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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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