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基于小波变换的多尺度多阈值的语音增强算法
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作者 张华卫 刘金虎 李楠 《科技资讯》 2007年第31期194-195,共2页
本文提出了基于小波变换的多尺度多阈值语音增强算法,采用软限幅函数对浊音和清音的小波系数作不同的阈值处理,仿真结果表明,这是一种有效的语音增强算法。
关键词 语音增强 小波变换 多尺度多阈值
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The Study of Image Segmentation Based on the Combination of the Wavelet Multi-scale Edge Detection and the Entropy Iterative Threshold Selection 被引量:3
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作者 ZHANG Qian HE Jian-feng +3 位作者 MA Lei PAN Li-peng LIU Jun-qing CHEN Hong-lei 《Chinese Journal of Biomedical Engineering(English Edition)》 2013年第4期154-160,共7页
This paper proposes an image segmentation method based on the combination of the wavelet multi-scale edge detection and the entropy iterative threshold selection.Image for segmentation is divided into two parts by hig... This paper proposes an image segmentation method based on the combination of the wavelet multi-scale edge detection and the entropy iterative threshold selection.Image for segmentation is divided into two parts by high- and low-frequency.In the high-frequency part the wavelet multiscale was used for the edge detection,and the low-frequency part conducted on segmentation using the entropy iterative threshold selection method.Through the consideration of the image edge and region,a CT image of the thorax was chosen to test the proposed method for the segmentation of the lungs.Experimental results show that the method is efficient to segment the interesting region of an image compared with conventional methods. 展开更多
关键词 wavelet multi-scale ENTROPY iterative threshold lung images
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