基于全相位IDCT濾波器的內(nèi)插重采樣分層編碼技術
A Hierarchical Coding Technique Based on All Phase IDCT Interpolation
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摘要: 該文提出了一種基于全相位逆離散余弦變換(APIDCT)內(nèi)插濾波器的重采樣分層編碼技術。全相位數(shù)字濾波器(APDF)是一種新型的線性相位濾波器。該文給出了APIDCT的設計方法,并通過比較幾種APDF的性能,證明APIDCT在圖像內(nèi)插方面性能優(yōu)異。在此內(nèi)插方法基礎上,結合重采樣和自適應算術編碼形成了分層圖像編碼技術,這種技術算法簡單,適用于空間可分級編碼。實驗結果表明僅用其中3層,重建圖像的峰值信噪比和壓縮率就可達到略優(yōu)于JPEG的效果,并且壓縮率高時也不會出現(xiàn)塊效應。Abstract: This paper proposes a hierarchical coding technique based on the All Phase Inverse Discrete Cosine Transform (APIDCT) interpolation. The All Phase Digital Filter (APDF) is a new type of linear phase filter. This paper compares the performances of several kinds of APDF and demonstrates that the APIDCT filter has the best performance in image interpolation. By combining the interpolation filter with multi-subsampling and adaptive arithmetic coding, a simple hierarchical image coding method is shaped up. This technique can be used to scalable coding in spatial resolution. Simulation results show that the compression ratio and restored image quality better than JPEG11 compression can be achieved by only three layers, and no block effect is found even in high compression ratio.
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Said A, Pearlman W A. An image multiresolution representatoin for lossless and lossy compression[J].IEEE Trans. on Image Processing.1996, 5(9):1303-[2]畢厚杰.靜止圖像編碼[J].通信學報,1993,14(2):48-54.[3]侯正信,王兆華,楊喜.全相位DFT數(shù)字濾波器的設計與實現(xiàn)[J].電子學報,2003,3l(4):539-543.[4]侯正信.離散余弦列率濾波器的設計及應用[J].天津大學學報,1999,32(3):324-328.[5]Croft L H, Robinson J A. Subband image coding using watershed and watercourse lines of the wavelet transform [J].IEEE Trans.on Image Processing.1994, 3(6):759- -
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