A public verifiable copy protection technique for still images
Journal of Systems and Software
A wavelet-tree-based watermarking method using distance vector of binary cluster
Expert Systems with Applications: An International Journal
A blind watermarking method using maximum wavelet coefficient quantization
Expert Systems with Applications: An International Journal
An efficient wavelet-tree-based watermarking method
Expert Systems with Applications: An International Journal
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An embedded wavelet coder algorithm which adopts different threshold values in different subbands is proposed in this work. The new image coder, called the multi-threshold wavelet coder (MTWC), achieves a better rate-distortion performance than existing embedded wavelet coders for applications requiring higher quality with higher bit rates (e.g. greater than 1 bpp). Another advantage of MTWC is its lower computational complexity. The superior performance of SITWC can be explained by examining the evolution of the distortion distribution in each subband as image data are compressed in the embedded coding process. Experimental results are given to demonstrate the performance of MTWC at various bit rates. Keywords: image compression, embedded coding, multi-threshold, wavelet coding.