tailieunhanh - Báo cáo hóa học: " Multiresolution Motion Estimation for Low-Rate Video Frame Interpolation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Multiresolution Motion Estimation for Low-Rate Video Frame Interpolation | EURASIP Journal on Applied Signal Processing 2004 11 1708-1720 2004 Hindawi Publishing Corporation Multiresolution Motion Estimation for Low-Rate Video Frame Interpolation Hezerul Abdul Karim Faculty of Engineering Multimedia University 63100 Cyberjaya Selangor Malaysia Email hezerul@ Michel Bister Division of Engineering The University of Nottingham Malaysia Campus Wisma MISC 50450 Kuala Lumpur Malaysia Email Mohammad Umar Siddiqi Faculty of Engineering Multimedia University 63100 Cyberjaya Selangor Malaysia Email umar@ Received 22 October 2003 Revised 18 February 2004 Recommended for Publication by C. C. Jay Kuo Interpolation of video frames with the purpose of increasing the frame rate requires the estimation of motion in the image so as to interpolate pixels along the path of the objects. In this paper the specific challenges of low-rate video frame interpolation are illustrated by choosing one well-performing algorithm for high-frame-rate interpolation Castango 1996 and applying it to low frame rates. The degradation of performance is illustrated by comparing the original algorithm the algorithm adapted to low frame rate and simple averaging. To overcome the particular challenges of low-frame-rate interpolation two algorithms based on multiresolution motion estimation are developed and compared on objective and subjective basis and shown to provide an elegant solution to the specific challenges of low-frame-rate video interpolation. Keywords and phrases low-rate video frame interpolation multiresolution motion estimation. 1. INTRODUCTION Low frame rates for example 10 frames per second fps are of interest in low-bit-rate video compression. Reducing the frame rate to 5 fps and interpolating it back to 10 fps at the receiver helps to reduce the transmission bit rate. In order to achieve very low data rates for video communication such as in plain old telephone service it is necessary to skip images at the .

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