Information processing apparatus, block detection method, and program

A block detection method comprising the steps of:

• executing Hough transformation on a biometrics image which is image information unique to a living body;
• and
• detecting whether a block having a predetermined shape is included in a Hough space image which is a Hough-transformed biometrics image, and outputting present position information representing a position at which the block is located in the Hough space image when the block is determined to be included in the Hough space image,
• the block including a plurality of unit blocks, each having a predetermined size, which are connected with a predetermined inclination,
• the detecting step detects the block by using a plurality of types of blocks in which the unit blocks are connected in different manners, in which the different manners include (i) a diagonally right down arrangement, (ii) a diagonally right up arrangement, (iii) a horizontal arrangement, and (iv) a vertical arrangement, and
• the detecting step performs detecting processing using the diagonally right down arrangement and the diagonally right up arrangement before using the horizontal arrangement and the vertical arrangement.

A non-transitory computer readable medium having stored thereon a program for causing a computer to achieve:

• a Hough transform function for executing Hough transformation on a biometrics image which is image information unique to a living body;
• and
• a block detection function for detecting whether a block having a predetermined shape is included in a Hough space image which is a Hough-transformed biometrics image, and outputting present position information representing a position at which the block is located in the Hough space image when the block is determined to be included in the Hough space image,
• the block including a plurality of unit blocks, each having a predetermined size, which are connected with a predetermined inclination,
• the detection function detects the block by using a plurality of types of blocks in which the unit blocks are connected in different manners, in which the different manners include (i) a diagonally right down arrangement, (ii) a diagonally right up arrangement, (iii) a horizontal arrangement, and (iv) a vertical arrangement, and
• the detection function performs detecting processing using the diagonally right down arrangement and the diagonally right up arrangement before using the horizontal arrangement and the vertical arrangement.