Wanzhong Chen

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Aiming at weak contrast between the coronary arteries and the background, a new segmentation method based on fusion algorithm is proposed. Firstly, the coronary arteries are extracted by using the maximizing entropy segmentation method based on Top-hat. Then the coronary arteries are extracted again by using the maximizing entropy segmentation method based(More)
when initializing the background model with ViBe algorithm, the prospects for moving target in background area will also be treated as a background model, and Video stream in the next area will appear the phenomenon of ghost. Although ViBe algorithm provide the method of updated background model, slowed to eliminate ghost region. When the foreground object(More)
Aiming at the complex background of coronary angiograms, weak contrast between the coronary arteries and the background, a new segmentation method based on transition region extraction of degree is proposed. Firstly, the paper analyzes the characteristic of coronary angiograms. Secondly, 6 different Gaussian matched templates are used to enhance the(More)
Aiming at the complex background of coronary angiograms, weak contrast between the coronary arteries and the background, a new segmentation method based on transition region extraction is proposed. The paper analyzes the characteristic of coronary angiograms, and then 6 different Gaussian matched templates are used to enhance the coronary angiograms.(More)
Achieving the goal of detecting seizure activity automatically using electroencephalogram (EEG) signals is of great importance and significance for the treatment of epileptic seizures. To realize this aim, a newly-developed time-frequency analytical algorithm, namely local mean decomposition (LMD), is employed in the presented study. LMD is able to(More)
The ant colony optimization algorithm usually falls into local optimal solution and can not select the path with high pheromone concentration quickly in solving the TSP. According to this, in this paper an improved MAX-MIN Ant System (MMAS) algorithm based on pheromone concentration reinitialization is proposed to overcome the shortcoming above. The(More)