Hwai-Tsu Hu

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Digital images are often corrupted by impulsive noise during data acquisition, transmission, and processing. This paper presents a turbulent particle swarm optimization (PSO) (TPSO)-based fuzzy filtering (or TPFF for short) approach to remove impulse noise from highly corrupted images. The proposed fuzzy filter contains a parallel fuzzy inference mechanism,(More)
In this paper the merits of block-based blind watermarking in a composite DWT-DCT domain are explored. To improve the performance in robustness and imperceptibility, the quantization index modulation (QIM) applied to DWT-DCT coefficients has been formulated in an adaptive manner, where controlling parameters are designed to minimize the bit error rates of(More)