Phase Based Disparity Estimation Using Adaptive Structured Light and Dual-Tree Complex Wavelet

2011 ◽  
Author(s):  
Qiang Li ◽  
Moyuresh Biswas ◽  
Michael R. Frater ◽  
Mark R. Pickering
Keyword(s):  
Structured Light ◽  
Disparity Estimation ◽  
Complex Wavelet

IMAGE DISPARITY ESTIMATION BASED ON FRACTIONAL DUAL-TREE COMPLEX WAVELET TRANSFORM: A MULTI-SCALE APPROACH

2013 ◽  
Vol 11 (01) ◽  
pp. 1350004 ◽  
Author(s):  
SANOJ KUMAR ◽  
SANJEEV KUMAR ◽  
BALASUBRAMANIAN RAMAN ◽  
N. SUKAVANAM
Keyword(s):  
Wavelet Transform ◽  
Fractional Fourier Transform ◽  
Estimation Algorithm ◽  
Analytic Signal ◽  
Disparity Estimation ◽  
Complex Wavelet Transform ◽  
Multi Scale ◽  
Mathematical Properties ◽  
Realistic Image ◽  
Complex Wavelet

In this paper, an efficient multi-scale image disparity estimation algorithm is proposed which estimates the local displacements needed to align different regions between a pair of images. This phase-based approach is based on fractional dual-tree complex wavelet transform (FrDTCWT). In the proposed FrDTCWT, initially we obtained the fractional Fourier transform of the image. We decomposed the fractional transformed image by dual-tree complex wavelet transform into real and imaginary parts. The complex analytic signal is obtained from the real-valued function which is obtained from this FrDTCWT. The FRDTCWT inherits the excellent mathematical properties of DTCWT and FrFT. Phase and amplitude of the image are computed from the complex analytic signal. The disparity is estimated as the optical flow using the phase difference method. The efficiency of the proposed algorithm is carried out by different experiments on synthetic as well as on realistic image sequences.

On Path Generation Method for Laser Cleaning Robot Based on Line Structured Light

2020 ◽  
Author(s):  
Qingzeng Ma ◽  
Dongbin Zhang ◽  
Shuo Jin ◽  
Yuan Ren ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Structured Light ◽  
Laser Cleaning ◽  
Path Generation ◽  
Cleaning Robot ◽  
On Line

Fast disparity estimation algorithm based on features of disparity vector

2013 ◽  
Vol 32 (6) ◽  
pp. 1856-1859
Author(s):  
Xiao-wei SONG ◽  
Lei YANG ◽  
Zhong LIU ◽  
Liang LIAO
Keyword(s):  
Estimation Algorithm ◽  
Disparity Estimation ◽  
Disparity Vector
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