• Title/Summary/Keyword: Motion Estimation

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Design of Low Power Motion Estimation for MPEG-4 (MPEG-4를 위한 저전력 Motion Estimation 설계)

  • 최홍규;이문기
    • Proceedings of the IEEK Conference
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    • pp.851-854
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    • 2003
  • The low power motion estimation for MPEG-4 is a soft-core for hardwired motion estimation block in MPEG-4. This motion estimation is modified by 10 difference mode. So, this motion estimation decrease a power consumption compare conventional step search. This modified 4SS Low power Motion Estimation has been tested and verified to be valid for implementation of FPGA. The average PSNR between the original image and the motion-compensated image is 28.25dB. And Power consumption is 26mW.

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Adaptive Zoom Motion Estimation Method (적응적 신축 움직임 추정 방법)

  • Jang, Won-Seok;Kwon, Oh-Jun;Kwon, Soon-Kak
    • Journal of Korea Multimedia Society
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    • v.17 no.8
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    • pp.915-922
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    • 2014
  • We propose an adaptive zoom motion estimation method where a picture is divided into two areas based on the distance information with a depth camera : the one is object area and the other is background area. In the proposed method, the zoom motion is only applied to the object area except the background area. Further, the block size of motion estimation for the object area is set to smaller than that of background area. This adaptive zoom motion estimation method can be reduced at the complexity of motion estimation and can be improved at the motion estimation performance by reducing the block size of the object area in comparison with the conventional zoom motion estimation method. Based on the simulation results, the proposed method is compared with the conventional methods in terms of motion estimation accuracy and computational complexity.

Variable Block Size Motion Estimation Techniques for The Motion Sequence Coding (움직임 영상 부호화를 위한 가변 블록 크기 움직임 추정 기법)

  • 김종원;이상욱
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.30B no.4
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    • pp.104-115
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    • 1993
  • The motion compensated coding (MCC) technique, which exploits the temporal redundancies in the moving images with the motion estimation technique,is one of the most popular techniques currently used. Recently, a variable block size(VBS) motion estimation scheme has been utilized to improve the performance of the motion compensted coding. This scheme allows large blocks to the used when smaller blocks provide little gain, saving rates for areas containing more complex motion. Hence, a new VBS motion estimation scheme with a hierarchical structure is proposed in this paper, in order to combine the motion vector coding technique efficiently. Topmost level motion vector, which is obtained by the gain/cost motion estimation technique with selective motion prediction method, is always transmitted. Thus, the hierarchical VBS motion estimation scheme can efficiently exploit the redundancies among neighboring motion vectors, providing an efficient motion vector encoding scheme. Also, a restricted search with respect to the topmost level motion vector enables more flexible and efficient motion estimation for the remaining lower level blocks. Computer simulations on the high resolution image sequence show that, the VBS motion estimation scheme provides a performance improvement of 0.6~0.7 dB, in terms of PSNR, compared to the fixed block size motion estimation scheme.

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Power-Aware Motion Estimation for Low-Power Multimedia Communication (저전력 멀티미디어 통신을 위한 전력 의식 움직임 추정 기법)

  • Lee, Seong-Soo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.1C
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    • pp.149-156
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    • 2004
  • In this paper, novel power-aware motion estimation is proposed for low-power multimedia communication. In the video compression, motion estimation dominates the total power consumption, where better performance usually requires more power consumption. Among several motion estimation algorithms with different performance and power, the proposed motion estimation adaptively selects the optimal algorithm during run-time, considering the trade-off between performance and power. The proposed motion estimation can be easily applied to various motion estimation algorithms with negligible computation or hardware overhead. According to simulation results, the proposed motion estimation reduces the power consumption to 1/15.7~1/5.6 without performance degradation, when compared to the conventional algorithms.

A Study on MYO-based Motion Estimation System Design for Robot Control (로봇 원격제어를 위한 MYO 기반의 모션 추정 시스템 설계 연구)

  • Chae, Jeongsook;Cho, Kyungeun
    • Journal of Korea Multimedia Society
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    • v.20 no.11
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    • pp.1842-1848
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    • 2017
  • Recently, user motion estimation methods using various wearable devices have been actively studied. In this paper, we propose a motion estimation system using Myo, which is one of the wearable devices, using two Myo and their dependency relations. The estimated motion is used as a command for remotely controlling the robot. Myo's Orientation and EMG signals are used for motion estimation. These two type data sets are used complementarily to increase the accuracy of motion estimation. We design and implement the system according to the proposed method and analyze the results through experiments. As a result of comparison with previous studies, the accuracy of motion estimation can be improved by about 12.3%.

An Efficient Motion Estimation Method Using Hierarchical Structure (계층적 구조를 이용한 효율적인 변위 추정 방법)

  • 황신환;이상욱
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.28B no.11
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    • pp.913-924
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    • 1991
  • In this paper, we propose a motion estimation algorithm using hierarchical structure. The algorithm uses the image pyramids from the repetitive application of Gaussian filtering and decimation, and performs an inter-level displacement propagation in its motion estimation process. The motion estimation algorithm based on the hierarchical structure is shown to be very effective since this scheme utilizes the local imformation as well as the global imformation. The experimental results on the various data imdicate that compared to the Horn and Schunck's method, the proposed algorithm yields an accurate motion estimation with a fast convergence behaviour.

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Design of High Performance full search Motion Estimation VLSI with Half-pel (MP@ML Half-pel을 지원하는 고성능 완전 탐색 움직임 추정기 VLSI 설계)

  • 최홍규;남승현;이문기
    • Proceedings of the IEEK Conference
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    • pp.287-290
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    • 2002
  • The block matching algorithm motion estimation is a soft-core for hardwired motion estimation block in MPEG-2, H.261 encoder. This motion estimation has been tested and verified to be valid for implementation of FPGA. Efficiency performance of the synthesized motion estimation was up to 89%, and the average PSNR between the original image and the motion-compensated image is 38dB.

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Zoom Motion Estimation Method by Using Depth Information (깊이 정보를 이용한 줌 움직임 추정 방법)

  • Kwon, Soon-Kak;Park, Yoo-Hyun;Kwon, Ki-Ryong
    • Journal of Korea Multimedia Society
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    • v.16 no.2
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    • pp.131-137
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    • 2013
  • Zoom motion estimation of video sequence is very complicated for implementation. In this paper, we propose a method to implement the zoom motion estimation using together the depth camera and color camera. Depth camera obtains the distance information between current block and reference block, then zoom ratio between both blocks is calculated from this distance information. As the reference block is appropriately zoomed by the zoom ratio, the motion estimated difference signal can be reduced. Therefore, the proposed method is possible to increase the accuracy of motion estimation with keeping zoom motion estimation complexity not greater. Simulation was to measure the motion estimation accuracy of the proposed method, we can see the motion estimation error was decreased significantly compared to conventional block matching method.

Improving Performance of Digital Image Stabilization using Adoptive motion estimation Area selection (적응적 움직임 추정영역 선택을 사용한 영상안정화 성능개선)

  • Kim, Dong-Gyun;Lee, Jin-Hee;Yoo, Yoon-Jong;Paik, Joon-Ki
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.45 no.5
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    • pp.18-24
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    • 2008
  • In this paper we propose a novel method which improves digital image stabilization performance using adoptive selection of motion estimation area. Candidate area for motion estimation is decided and through two processes, multi image reference and edge energy distinction, final motion estimation area is selected. Then Motion estimation and compensation is following in selected area. Experimental results show that proposed method improves performance of digital image stabilization.

Full Search Equivalent Motion Estimation Algorithm for General-Purpose Multi-Core Architectures

  • Park, Chun-Su
    • Journal of the Semiconductor & Display Technology
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    • v.12 no.3
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    • pp.13-18
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    • 2013
  • Motion estimation is a key technique of modern video processing that significantly improves the coding efficiency significantly by exploiting the temporal redundancy between successive frames. Thread-level parallelism is a promising method to accelerate the motion estimation process for multithreading general-purpose processors. In this paper, we propose a parallel motion estimation algorithm which parallelizes the motion search process of the current H.264/AVC encoder. The proposed algorithm is implemented using the OpenMP application programming interface (API) and can be easily integrated into the current encoder. The experimental results show that the proposed parallel algorithm can reduce the processing time of the motion estimation up to 65.08% without any penalty in the rate-distortion (RD) performance.