Method and apparatus for character recognition

Claim 2

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks characterizing said character; converting the image of marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; and discriminating said character by comparing the image information of said marked portions with standard information relating to standard image patterns stored in advance, wherein said marks are formed on said character in the outline of a polygon and said character recognition is conducted by comparing the coordinates of the center of gravity of such polygon formed by the arrangement of said marked portions to the coordinates of the center of gravity of marks formed on various standard characters to select a standard character corresponding to said optically scanned character.

Claim 3

A character recognition method as set forth in claim 1, wherein said plurality of marks is composed of three circles which are arranged to form an isosceles triangle.

Claim 4

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks composed of three circles which are arranged to form an isosceles triangle characterizing said character; converting the image of said marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; and discriminating said character by comparing the image information of said marked portions with standard information relating to standard image patterns stored in advance, wherein said character recognition is conducted on the basis of the coordinates of the center of gravity which is determined from the positional coordinates of the three marks forming said isosceles triangle.

Claim 5

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks composed of three circles which are arranged to form an isosceles triangle characterizing said character; converting the image of said marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; and discriminating said character by comparing the image information of said marked portions with standard information relating to standard image patterns stored in advance, wherein said character recognition is conducted on the basis of the coordinates of the center of gravity which is determined from the positional coordinates of the three marks forming said isosceles triangle.

Claim 6

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks composed of three circles which are arranged to form an isosceles triangle characterizing said character; converting the image of said marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; and discriminating said character by comparing the image information of said marked portions with standard information relating to standard image patterns stored in advance, wherein said character recognition is conducted on the basis of both the coordinates of the center of gravity, which is determined from the positional coordinates of the three marks forming said isosceles triangle, and the positional coordinates of the mark which is positioned at the apex of said isosceles triangle.

Claim 7

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks composed of three circles which are arranged to form an isosceles triangle characterizing said character; converting the image of said marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; and discriminating said character by comparing the image information of said marked portions with standard information relating to standard image patterns stored in advance, wherein said character recognition is conducted on the basis of both the coordinates of the center of gravity, which is determined from the positional coordinates of the three marks forming said isosceles triangle, and the positional coordinates of the mark which is positioned at the apex of said isosceles triangle.

Claim 8

A character recognizing apparatus comprising: image pickup means for converting to an electrical image signal the optical image of a character to be recognized which is formed by an ordinary character having a plurality of marks characterizing said character included thereon; filtering means for extracting only those portions of the image signal relating to the marked portions of said character; and correlation means for discriminating said character by correlating the image signal of said marked portions with signals representing the marked portions of standard image patterns of characters including the character to be recognized, wherein said marks are formed on said character in the outline of a polygon, and wherein said correlation means includes first means for determining the positional coordinates of said marked portions of the character in said image signal, second means for determining the coordinates of the center of gravity of said polygon defined by said marks from said positional coordinates determined by said first means, and means for comparing said coordinates of the center of gravity and the coordinates of the center of gravity for the polygons formed by the marks of said standard image patterns in order to select a character corresponding to the closest coordinates of the center of gravity.

Claim 9

A character recognizing apparatus comprising: image pickup means for converting to an electrical image signal the optical image of a character to be recognized which is formed by an ordinary character having a plurality of marks characterizing said character included thereon; filtering means for extracting only those portions of the image signal relating to the marked portions of said character; and correlation means for discriminating said character by correlating the image signal of said marked portions with signals representing the marked portions of standard image patterns of characters including the character to be recognized, wherein said marks are formed on said character in the outline of a polygon, and wherein said correlation means includes first means for determining the positional coordinates of said marked portions of the character in said image signal, second means for determining the coordinates of the center of gravity of said polygon defined by said marks from said positional coordinates determined by said first means, and means for comparing said coordinates of the center of gravity and the coordinates of the center of gravity for the polygons formed by the marks of said standard image patterns in order to select a character corresponding to the closest coordinates of the center of gravity.

Claim 10

A character recognition apparatus as set forth in claim 5, wherein said correlation means further includes memory means for storing the coordinates of the center of gravity of the polygons formed by the marks of a plurality of standard image patterns of different characters.

Claim 11

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks characterizing said character; converting the image of a marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; determining the coordinates of said marked portions; determining the coordinate of the center of gravity of a polygon which is formed by the arrangement of said coordinates; and discriminating said character by comparing said coordinate of the center of gravity with standard coordinates relating to standard patterns stored in advance.

Claim 12

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of marks characterizing said character; converting the image of a marked character to an electrical image signal; extracting only those signal portions relating to the marked portions of the character from said image signal; determining the coordinates of said marked portions; determining the coordinate of the center of gravity of a polygon which is formed by the arrangement of said coordinates; and discriminating said character by comparing said coordinate of the center of gravity with standard coordinates relating to standard patterns stored in advance.

Claim 13

A character recognition method as set forth in claim 7, wherein said plurality of marks is composed of three marks which are arranged to form a triangle.

Claim 14

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of three marks in an isosceles arrangement characterizing said character; converting the image of a marked character to an electrical image signal; extracting only those signal portions relating to the three marked portions of the character from said image signal; determining the positional coordinates of said three marked portions; determining the coordinate of the center of gravity of an isosceles triangle which is formed by the isosceles arrangement of said positional coordinates; and discriminating said character by comparing said coordinate of the center of gravity with standard information of coordinates relating to standard patterns stored in advance.

Claim 15

A character recognition method comprising the steps of: optically scanning a character to be recognized which is formed of an ordinary character on which there is provided a plurality of three marks in an isosceles arrangement characterizing said character; converting the image of a marked character to an electrical image signal; extracting only those signal portions relating to the three marked portions of the character from said image signal; determining the positional coordinates of said three marked portions; determining the coordinate of the center of gravity of an isosceles triangle which is formed by the isosceles arrangement of said positional coordinates; and discriminating said character by comparing said coordinate of the center of gravity with standard information of coordinates relating to standard patterns stored in advance.

Claim 16

A character recognition method as set forth in claim 9, wherein said character recognition is conducted on the basis of both said coordinate of the center of gravity and said positional coordinate which is positioned at the apex of said isosceles triangle.

Claim 17

A character recognizing apparatus comprising: image pickup means for converting to an electrical image signal the optical image of a character to be recognized which is formed by an ordinary character having a plurality of marks characterizing said character included thereon; filtering means for extracting only those portions of the image signal relating to the marked portions of said character; and correlation means for discriminating said character by correlating the image signal of said marked portions with signals representing the marked portions of standard image patterns of characters including the character to be recognized, wherein said marks are formed on said character in the outline of a polygon, and wherein said correlation means includes first means for determining the positional coordinates of said marked portions of the character in said image signal, second means for determining the coordinates of the center of gravity of said polygon defined by said marks from said positional coordinates determined by said first means, and means for comparing said coordinates of the center of gravity and the coordinates of the center of gravity for the polygons formed by the marks of said standard image patterns in order to select a character corresponding to the closest coordinates of the center of gravity.

Claim 18

A character recognizing apparatus comprising: image pickup means for converting to an electrical image signal the optical image of a character to be recognized which is formed by an ordinary character having a plurality of marks characterizing said character included thereon; filtering means for extracting only those portions of the image signal relating to the marked portions of said character; and correlation means for discriminating said character by correlating the image signal of said marked portions with signals representing the marked portions of standard image patterns of characters including the character to be recognized, wherein said marks are formed on said character in the outline of a polygon, and wherein said correlation means includes first means for determining the positional coordinates of said marked portions of the character in said image signal, second means for determining the coordinates of the center of gravity of said polygon defined by said marks from said positional coordinates determined by said first means, and means for comparing said coordinates of the center of gravity and the coordinates of the center of gravity for the polygons formed by the marks of said standard image patterns in order to select a character corresponding to the closest coordinates of the center of gravity.

Claim 19

A character recognition apparatus as set forth in claim 11, wherein said correlation means further includes memory means for storing the coordinates of the center of gravity of the polygons formed by the marks of a plurality of standard image patterns of different characters.