基于小波变换的CT/ECT图像融合方法

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摘要在基于工业CT及ECT的多相流参数测量中,CT所得重建图像分辨率较高,但由于其投影角度较少,重建图像边缘出现失真;对于ECT 系统,由于其敏感场软场特性,其重建图像分辨率较低,但图像边缘保真度高。基于二者的互补特性,研究了CT/ECT图像融和方法,提出了改进的逻辑滤波器算法应用于小波变换的低频系数融合规则,结果表明该方法可提高融合后的重建图像质量。

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	马平
	司志宁

关键词 ：计量学, 多相流参数测量, CT, 电容层析成像, 图像融合, 逻辑滤波器算法, 小波变换

Abstract：In the multi-phase flow parameter measurement based on industrial CT and ECT, CT reconstruction of the image resolution is higher, however its low projection angle, it can cause the reconstruction image edge distortion. For the ECT system, because of its sensitive field soft field feature, reconstructed image resolution is low, but the image edge fidelity is high. Based on the complementary characteristics of the two methods, the CT/ECT image fusion method was studied. The improved logic filter algorithm was applied to the low frequency coefficient fusion rules of wavelet transform. The results showed that the method can improve the quality of reconstructed image after fusion.

Key words： metrology multi-phase flow parameter measurement computed tomography electrical capacitance tomography image fusion logic filter algorithm wavelet transform

收稿日期: 2016-10-21 发布日期: 2018-07-06

PACS:

TB937

基金资助:国家自然科学基金(51306058)

通讯作者: 司志宁 E-mail: 741143845@qq.com

作者简介: 马平(1962-), 女, 湖南长沙人, 华北电力大学教授,硕士生导师, 主要从事现代传感技术及多源信息融合方面的研究。wz1998gl@sina.com

引用本文:

马平,司志宁. 基于小波变换的CT/ECT图像融合方法[J]. 计量学报, 2018, 39(4): 536-540.
MA Ping,SI Zhi-ning. A Method of CT/ECT Image Fusion Based on Wavelet Transform. Acta Metrologica Sinica, 2018, 39(4): 536-540.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/ 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2018/V39/I4/536