Gradation processing technology can enhance display contrast of interested region by using linear... more Gradation processing technology can enhance display contrast of interested region by using linear or nonlinear transform. Current algorithms generally calculate transform parameters depended on experimental statistical values or some simple image processing method such as histogram analysis. They cannot accord with the human subjective vision mechanism nor can they intelligently acquire required parameters. Therefore, processing results are not very accurate or reliable. We propose a gradation processing algorithm of digital radiological chest images based on region growing segmentation technology. It combines self-adapted segmentation with prior knowledge of directed segmentation, and its computation cost is low. It can perform contrast enhancement of the interested regions more accurately, and accords with the human subjective vision mechanism better.
IEE Proceedings I Communications, Speech and Vision, 1990
A systematic trellis encoding technique based on trellis partitioning and on newly defined branch... more A systematic trellis encoding technique based on trellis partitioning and on newly defined branch distances is proposed. This encoding technique avoids the usual exhaustive search for finding good trellis codes. It gives the lower and upper bounds on free distance which depend only on the encoder memory and the signal space. The optimal combination of signal set and trellis is
Gradation processing technology can enhance display contrast of interested region by using linear... more Gradation processing technology can enhance display contrast of interested region by using linear or nonlinear transform. Current algorithms generally calculate transform parameters depended on experimental statistical values or some simple image processing method such as histogram analysis. They cannot accord with the human subjective vision mechanism nor can they intelligently acquire required parameters. Therefore, processing results are not very accurate or reliable. We propose a gradation processing algorithm of digital radiological chest images based on region growing segmentation technology. It combines self-adapted segmentation with prior knowledge of directed segmentation, and its computation cost is low. It can perform contrast enhancement of the interested regions more accurately, and accords with the human subjective vision mechanism better.
The letter describes a comparison of some receiver structures suitable for trellis-coded modulati... more The letter describes a comparison of some receiver structures suitable for trellis-coded modulation on channels causing intersymbol interference. Simulation results show that a Viterbi decoder treating trellis coding and intersymbol interference as one compound encoding mechanism yields the best performance, which at P/sub b/=10/sup -4/ is about 6 dB in S/N better than any other receiver structure. >
The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact w... more The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact which restricts practical applications to small values of m. Cost can be reduced substantially by restricting either the metric or the number of states. Simulation results show the trade-off between cost reduction and performance.
Gradation processing technology can enhance display contrast of interested region by using linear... more Gradation processing technology can enhance display contrast of interested region by using linear or nonlinear transform. Current algorithms generally calculate transform parameters depended on experimental statistical values or some simple image processing method such as histogram analysis. They cannot accord with the human subjective vision mechanism nor can they intelligently acquire required parameters. Therefore, processing results are not very accurate or reliable. We propose a gradation processing algorithm of digital radiological chest images based on region growing segmentation technology. It combines self-adapted segmentation with prior knowledge of directed segmentation, and its computation cost is low. It can perform contrast enhancement of the interested regions more accurately, and accords with the human subjective vision mechanism better.
IEE Proceedings I Communications, Speech and Vision, 1990
A systematic trellis encoding technique based on trellis partitioning and on newly defined branch... more A systematic trellis encoding technique based on trellis partitioning and on newly defined branch distances is proposed. This encoding technique avoids the usual exhaustive search for finding good trellis codes. It gives the lower and upper bounds on free distance which depend only on the encoder memory and the signal space. The optimal combination of signal set and trellis is
Gradation processing technology can enhance display contrast of interested region by using linear... more Gradation processing technology can enhance display contrast of interested region by using linear or nonlinear transform. Current algorithms generally calculate transform parameters depended on experimental statistical values or some simple image processing method such as histogram analysis. They cannot accord with the human subjective vision mechanism nor can they intelligently acquire required parameters. Therefore, processing results are not very accurate or reliable. We propose a gradation processing algorithm of digital radiological chest images based on region growing segmentation technology. It combines self-adapted segmentation with prior knowledge of directed segmentation, and its computation cost is low. It can perform contrast enhancement of the interested regions more accurately, and accords with the human subjective vision mechanism better.
The letter describes a comparison of some receiver structures suitable for trellis-coded modulati... more The letter describes a comparison of some receiver structures suitable for trellis-coded modulation on channels causing intersymbol interference. Simulation results show that a Viterbi decoder treating trellis coding and intersymbol interference as one compound encoding mechanism yields the best performance, which at P/sub b/=10/sup -4/ is about 6 dB in S/N better than any other receiver structure. >
The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact w... more The cost of the Viterbi algorithm1 increases exponentially with the constraint length m, a fact which restricts practical applications to small values of m. Cost can be reduced substantially by restricting either the metric or the number of states. Simulation results show the trade-off between cost reduction and performance.
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Papers by Jerry Zou