Information processing apparatus having learning function for character dictionary

• US 20060291692A1
• Filed: 03/13/2006
• Published: 12/28/2006
• Est. Priority Date: 06/24/2005
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Maeda, Masaya, Hamamura, Tomoyuki, Irie, Bunpei, Aoki, Yasuhiro, Akagi, Takuma, Ariyoshi, Shunji, Horiuchi, Hideo, Nakao, Akihiko
• Application Number:
  US11/373,220
• Publication Number:
  US 20060291692A1
• Time in Patent Office: Days
• US Class Current: 382/101
• CPC Class Codes: G06V 30/10 Character recognition
• CPC Class Codes: G06V 30/242 Division of the character sequences into groups prior to recognition; Selection of dictionaries
• CPC Class Codes: G06V 30/262 using context analysis, e.g. lexical, syntactic or semantic context

Abstract

A search processing section searches information stored in an address database, using a first character series, e.g., a postal code input through an input device as a search key, for a second character series corresponding to an address. A character recognition processing section performs character recognition with respect to a predetermined area in the image, using a character dictionary, and generates candidates for a character series including a name or designation, a postal code, an address, etc. A character image selection processing section selects a character series corresponding to the searched second character series from the generated candidates. A character image storage section stores correlation between each of the characters constituting the selected character series and a character image thereof. A character dictionary learning processing section performs a learning process with respect to the character dictionary, based on the stored correlation between each character and the character image thereof.

Claims

1. An information processing apparatus which captures a letter image bearing address information and performs a character recognition process, the apparatus comprising:

an address information storage section which stores information relating to addresses for use in description of a letter;

a search processing section which searches the information stored in the address information storage section, using a first character series as a search key, for a second character series corresponding to an address;

a character dictionary storage section which stores a character dictionary indicative of correlation between each of characters used in the letter and a character image thereof;

a character recognition processing section which performs character recognition with respect to a predetermined area in the image, using the character dictionary stored in the character dictionary storage section, and generates candidates for a character series including at least an address;

a character image selection processing section which selects a character series corresponding to the second character series searched by the search processing section from the candidates generated by the character recognition processing section; and

a character dictionary learning processing section which performs a learning process with respect to the character dictionary stored in the character dictionary storage section, based on correlation between each of characters constituting the character series selected by the character image selection processing section and a character image thereof.

2. The information processing apparatus according to claim 1, wherein the character dictionary stored in the character dictionary storage section is configured to register a plurality of different kinds of character images in association with one character.

3. The information processing apparatus according to claim 1, wherein the first character series corresponds to a postal code.

4. The information processing apparatus according to claim 1, wherein the first character series corresponds to a name or designation.

5. The information processing apparatus according to claim 1, wherein the first character series corresponds to a phone number.

6. The information processing apparatus according to claim 1, wherein the first character series is input through an input device.

7. The information processing apparatus according to claim 6, wherein the character image selection processing section selects a character series corresponding to the first character series input through the input device from the candidates generated by the character recognition processing section, and selects a character series corresponding to the second character series from candidates of a character series of a line adjacent to a line of the selected character series in the image.

8. The information processing apparatus according to claim 1, wherein the character recognition processing section includes a first recognition processing section which performs character recognition with respect to a predetermined area in the image and generates candidates for the first character series used as the search key, and a second recognition processing section which generates candidates for the second character series from a line adjacent to a line of the first character series in the image.

9. The information processing apparatus according to claim 7, further comprising:

a destination address area information storage section which stores destination address area information indicative of an area of a destination address in the image;

a destination address area determination section which determines an area, which is to be processed by the character recognition processing section, based on the destination address area information stored in the destination address area information storage section; and

a destination address area information learning processing section which performs a learning process with respect to the destination address area information stored in the destination address area information storage section, based on areas on the image of the first character series and the second character series selected by the character image selection processing section.

10. The information processing apparatus according to claim 7, further comprising:

a sender-specific letter format information storage section which stores sender-specific letter format information in which a letter format specific to a sender is defined;

a destination address area determining section which determines a destination address area in an area, which is to be processed by the character recognition processing section, based on the sender-specific letter format information stored in the sender-specific letter format information storage section;

a sender address area determining section which determines a sender address area in an area, which is to be processed by the character recognition processing section, based on the sender-specific letter format information stored in the sender-specific letter format information storage section; and

a sender-specific letter format learning processing section which performs a learning process with respect to the sender-specific letter format information stored in the sender-specific letter format information storage section, based on areas on the image of the first character series and the second character series selected for each of the destination address area and the sender address area by the character image selection processing section.