IMAGE COLLATION METHOD, IMAGE PROCESSING SYSTEM, AND PROGRAM

• Main Authors: KONNO MEGUMI, NAKAGATA SHOHEI, TANAKA RYUTA
• Format: Patent
• Language: English; Japanese
• Published: 30.07.2015
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

PROBLEM TO BE SOLVED: To narrow down to a feature point of an object of image collation.SOLUTION: An image processor performs the following processing about a first feature point pair among generated first pair candidates and one or more of second feature point pairs. That is, a first vector is a vector connecting a first feature point of the first feature point pair and a first feature point of the second feature point pair. A second vector is a vector connecting a second feature point of the first feature point pair and a second feature point of the second feature point pair. At that time, the image processor determines the first feature point to be eliminated from the first pair candidates on the basis of a result of comparison between an angle formed by the first vector and the second vector and a prescribed angle. In addition, the image processor collates a first image with a second image on the basis of feature point pairs included in second pair candidates obtained by excluding the first feature point pair determined to be eliminated from the first pair candidates. 【課題】画像照合の対象の特徴点を絞り込む。【解決手段】画像処理装置は、生成された第１のペア候補のうちの第１の特徴点ペアに対し、１つ以上の第２の特徴点ペアについて以下の処理を行う。すなわち、第１のベクトルは、第１の特徴点ペアの第１の特徴点と第２の特徴点ペアの第１の特徴点とを結ぶベクトルとする。第２のベクトルは、第１の特徴点ペアの第２の特徴点と第２の特徴点ペアの第２の特徴点とを結ぶベクトルとする。このとき、画像処理装置は、第１のベクトルと第２のベクトルとのなす角度と所定の角度との比較の結果に基づき、第１のペア候補から削除する第１の特徴点ペアを判定する。また、画像処理装置は、第１のペア候補から、削除すると判定された第１の特徴点ペアを除いた第２のペア候補に含まれる特徴点ペアに基づき第１の画像と第２の画像との照合を行う。【選択図】図１