PROBLEM TO BE SOLVED: To provide a size measuring device capable of measuring a size of a measuring object without carrying an object having a known length.SOLUTION: Size measurement processing performed by a size measuring device comprises the steps of: holding reference shape information associated with a shape of a reference finger site including fingers and nails extracted from an image captured beforehand and size information indicating an actual size of the shape of the reference finger site and detecting finger shape information associated with a shape of a finger site including the fingers and the nails from the captured image (102) calculating similarity between the shape of the reference finger site and the shape of the finger site on the basis of the reference shape information and the finger shape information detected from the captured image (110) and, in a case where the similarity calculated is a value indicating that the shape of the reference finger site and the shape of the finger site are similar to each other, (112), calculating an actual size of a measuring object on the basis of a size of the shape of the finger site on the captured image, the size of the measuring object on the captured image and the actual size of the shape of the reference finger site (118).COPYRIGHT: (C)2013,JPO&INPIT【課題】既知の長さの物体を持ち運ぶことなく、測定対象物のサイズを得ることができるサイズ測定装置を提供する。【解決手段】予め撮影した画像から抽出された指及び爪を含む基準指部位の形状に関する基準形状情報と、基準指部位の形状の実サイズを表すサイズ情報と、を保持しておき、撮影画像から指及び爪を含む指部位の形状に関する指形状情報を検出し(102)、基準形状情報と撮影画像から検出された指形状情報とに基づいて、基準指部位と前記指部位の形状の類似度を算出し(110)、算出された類似度が、基準指部位と指部位の形状が類似していることを表す値である場合に(112)、指部位の形状の撮影画像上におけるサイズ、測定対象物の撮影画像上におけるサイズ、及び基準指部位の形状の実サイズに基づいて、測定対象物の実サイズを算出する(118)。【選択図】図4
