Performance Analysis for Image Size Conversion Using Lapped Transforms

摘要：

The size conversion method for images using lapped transforms provides superior performance than the conventional resizing method in the DCT domain. In this paper, the theoretical analysis is given for the resizing method in the lapped transform domain. It is shown that the resizing method in the lapped transform domain provides much better impulse responses and frequency responses than the conventional methods in the DCT domain. Computer simulations show that the conversion method in the lapped transform domain significantly improves the peak signal to noise ratio (PSNR) results. Specifically, the proposed method reduces the blocking effect to very low level in the conversion process, if it is used to convert the images which are compressed at low bit rates.

作者: Chang Woo Lee

作者单位: School of Information, Communications and Electronics Engineering The Catholic University of KoreaBucheon-City, Kyunggi-do, Korea

会议类型: 国际会议

会议名称: 2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)

会议地点: 广西桂林

会议语种:英文

页码: 74-78

在线出版日期: 2006-06-25（万方平台首次上网日期，不代表论文的发表时间）