• Proceedings of the Korean Society of Computer Information Conference
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• 2011.01a
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• pp.43-45
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• 2011

본 논문은 동영상 내 삽입된 자막을 문자인식이 가능하도록 문자영역을 이루는 화소를 추출하는 방법을 제안한다. 최초 자막영상을 통계학적 방법을 이용하여 색상극성을 결정한다. 이 후 색상극성에 따른 잡음제거 방법을 명암값기반과 형태학적기반으로 달리한다. 제안된 방법은 각 색상결정에 따른 적합한 잡음제거를 수행함으로서 추출된 화소들이 이루는 문자영역의 영상을 이용하여 문자인식을 수행하였을 때 기존방법보다 높은 문자인식률을 보였다.

• Journal of Broadcast Engineering
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• v.18 no.4
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• pp.559-571
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• 2013

This paper has presented a few problems when the 2D video superimposed the overlay text was converted to the 3D stereoscopic video. To resolve the problems, it proposes the scenario which the original video is divided into two parts, one is the video only with overlay text graphic region and the other is the video with holes, and then processed respectively. And this paper focuses on research only to detect and extract the overlay text graphic region, which is a first step among the processes in the proposed scenario. To decide whether the overlay text is included or not within a frame, it is used the corner density map based on the Harris corner detector. Following that, the overlay text region is extracted using the hybrid method of color and motion information of the overlay text region. The experiment shows the results of the overlay text region detection and extraction process in a few genre video sequence.