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浙江大学学报(理学版)  2022, Vol. 49 Issue (5): 549-554    DOI: 10.3785/j.issn.1008-9497.2022.05.005
数学与计算机科学     
基于四元数尺度函数的边缘检测方法
胡晓晓1(),程冬2
1.温州医科大学 第一临床医学院(信息与工程学院) 附属第一医院,浙江 温州 325000
2.北京师范大学珠海校区 数学与数学教育研究中心,广州 珠海 519087
The edge detection based on the quaternion scale function
Xiaoxiao HU1(),Dong CHENG2
1.The First School of Medicine,School of Information and Engineering,The First Affiliated Hospital of Wenzhou Medical University,Wenzhou Medical University,Wenzhou 325000,Zhejiang Province,China
2.Research Center for Mathematics and Mathematics Education,Beijing Normal University,Zhuhai,Zhuhai 519087,Guangzhou Province,China
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摘要:

四元数解析信号是解析信号在四元数意义下的推广,其由原信号、四元数方向Hilbert变换和四元数交叉项Hilbert交换构成。通过四元数解析信号的极坐标表示,可得信号的特征表示,如局部相位角和局部振幅,其中局部相位角包含信号的结构信息。研究了右四元数解析信号,给出了其二维延拓定理,得到右四元数尺度函数,并将其局部特征应用于彩色图像的边缘检测,提出了基于局部相位角和局部振幅的边缘检测方法,通过对比实验,证明了基于局部相位角的边缘检测方法在抗噪上具有鲁棒性。

关键词: 右边四元数傅里叶变换(QFT)解析信号局部相位角局部衰减泊松算子    
Abstract:

The quaternion analytic signal is a generalization of analytic signal in the quaternion sense. It is constructed by an original signal and its quaternion partial and total Hilbert transforms. The signal feature representation can be provided by the polar form of the quaternion analytic signal, such as the local amplitude and local phase angle, the latter includes the structural information of the original signal. The aim of this work is to study the quaternion analytic signal associate with right-sided quaternion Fourier transform and it applications. Firstly, quaternion analytic signal associate with right-sided quaternion Fourier transform is defined. By using Possion operator, the quaternion analytic signal is extended to the quaternion scale function. The quaternion scale function provides the signal features representation. At last, three novel types of phase and amplitude-based edge detectors are proposed. Comparisons with competing methods on real-world images consistently show the superiority of the proposed methods.

Key words: right-sided quaternion Fourier transform (QFT)    analytical signal    local phase angle    local attenuation    Poisson operator
收稿日期: 2021-03-25 出版日期: 2022-09-14
CLC:  O 29  
基金资助: 温州市科技局资助项目(G2020031);浙江省教育厅一般科研项目(Y202147071);温州医科大学博士启动基金项目(QTJ18012);广东省基础与应用基础研究基金项目(2019A1515111185)
通讯作者: 胡晓晓     E-mail: huxiaoxiao@wmu.edu.cn
作者简介: 胡晓晓(1984—),ORCID:https://orcid.org/0000-0003-1866-0413,女,博士,讲师,主要从事四元数分析和应用研究.
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引用本文:

胡晓晓,程冬. 基于四元数尺度函数的边缘检测方法[J]. 浙江大学学报(理学版), 2022, 49(5): 549-554.

Xiaoxiao HU,Dong CHENG. The edge detection based on the quaternion scale function. Journal of Zhejiang University (Science Edition), 2022, 49(5): 549-554.

链接本文:

https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2022.05.005        https://www.zjujournals.com/sci/CN/Y2022/V49/I5/549

图1  原图(a) Lena (b) 房子 (c) 辣椒 (d) 盒子
图2  RQDPA, RQDPC, RQDLA, MDPC,DPC,Candy算子的边缘检测结果
方法SSIMFSIMPSNR
Lena房子辣椒盒子Lena房子辣椒盒子Lena房子辣椒盒子
RQDPA0.505 70.653 90.516 70.715 20.931 20.941 90.975 00.959 510.279 111.317 210.435 713.802 7
RQDPC0.406 60.572 70.455 90.577 00.906 00.930 40.915 90.932 29.920 310.612 910.030 311.778 9
RQDLA0.356 30.504 70.356 50.490 00.893 20.914 00.900 90.901 79.156 89.725 08.774 610.225 5
DPC0.360 30.478 00.402 00.548 10.895 10.918 30.914 60.928 79.189 19.669 49.212 810.799 2
MDPC0.356 10.477 20.399 40.549 40.893 20.916 80.912 50.928 99.221 19.750 09.284 110.993 1
表1  RQDPA,RQDPC,RQDLA,DPC,MDPC与Candy的相似度
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