License plate recognition apparatus, license plate recognition method, and computer-readable storage medium
First Claim
1. A license plate recognition apparatus comprising:
- a detection unit configured to detect a plurality of quadrangles of license plate region candidates from input images;
a character recognition unit configured to execute character recognition of a character region included in the detected license plate region candidates; and
an output unit configured to select a license plate region candidate to be output from among the plurality of license plate region candidates detected by the detection unit based on a character recognition result and the information of the quadrangle of the respective license plate region candidates and output information relating to the selected license plate region candidate,wherein the output unit, in cases where positions of the license plate region candidates overlap, narrows the license plate region candidates to be selected by leaving the license plate region candidate whose angle of a quadrangle of the respective license plate region candidates is closer to a right angle, as the candidates.
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Accused Products
Abstract
A license plate recognition apparatus includes a detection unit configured to detect a plurality of quadrangles of license plate region candidates from input images, a character recognition unit configured to execute character recognition of a character region included in the license plate region candidate detected, and an output unit configured to select a license plate region candidate to be output from among the plurality of license plate candidates detected by the detection unit based on the character recognition result and information of the quadrangle of the respective license plate region candidates and output information relating to the license plate region candidates selected.
12 Citations
18 Claims
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1. A license plate recognition apparatus comprising:
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a detection unit configured to detect a plurality of quadrangles of license plate region candidates from input images; a character recognition unit configured to execute character recognition of a character region included in the detected license plate region candidates; and an output unit configured to select a license plate region candidate to be output from among the plurality of license plate region candidates detected by the detection unit based on a character recognition result and the information of the quadrangle of the respective license plate region candidates and output information relating to the selected license plate region candidate, wherein the output unit, in cases where positions of the license plate region candidates overlap, narrows the license plate region candidates to be selected by leaving the license plate region candidate whose angle of a quadrangle of the respective license plate region candidates is closer to a right angle, as the candidates. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for causing a license plate recognition apparatus to execute operations in such a way that a computer of the license plate recognition apparatus executes a computer program, the operations comprising:
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detecting a plurality of quadrangles of license plate region candidates from input images; executing character recognition of a character region included in the license plate region candidates detected; and selecting a license plate region candidate to be output from among the plurality of license plate region candidates detected based on a character recognition result and information of the quadrangle of the respective license plate region candidates and outputting information relating to the selected license plate region candidates, wherein in cases where positions of the license plate region candidates overlap, narrows the license plate region candidates to be selected by leaving the license plate region candidate whose angle of a quadrangle of the respective license plate region candidates is closer to a right angle, as the candidates. - View Dependent Claims (14, 15, 16, 17, 18)
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8. A non-transitory computer readable storage medium storing a computer program, in which the computer program causes a computer to execute operations comprising:
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detecting a plurality of quadrangles of license plate region candidates from input images; executing character recognition of a character region included in the license plate region candidates detected; and selecting a license plate region candidate to be output from among the plurality of license plate region candidates detected based on character recognition result and information of the quadrangle of the respective license plate region candidates and outputting information relating to the selected license plate region candidates, wherein in cases where positions of the license plate region candidates overlap, narrows the license plate region candidates to be selected by leaving the license plate region candidate whose angle of a quadrangle of the respective license plate region candidates is closer to a right angle, as the candidates. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification