使用彎曲距離二項式近似法之視訊格式轉換器設計

design of a scan converter using the second order polynomial approximation with warped distance

蘇育輝(Yu-Hui Su)

指導教授 ： 蔡明傑

大同大學/電機資訊學院/電機工程學系所/碩士(2008年)

摘要

現今的數位顯示技術中，內插演算法是對影像縮放而言，非常重要的技術，尤其是近年來液晶螢幕的尺寸的越來越大。然而傳統的內插演算法擁有非常嚴重的缺點，包括邊緣的格狀效應以及影像的模糊狀態等等。因此為了要提高影像品質，本研究旨提出了一種使用邊緣模型的多項式內插法來做影像縮放的處理，以改善邊緣的銳力度及影像的清晰度。研究結果顯示本研究所提出的方法在影像的清晰度與邊緣銳力度上都優於傳統演算法，至於硬體實現的複雜度也相較簡單。

關鍵字

格狀效應 ； 多項式近似法 ； 邊緣模型 ； 影像相似度

並列摘要

With the increasing use of digital monitor technique, requirements for image interpolation have become more critical. Especially, the development of LCD screen sizes has grown up. However, the traditional algorithms have several serious disadvantages. First of all, the blocking effect and poor quality exist throughout the results. Therefore, in order to enhance quality of image. In the thesis, we present the second order polynomial approximation by used edge model. This method improves sharp of edge and resolution of image. The findings show that the propose method can reduce complex and that have high quality.

並列關鍵字

blicking effect ； polynomial approximation ； Edge model ； PSNR

參考文獻

[2] B. Scarborough, and J. Blaine, Numerical mathematical analysis, Johns Hopkins Press, Baltimore, 1985.

[3] A. Pratt, and K. William, Digital image processing, Wiley, N.Y., 1978.

[4] R. Keys, “Cubic Convolution Interpolation for Digital Image Processing,” IEEE Trans. Signal Processing, vol. 29, pp. 1153 - 1160, 1981.

[5] M. Ekstrom, and P. Michael, Digital image processing techniques, Academic Press, New York, 1984.

[6] J. W. Hwang and H. S. Lee, “Adaptive Image Interpolation Based on Local Gradient Features,” IEEE Signal Processing Letters, vol. 11, pp. 359-362, 2004