A key step is to extract valid information region in the fusion of multi-voltage X-ray image sequence for complicated components. To improve the self-adaption of extraction, a method is presented in this paper. In thi...A key step is to extract valid information region in the fusion of multi-voltage X-ray image sequence for complicated components. To improve the self-adaption of extraction, a method is presented in this paper. In this paper, the valid informa-tion region is selected by the grey level interval, which is computed by the optimization of image quality evaluation model. The model is based on the histogram equalization and the grey level interval. Then, every valid region of images at different voltages is extracted and they are fused according their grey level transformation function. The fusion image contains completed struc-ture information of the component. The fusion experiment of a cylinder head shows the effectiveness of the presented method.展开更多
一、概述
交流变压、变频调速电梯也称为VVVF电梯，VVVF是改变电压、改变频率英文Variable Voltage and Variable Frequency的缩写。VVVF电梯速度调节平滑，能获得十分良好的乘坐舒适感；能明显地降低电动机的起动电流。与其它类型交...一、概述
交流变压、变频调速电梯也称为VVVF电梯，VVVF是改变电压、改变频率英文Variable Voltage and Variable Frequency的缩写。VVVF电梯速度调节平滑，能获得十分良好的乘坐舒适感；能明显地降低电动机的起动电流。与其它类型交流调速系统相比，性能最好，运行效率最高，可以节能30％～50％。通常，把电压和频率固定不变的交流电变换为电压或频率可变的交流电的装置称作“变频器”。展开更多
基金National Natural Science Foundation of China(No.61227003,No.61301259,No.61471325and No.61571404)Natural Science Foundation of Shanxi Province(No.2015021099)
文摘A key step is to extract valid information region in the fusion of multi-voltage X-ray image sequence for complicated components. To improve the self-adaption of extraction, a method is presented in this paper. In this paper, the valid informa-tion region is selected by the grey level interval, which is computed by the optimization of image quality evaluation model. The model is based on the histogram equalization and the grey level interval. Then, every valid region of images at different voltages is extracted and they are fused according their grey level transformation function. The fusion image contains completed struc-ture information of the component. The fusion experiment of a cylinder head shows the effectiveness of the presented method.
文摘一、概述
交流变压、变频调速电梯也称为VVVF电梯，VVVF是改变电压、改变频率英文Variable Voltage and Variable Frequency的缩写。VVVF电梯速度调节平滑，能获得十分良好的乘坐舒适感；能明显地降低电动机的起动电流。与其它类型交流调速系统相比，性能最好，运行效率最高，可以节能30％～50％。通常，把电压和频率固定不变的交流电变换为电压或频率可变的交流电的装置称作“变频器”。
