Efficient method for DCT-domain image arbitrary downsampling

DU Yao-gang1; CAI An-ni2

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Efficient method for DCT-domain image arbitrary downsampling

更新时间：2024-10-14

- Efficient method for DCT-domain image arbitrary downsampling
- Issue 7, Pages: 123-128(2007)
- 作者机构：
  
  北京电子科技学院基础部 2. 北京邮电大学电信工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.8
- Published：2007
- 稿件说明：
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DU Yao-gang1, CAI An-ni2. Efficient method for DCT-domain image arbitrary downsampling[J]. 2007, (7): 123-128.
DOI：

DU Yao-gang1, CAI An-ni2. Efficient method for DCT-domain image arbitrary downsampling[J]. 2007, (7): 123-128. DOI：

摘要

提出了一种新DCT域任意m:n比率的下采样方法

即直接找出输入m 2个块与下采样输出的n 2个的块的DCT系数关系式。实验结果表明:本方法的重构图像的峰值信噪比(PNSR)优于Park方法0.5dB

且有较低的计算复杂性

适用于任何基于DCT压缩的视频转码方案。

Abstract

A novel approach to resize Images with m/n resizing ratio in the DCT domain

was proposed which expoits the relationship of DCT coefficients between m 2input blocks and n 2output blocks.Experimental results confirm that the scheme performs about 0.5dB better than Park’s method in terms of PNSR of reconstructed image with a comparable computational speed.The proposed method can be used to any DCT-based compressed video transcoding applications.

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College of Information Science and Engineering,Shandong University of Science and Technology

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