精密工学会誌
Online ISSN : 1882-675X
Print ISSN : 0912-0289
ISSN-L : 0912-0289
画像技術の実利用特集論文
交差点名標識における文字認識のための超解像用学習低周波画像の生成
平野 和弘内村 圭一上瀧 剛
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2014 年 80 巻 12 号 p. 1132-1137

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The present method of getting information of road signs has problems about working hours and expense because it is manual labor. We are developing a system about automatically recognizing of road signs which consist of characters, e.g. signs of intersection's name using on-vehicle camera. In order to increase a recognition rate, we adopted Learning Based Super-Resolution (LBSR). LBSR's resolution enhancement depends on a similarity degree of filmed road sign image and low-frequency components of learning image. In this paper, we propose a reasonable method of generating low-frequency components of learning image for road sign images. The experimental result shows that the proposed method slightly improved the recognition rate.

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