Paper Info
Title
Effective Denoising with Non-local Means Filter for Reliable Unwrapping of Digital Holographic Interferometric Fringes.
Abstract
Estimation of phase from the complex interference field has become an emerging area of research for last few decades. The phase values obtained by using arctan function are limited to the interval \((-\pi , \pi ]\). Such phase map is known as wrapped phase. The unwrapping process, which produces continuous phase map from the wrapped phase, becomes tedious in presence of noise. In this paper, we propose a preprocessing technique that removes the noise from the interference field, thereby improving the performance of naive unwrapping algorithms. For de-noising of the complex field, real part and imaginary parts of the field are processed separately. Real-valued images (real and imaginary parts) are processed using non-local means filter with non-Euclidian distance measure. The de-noised real and imaginary parts are then combined to form a clean interference field. MATLAB’s unwrap function is used as unwrapping algorithm to get the continuous phase from the cleaned interference field. Comparison with the Frost’s filter validates the applicability of proposed approach for processing the noisy interference field.
Year
DOI
Venue
2017
10.1007/978-981-10-7895-8_2
CVIP
Field
DocType
Citations 
Noise reduction,Holography,Non-local means,Computer science,Continuous phase modulation,Algorithm,Interferometry,Interference (wave propagation),Inverse trigonometric functions,Holographic interferometry
Conference
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
P. L. Aparna100.34
Rahul G. Waghmare200.34
Deepak Mishra338674.15
Rama Krishna Sai Subrahmanyam Gorthi422.05