| 基于小波变换和边缘模板相结合的序列B超图像边缘提取 |
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| 引用本文： | 宋光德,张慧.基于小波变换和边缘模板相结合的序列B超图像边缘提取[J].电子测量与仪器学报,2001,15(2):54-58. |
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| 作者姓名： | 宋光德 张慧 |
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| 作者单位： | [1]天津大学精密测试技术及仪器国家重点实验室，天津300072 [2]天津大学精密测试技术及仪器国家重点实验室，天津30 |
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| 基金项目： | 天津市自然科学基金资助项目 ( 96360 871 1 ) |
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| 摘 要： | 由于B超图像的分辨率差、灰度级别少等特点，用传统的边缘检测难以得到满意的效果。本文采用了基于离散二进小波变换的门限选取法，通过检测图像直方图不上波变换的零交叉点来得到图像的边缘；进而又构造出一种边缘模板，利用小波变换和边缘模板相结合的方法提取出序列B超图像的边缘。
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| 关 键 词： | 边缘检测 小波变换 边缘模板 B超图像 |
| 修稿时间： | 2000年7月1日 |
Edge Extracting For B - Ultrasonic Cross Sectional Images Based on the Combination of Wavelet Transformation and Edge Mould |
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| Song Guangde,Zhang Hui.Edge Extracting For B - Ultrasonic Cross Sectional Images Based on the Combination of Wavelet Transformation and Edge Mould[J].Journal of Electronic Measurement and Instrument,2001,15(2):54-58. |
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| Authors: | Song Guangde Zhang Hui |
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| Abstract: | Because of the low resolution and few gray-level for B-ultrasonic images,we can hardly obtain satisfied result by the traditional edge detection methods.In the paper,a threshold selection method based on discrete dyadic wavelet transform is presented,by detection of the zero-crossings of the wavelet transform of the image histogram,the image edge is obtained.Then,we generate a kind of edge mould.By the combination of wavelet transform and edge mould,we can extract the contours of all B-ultrasonic cross sectional images. |
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| Keywords: | Extracting of edge wavelet transform edge mould |
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