Title:
CHARACTER READER, CHARACTER READING METHOD, AND CHARACTER READING CONTROL PROGRAM USED FOR THE CHARACTER READER
Document Type and Number:
WIPO Patent Application WO/2006/080568
Kind Code:
A1
Abstract:
A partial character string extracting section (4) determines a feature value stable to projective transformation and affine transformation from any two rectangles obtained by labeling, compares the feature value with a dictionary, and extracts a partial character string. A character string candidate extracting section(5) checks if the partial character string is linearly continuous and has a predetermined pitch according to the feature value stable to projective transformation and extracts a character string corresponding to a serial number from a number plate obliquely imaged. A peripheral information extracting section (6) determines a feature value stable to projective transformation and affine transformation using information on the character string of the serial number, compares the feature value with a dictionary, and accurately extracts a character string at high speed from the number plate obliquely imaged.
Inventors:
ISHIDERA EIKI (JP)
Application Number:
PCT/JP2006/301898
Publication Date:
August 03, 2006
Filing Date:
January 30, 2006
Export Citation:
Assignee:
NEC CORP (JP)
ISHIDERA EIKI (JP)
ISHIDERA EIKI (JP)
International Classes:
G06V30/166; G06V30/10
Foreign References:
| JPH02206894A | 1990-08-16 | |||
| JPH10240958A | 1998-09-11 | |||
| JPH04142685A | 1992-05-15 |
Attorney, Agent or Firm:
Matsumoto, Masao (Nishi-Ikebukuro 2-chome Toshima-ku, Tokyo 21, JP)
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