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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 8, AUGUST 2005

Efficient Light Balancing Techniques for Text Images in Video Presentation Systems Shih-Chang Hsia and Po-Shien Tsai. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 8, AUGUST 2005 指導老師：萬書言 學生：賴薏如. original. Using hight gain. Using low gain. Processing flow.

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 8, AUGUST 2005

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  1. Efficient Light Balancing Techniques for Text Imagesin Video Presentation SystemsShih-Chang Hsia and Po-Shien Tsai IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 8, AUGUST 2005 指導老師：萬書言 學生：賴薏如

  2. original Using hight gain Using low gain

  3. Processing flow

  4. BMV ：black mean variance ：process pixel N*N：block size

  5. ：information of light distribution at the (j,k)th pixel M：number of interpolated data in the marked line K： interpolated location

  6. ：Execpted gain value

  7. ：Number of previous text-block ：black variance in the Kth text block ：black mean in the Kth text block

  8. 　Ｔｈｅ　ｅｎｄ THANKＳ

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