Active acquisition of character information by a controllable video camera

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The aim of this research is to develop a method of actively acquiring character information in scene images with a video camera that is controllable by a computer. Detection methods of the area where characters exist and accurate recognition method of the character images were investigated. An object recognition method in the image was also investigated. The main results of this research are as follows.1.Character recognition in scene imagesIt is difficult to extract the area where the character string exists in a scene image because of low resolution, changing in the lighting condition, etc. An algorithm for precise character extraction using color and luminance information is proposed. Moreover, a method for detecting and recognizing an isolated character is also investigated.2.Object recognition in scene imagesA method for recognizing objects in a scene image at high speed was investigated. The color histogram has been reported to be robust to the change and occlusion of the object compared with the other features. The proposed method achieves quick object detection by constructing color histograms efficiently. A technique for identifying a silhouette by representing the silhouette by a hierarchical graph was also investigated. Moreover, a novel approach of a template matching by representing an object image by a function was also investigated.