation and an area inappropriate therefor in a fingerprint image regardless of the fingerprint ridge line shape.SOLUTION: A fingerprint quality evaluation device includes a ridge line width distribution derivation part which provides an evaluation area of a predetermined size in a binarized fingerprint image and calculates a distribution value of ridge line widths in this area. The ridge line width distribution derivation part includes: pixel ridge line width calculating means 13 for calculating a pixel ridge line width distribution calculating means for obtaining the pixel ridge line widths each corresponding to each of the pixels existing in each of the evaluation areas so as to calculate distribution values of the pixel ridge line widths thereof in such a manner that they respectively correspond to one color pixel and the other color pixel in each of the evaluation areas and area distribution value determining means which determines a lower distribution value, selected out of the distribution values respectively corresponding to one and the other color pixels, as an area distribution value indicative of a distribution value corresponding to each of the evaluation areas.COPYRIGHT: (C)2013,JPO&INPIT【課題】指紋画像における指紋照合に適切な領域と不適切な領域とを隆線形状に関わらず正確に評価し得る指紋品質評価装置を提供する。【解決手段】二値化された指紋画像内に、一定サイズの評価領域を設け、この領域内の隆線幅の分散値を算出する隆線幅分散導出部を備えた指紋品質評価装置であって、前記隆線幅分散導出部が、画素隆線幅として算出する画素隆線幅算出手段13と、前記各評価領域内の画素それぞれに対応した前記画素隆線幅を取得しその画素隆線幅の分散値を前記各評価領域内の一方の色画素および他方の色画素それぞれに対応して算出する分散算出手段と、前記一方と他方の各色画素それぞれの分散値の内の値が低い方の分散値を、前記各評価領域に対応した分散値を示す領域分散値として決定する領域分散値決定手段とを備えている。【選択図】図1
