IEEE Trans Image Process - High capacity data hiding for error-diffused block truncation coding.

Tópicos

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Resumo

Block truncation coding (BTC) is an efficient compression technique with extremely low computational complexity. However, the blocking and false contour effects are two major deficiencies in BTC which cause severe perceptual artifacts. The former scheme, error-diffused BTC (EDBTC), can significantly improve the above issues through the visual low-pass compensation on the bitmap, which thus widens its possible application market, yet the corresponding security issue may limit its value. In this paper, a method namely complementary hiding EDBTC is developed to cope the above issue. This paper is managed by firstly discussing when a single watermark is embedded, and then multiple watermarks are employed to test the limitation of the proposed scheme. Herein, an adaptive external bias factor is employed to control the watermark embedding, and this factor also affects the image quality and robustness simultaneously. Experimental results demonstrate that the proposed method only requires an extremely small external bias factor to carry watermarks, which enables a high capacity scenario without significantly damaging image quality.

Resumo Limpo

block truncat code btc effici compress techniqu extrem low comput complex howev block fals contour effect two major defici btc caus sever perceptu artifact former scheme errordiffus btc edbtc can signific improv issu visual lowpass compens bitmap thus widen possibl applic market yet correspond secur issu may limit valu paper method name complementari hide edbtc develop cope issu paper manag first discuss singl watermark embed multipl watermark employ test limit propos scheme herein adapt extern bias factor employ control watermark embed factor also affect imag qualiti robust simultan experiment result demonstr propos method requir extrem small extern bias factor carri watermark enabl high capac scenario without signific damag imag qualiti

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