Fast Image Resizing in Discrete Cosine Transform Domain with Spatial Relationship between DCT Block and its Sub-Blocks

摘要：

This paper presents a computational scalable approach to resize images by factors of P/Q×R/S in the discrete cosine transform (DCT) domain. Our resizing approach is based on the framework proposed by Mukherjee and Mitra which employs the spatial relationship between a DCT block and its sub-blocks. To simplify integration with block based coders such as JPEG and MPEG, N x N DCT blocks are discussed throughout this work. Our observation of the spatial relationship between a DCT block and its sub-blocks resulted in reduction of the computational cost to resize images. Also, we have suggested using up-sampled DCT blocks smaller than N×N to further reduce computational cost.

作者: Ee-Leng Tan Woon-Seng Gan Meng-Tong Wong

作者单位: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore Texas Instruments Singapore, Singapore

会议类型: 国际会议

会议名称: 2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)

会议地点: 镇江

会议语种:英文

页码: 1683-1687

在线出版日期: 2008-07-07（万方平台首次上网日期，不代表论文的发表时间）