Performance comparison of motion estimation algorithms on digital video images

2009 ◽  
Author(s):  
N. A. Ali ◽  
A. S. Ja'afar ◽  
K. S. Anathakrishnan
Keyword(s):  
Motion Estimation ◽  
Digital Video ◽  
Performance Comparison ◽  
Estimation Algorithms ◽  
Video Images

Performance Analysis of Motion Estimation Algorithms on Digital Video Images

2011 ◽  
Vol 83 ◽  
pp. 174-178
Author(s):  
N. A. Ali ◽  
A. S. Ja’afar ◽  
R. Abd Rahim ◽  
Z. A. F. Mohamed Napiah ◽  
A. Md Yusop ◽  
...  
Keyword(s):  
Motion Estimation ◽  
Signal To Noise Ratio ◽  
Motion Vector ◽  
Block Matching ◽  
Estimation Algorithms ◽  
Video Images ◽  
Diamond Search ◽  
Search Patterns ◽  
Search Speed ◽  
The Cross

An improvement on redundancy to achieve high compression ratio in video coding is developed. Block Matching Motion Estimation (BMME) techniques have been particularly used in various coding standards. In the BMME, search patterns with different shapes or sizes and the center-biased characteristics of motion vector (MV) have large impact on the search speed (search points) and peak signal-to-noise ratio (PSNR) as the quality of video images. These basic algorithms are Full Search and other two fast search methods. The Cross Diamond Search (CDS) algorithm was designed to fit the cross-center-biased (CCB) MV distribution characteristics of the real-world video sequences. CDS compares favorably with the other algorithms for low motion sequences in terms of speed, quality and computational complexity.

scholarly journals IpDFT-Tuned Estimation Algorithms for PMUs: Overview and Performance Comparison

2021 ◽  
Vol 11 (5) ◽  
pp. 2318
Author(s):  
David Macii ◽  
Daniel Belega ◽  
Dario Petri
Keyword(s):  
Weighted Least Squares ◽  
Performance Comparison ◽  
Rate Of Change ◽  
Parameters Estimation ◽  
Operating Conditions ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Estimation Algorithms ◽  
Class Testing ◽  
Low Pass

The Interpolated Discrete Fourier Transform (IpDFT) is one of the most popular algorithms for Phasor Measurement Units (PMUs), due to its quite low computational complexity and its good accuracy in various operating conditions. However, the basic IpDFT algorithm can be used also as a preliminary estimator of the amplitude, phase, frequency and rate of change of frequency of voltage or current AC waveforms at times synchronized to the Universal Coordinated Time (UTC). Indeed, another cascaded algorithm can be used to refine the waveform parameters estimation. In this context, the main novelty of this work is a fair and extensive performance comparison of three different state-of-the-art IpDFT-tuned estimation algorithms for PMUs. The three algorithms are: (i) the so-called corrected IpDFT (IpDFTc), which is conceived to compensate for the effect of both the image of the fundamental tone and second-order harmonic; (ii) a frequency-tuned version of the Taylor Weighted Least-Squares (TWLS) algorithm, and (iii) the frequency Down-Conversion and low-pass Filtering (DCF) technique described also in the IEEE/IEC Standard 60255-118-1:2018. The simulation results obtained in the P Class and M Class testing conditions specified in the same Standard show that the IpDFTc algorithm is generally preferable under the effect of steady-state disturbances. On the contrary, the tuned TWLS estimator is usually the best solution when dynamic changes of amplitude, phase or frequency occur. In transient conditions (i.e., under the effect of amplitude or phase steps), the IpDFTc and the tuned TWLS algorithms do not clearly outperform one another. The DCF approach generally returns the worst results. However, its actual performances heavily depend on the adopted low-pass filter.

scholarly journals Using modern motion estimation algorithms in existing video codecs

2018 ◽  
Author(s):  
Davinder Singh ◽  
François Pitié ◽  
Anil Kokaram ◽  
Daniel Joseph Ringis
Keyword(s):  
Motion Estimation ◽  
Video Codecs ◽  
Estimation Algorithms
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