Conference Paper
Reversible integer color transform with bitconstraint
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
DOI: 10.1109/ICIP.2005.1530554 Conference: Image Processing, 2005. ICIP 2005. IEEE International Conference on, Volume: 3 Source: IEEE Xplore

Conference Paper: Avoidance of singular point in reversible KLT.
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ABSTRACT: In this report, permutation of order and sign of signals are introduced to avoid singular point problem of a reversible transform. When a transform is implemented in the lifting structure, it can be "reversible" in spite of rounding operations inside the transform. Therefore it has been applied to lossless coding of digital signals. However some coefficient values of the transform have singular points (SP). Around the SP, rounding errors are magnified to huge amount and the coding efficiency is decreased. In this report, we analyze the SP of a three point KLT for RGB color components of an image signal, and introduce permutation of order and sign of signals to avoid the SP problem. It was experimentally confirmed that the proposed method improved PSNR by approximately 15 [dB] comparing to the worst case.Proceedings fo the Picture Coding Symposium, PCS 2010, Nagoya, Japan, 810 December, 2010; 01/2010  [Show abstract] [Hide abstract]
ABSTRACT: In this article, the relationship between the present situation and effect factors are studied though the investigation of 364 college students male and female of Tongren University. The results have also been compared with the average of the nation college students. The conclusion shows that there has been obviously distinct in gender and grade about the degree of sports tourism participation; The average degree of participation of Tongren University college students is higher than that of nation ones, and the trends of participation of Tongren University college students in grades is the same as nation ones; There has been positive affected relationship between the degree of sports tourism participation and cognitive behavior, behavior motive, behavior habit, however, the situation is opposite in subjective criteria and the pressure on the environment.01/2010;  [Show abstract] [Hide abstract]
ABSTRACT: The feasibility of lossless compression of encrypted images has been recently demonstrated by relying on the analogy with source coding with side information at the decoder. However previous works only addressed the compression of bilevel images, namely sparse black and white images, with asymmetric probabilities of black and white pixels. In this paper we investigate the possibility of compressing encrypted grey level and color images, by decomposing them into bitplanes. A few approaches to exploit the spatial and crossplane correlation among pixels are discussed, as well as the possibility of exploiting the correlation between color bands. Some experimental results are shown to evaluate the gap between the proposed solutions and the theoretically achievable performance.01/2008;
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