IEEE Trans Image Process - Improved block truncation coding using optimized dot diffusion.

Tópicos

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Resumo

Block truncation coding (BTC) has been considered a highly efficient compression technique for decades. However, its inherent artifacts, blocking effect and false contour, caused by low bit rate configuration are the key problems. To deal with these, an improved BTC, namely dot-diffused BTC (DDBTC), is proposed in this paper. Moreover, this method can provide excellent processing efficiency by exploiting the nature parallelism advantage of the dot diffusion, and excellent image quality can also be offered through co-optimizing the class matrix and diffused matrix of the dot diffusion. According to the experimental results, the proposed DDBTC is superior to the former error-diffused BTC in terms of various objective image quality assessment methods as well as processing efficiency. In addition, the DDBTC also shows a significant image quality improvement comparing with that of the former ordered-dither BTC.

Resumo Limpo

block truncat code btc consid high effici compress techniqu decad howev inher artifact block effect fals contour caus low bit rate configur key problem deal improv btc name dotdiffus btc ddbtc propos paper moreov method can provid excel process effici exploit natur parallel advantag dot diffus excel imag qualiti can also offer cooptim class matrix diffus matrix dot diffus accord experiment result propos ddbtc superior former errordiffus btc term various object imag qualiti assess method well process effici addit ddbtc also show signific imag qualiti improv compar former ordereddith btc

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