METHOD AND APPARATUS FOR EXTRACTING TEXT AREA, AND AUTOMATIC RECOGNITION SYSTEM OF NUMBER PLATE USING THE SAME
First Claim
Patent Images
1. A method of extracting a text area, comprising:
- generating a text area prediction value within an input second image based on a plurality of text area data stored in a database including geometric information about a text area of a first image;
generating a text recognition result value by determining whether a text is recognized with respect to a probable text area within the input second image; and
selecting a text area within the second image by combining the generated text area prediction value and text recognition result value.
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Abstract
Disclosed is a method of extracting a text area, the method including generating a text area prediction value within an input second image based on a plurality of text area data stored in a database including geometric information about a text area of a first image, generating a text recognition result value by determining whether a text is recognized with respect to a probable text area within the input second image, and selecting a text area within the second image by combining the generated text area prediction value and text recognition result value.
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Citations
15 Claims
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1. A method of extracting a text area, comprising:
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generating a text area prediction value within an input second image based on a plurality of text area data stored in a database including geometric information about a text area of a first image; generating a text recognition result value by determining whether a text is recognized with respect to a probable text area within the input second image; and selecting a text area within the second image by combining the generated text area prediction value and text recognition result value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for extracting a text area, comprising:
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a database to include geometric information about a text area of a first image; a missing value predicting unit to generate a missing value estimate by predicting a missing value of a text area within an input second image based on a plurality of text area data stored in the database; a first score map generating unit to generate a first score map storing an estimation probability about the missing value estimate based on the predicted missing value estimate; a text recognition unit to generate a text recognition result value by determining whether a text is recognized with respect to a probable text area within the input second image; a second score map generating unit to generate a second score map storing an estimation probability of whether the recognized text exists; and a text area selecting unit to select the text area within the second image by combining the generated first score map and second score map.
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15. An automatic number plate recognition system, comprising:
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a number plate detecting unit to detect a number plate image from an external image photographed using a camera; a text area extracting unit to generate a text area prediction value within the detected number plate image based on a database including geometric information about a text area within a pre-stored number plate image, to generate a text recognition result value by determining whether a text is recognized with respect to a probable text area within the number plate image, and to select a text area within the number plate image by combining the generated text area prediction value and text recognition result value; and a text identifying unit to identify a text indicated within the extracted text area.
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Specification