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A perfusion-ventilation lung SPECT image analysis system is developed in this paper. The system applies the minimum cross-entropy threshold selection method to recognizing the lung from perfusion-ventilation lung SPECT image, and utilizes the watershed segmentation method to separate the right and left pulmonary lobes. In this system, a contour tracing operator is used to detect the edge of pulmonary...
A new algorithm (image registration and texture energy analysis - ITEAR), which can accurately identify the early stage tumor in CT images, is developed in this paper. The ITEAR algorithm aligns the corresponding PET and CT images by the mutual information registration method and applies the adaptive threshold segmentation algorithm to segmenting the region of interest (ROI) in PET images. Then, the...
In this paper, a new algorithm (image recognition volume rendering - IRVR) is developed, which can remarkably reduce the redundant data during volume rendering. The IRVR algorithm applies the cross-entropy threshold selection method to identifying the object and background voxels from a three dimensional dataset. An iterating ray tracing method combined with the objects detection sampling strategy...
In some uncertain systems, parameters of PID controller are still difficult to tune. The main reason is that it is difficult to solve conflicts between static state performance and dynamic performance, track and restrain disturb, robustness and control performance. To overcome those demerits, a PID parameter optimization algorithm, which used the idea of immune genetic algorithm, was proposed in this...
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