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Analysis and reduction of moire patt...

Liu, Xiangdong.

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Analysis and reduction of moire patterns in scanned halftone pictures.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Analysis and reduction of moire patterns in scanned halftone pictures./
作者:	Liu, Xiangdong.
面頁冊數:	206 p.
附註:	Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4606.
Contained By:	Dissertation Abstracts International57-07B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9637451
ISBN:	0591031531

Analysis and reduction of moire patterns in scanned halftone pictures.
Liu, Xiangdong.

Analysis and reduction of moire patterns in scanned halftone pictures. - 206 p.

Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4606.

Thesis (Ph.D.)--Virginia Polytechnic Institute and State University, 1996.

In this dissertation we provide a comprehensive theory for the formation of a moire pattern in a sampled halftone image. We explore techniques for restoring a sampled halftone image with a moire pattern and techniques for preventing a moire pattern when a halftone picture is scanned. Specifically, we study the frequency, phase, and spatial geometry of a moire pattern. We observe and explain the half period phase reversal phenomenon that a moire pattern may exhibit. As a case study, we examine the moire patterns generated by a commercial scanner. We propose three restoration methods, including a notch filtering method, a simulation method, and a relaxation method. We also describe a moire prevention method, the partial inverse Fourier transform method. Finally, we propose a research agenda for further investigation.

ISBN: 0591031531Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Analysis and reduction of moire patterns in scanned halftone pictures.
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500 $a Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4606.
500 $a Chairman: Roger Ehrich.
502 $a Thesis (Ph.D.)--Virginia Polytechnic Institute and State University, 1996.
520 $a In this dissertation we provide a comprehensive theory for the formation of a moire pattern in a sampled halftone image. We explore techniques for restoring a sampled halftone image with a moire pattern and techniques for preventing a moire pattern when a halftone picture is scanned. Specifically, we study the frequency, phase, and spatial geometry of a moire pattern. We observe and explain the half period phase reversal phenomenon that a moire pattern may exhibit. As a case study, we examine the moire patterns generated by a commercial scanner. We propose three restoration methods, including a notch filtering method, a simulation method, and a relaxation method. We also describe a moire prevention method, the partial inverse Fourier transform method. Finally, we propose a research agenda for further investigation.
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