光学学报, 2010, 30 (3): 727, 网络出版: 2010-03-11
用于相位展开的调制度罗伯特梯度幅值方差质量图
Modulation-Roberts Gradient Amplitude Variance Quality Map for Phase Unwrapping
摘要
为了减少相位展开过程中噪音的影响并获得正确的相位展开结果,提出了一种新型的质量图。首先分析了传统的相位导数方差质量图和基于调制度信息质量图的缺陷。然后基于各向同性的梯度幅值,融合图像锐化方法和调制度信息,构造出一种新型的“调制度罗伯特梯度幅值方差”质量图。最后通过计算机模拟图和模型实例图的相位展开,将提出的质量图与传统的相位导数方差和基于调制度信息的质量图进行了对比。实验结果表明,新的质量图更加可靠,有效地弥补了相位导数方差等传统质量图的部分缺陷。
Abstract
In order to obtain a correct phase unwrapping (PhU) result,as well as to alleviate the effect of noise,a novel quality map is proposed. Firstly,some disadvantages of phase derivative variance (PDV) quality map and modulation map are analyzed. Then based on isotropic gradient amplitude,some methods about image sharpening and modulation are combined to construct a new quality map. The new map is named “Modulation-Roberts Gradient Amplitude Variance” quality map (MRGAV). In the applications,the computer simulated and the experimental data are offered. The comparison between the MRGAV quality map and the PDV quality map shows that the MRGAV quality map is not only more reliable,but also can overcome the drawbacks of the PDV and some other traditional quality maps successfully.
傅世强, 廖文和, 崔海华, 戴宁, 程筱胜. 用于相位展开的调制度罗伯特梯度幅值方差质量图[J]. 光学学报, 2010, 30(3): 727. Fu Shiqiang, Liao Wenhe, Cui Haihua, Dai Ning, Cheng Xiaosheng. Modulation-Roberts Gradient Amplitude Variance Quality Map for Phase Unwrapping[J]. Acta Optica Sinica, 2010, 30(3): 727.