CHARACTER RECOGNITION DEVICE, CHARACTER RECOGNITION METHOD AND PROGRAM
First Claim
1. A character recognition device, comprising:
- a storage means storing a plurality of dictionary databases corresponding to each of a plurality of degradation levels, said plurality of dictionary databases being generated from images wherein an original character image has been degraded using a plurality of different degradation levels;
an image input means that receives input of images;
an extraction means that extracts character images from said images;
a usage order determination means that determines an usage order for the plurality of dictionary databases on the basis of degradation degrees for extracted character images; and
a character recognition means that uses dictionary databases in accordance with said usage order, recognizes characters included in the extracted character images and, if recognition results do not fulfil prescribed conditions, performs character recognition using the dictionary database next in said usage order, if recognition results fulfil the prescribed conditions, outputs the recognition results without performing recognition using the dictionary database next in said usage order.
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Abstract
A character recognition device comprising: a storage means storing a plurality of dictionary databases corresponding to each of a plurality of degradation levels, said databases being generated from images wherein an original character image has been degraded using a plurality of different degradation levels; an image input means that receives input of images; an extraction means that extracts character images from said images; a usage order determination means that determines an usage order for dictionary databases on the basis of degradation degrees for extracted character images; and a character recognition means that uses dictionary databases in accordance with said usage order, recognizes characters included in the extracted character image and, if recognition results for the character recognition fulfil prescribed conditions, outputs the recognition results without performing recognition using the dictionary database next in said usage order. As a result, accurate and fast recognition of degraded character images can be performed.
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Citations
11 Claims
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1. A character recognition device, comprising:
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a storage means storing a plurality of dictionary databases corresponding to each of a plurality of degradation levels, said plurality of dictionary databases being generated from images wherein an original character image has been degraded using a plurality of different degradation levels; an image input means that receives input of images; an extraction means that extracts character images from said images; a usage order determination means that determines an usage order for the plurality of dictionary databases on the basis of degradation degrees for extracted character images; and a character recognition means that uses dictionary databases in accordance with said usage order, recognizes characters included in the extracted character images and, if recognition results do not fulfil prescribed conditions, performs character recognition using the dictionary database next in said usage order, if recognition results fulfil the prescribed conditions, outputs the recognition results without performing recognition using the dictionary database next in said usage order. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A character recognition method, executed by a computer, the computer storing a plurality of dictionary databases corresponding to each of a plurality of degradation levels, said plurality of dictionary databases being generated from images wherein an original character image has been degraded using a plurality of different degradation levels, the character recognition method comprising:
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an image input step of receiving input of images; an extraction step of extracting character image from said images; a usage order determination step of determining an usage order for the plurality of dictionary databases on the basis of degradation degrees for extracted character images; and a character recognition step of using dictionary databases in accordance with said usage order, recognizes characters included in the extracted character image and, if recognition results do not fulfil prescribed conditions, performing character recognition using the dictionary database next in said usage order, if recognition results fulfil the prescribed conditions, outputting the recognition results without performing recognition using the dictionary database next in said usage order. - View Dependent Claims (11)
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Specification