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Image interpolation with high visual...

Wang, Qing.

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Image interpolation with high visual quality.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Image interpolation with high visual quality./
作者:	Wang, Qing.
面頁冊數:	172 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 1092.
Contained By:	Dissertation Abstracts International66-02B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ99566
ISBN:	9780612995666

Image interpolation with high visual quality.
Wang, Qing.

Image interpolation with high visual quality. - 172 p.

Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 1092.

Thesis (Ph.D.)--The University of British Columbia (Canada), 2005.

Image interpolation or resizing has wide applications in areas such as digital photography, the printing industry, HDTV and computer graphics. The traditional methods for image interpolation are known to suffer from visual artifacts that degrade the subjective quality of images. The goal of this research is to study and develop new image interpolation techniques that provide images with improved visual quality. In our study, we focus on the two most harmful artifacts resulting from traditional image interpolation, zigzagging and blurring.

ISBN: 9780612995666Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Image interpolation with high visual quality.
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500 $a Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 1092.
500 $a Adviser: Rabab K. Ward.
502 $a Thesis (Ph.D.)--The University of British Columbia (Canada), 2005.
520 $a Image interpolation or resizing has wide applications in areas such as digital photography, the printing industry, HDTV and computer graphics. The traditional methods for image interpolation are known to suffer from visual artifacts that degrade the subjective quality of images. The goal of this research is to study and develop new image interpolation techniques that provide images with improved visual quality. In our study, we focus on the two most harmful artifacts resulting from traditional image interpolation, zigzagging and blurring.
520 $a In developing the new interpolation method, we concentrate on visually oriented interpolation techniques. We explore the feature-oriented and content-adaptive approach emerging from recent studies on image interpolation.
520 $a To find out why and how zigzagging arises, we first study the isophotes, i.e., the equi-intensity contours, of interpolated images. Based on this analysis, we design an interpolation scheme that employs interpolation grid that adapt to the orientation of image isophotes. This method yields much smoother isophotes in the interpolated images than the traditional interpolation methods. As a result, the zigzagging artifacts are largely suppressed.
520 $a To remove the blurring effect, we propose a method of enhancing the contrast of expanded images. To do so, we first discuss the properties an edge-sharpening function should satisfy. From these we choose a family of edge-sharpening functions that have the desired properties. The proposed contrast enhancement method proves to be effective in removing the blur.
520 $a We also show that evaluations based on the mean squared error (MSE) are not effective, thus we employ and improve the curvature-based measures to evaluate the performance of the proposed interpolation method. The experiments and analysis show that our proposed interpolation method is visually superior to traditional methods, and provide interpolated images with high visual quality.
590 $a School code: 2500.
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710 2 0 $a The University of British Columbia (Canada). $3 626643
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