tailieunhanh - Báo cáo hóa học: " Research Article A Framework for the Assessment of Temporal Artifacts in Medium Frame-Rate Binary Video Halftones"

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: Research Article A Framework for the Assessment of Temporal Artifacts in Medium Frame-Rate Binary Video Halftones | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2010 Article ID 625191 11 pages doi 2010 625191 Research Article A Framework for the Assessment of Temporal Artifacts in Medium Frame-Rate Binary Video Halftones Hamood-Ur Rehman and Brian L. Evans Wireless Networking and Communications Group Department of Electrical and Computer Engineering The University of Texas at Austin Austin TX 78712 USA Correspondence should be addressed to Hamood-Ur Rehman rehman@ Received 1 May 2010 Accepted 2 August 2010 Academic Editor Zhou Wang Copyright 2010 H. Rehman and B. L. Evans. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Display of a video having a higher number of bits per pixel than that available on the display device requires quantization prior to display. Video halftoning performs this quantization so as to reduce visibility of certain artifacts. In many cases visibility of one set of artifacts is decreased at the expense of increasing the visibility of another set. In this paper we focus on two key temporal artifacts flicker and dirty-window-effect in binary video halftones. We quantify the visibility of these two artifacts when the video halftone is displayed at medium frame rates 15 to 30 frames per second . We propose new video halftoning methods to reduce visibility of these artifacts. The proposed contributions are 1 an enhanced measure of perceived flicker 2 a new measure of perceived dirty-window-effect 3 a new video halftoning method to reduce flicker and 4 a new video halftoning method to reduce dirty-window-effect. 1. Introduction Bit-depth reduction must be performed when the number of bits pixel bit-depth of the original video data is higher than the bit-depth available on the display device. Halftoning is a process that can perform this .

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