Optimum Coefficients Of Discrete Orthogonal Tchebichef Moment Transform To Improve The Performance Of Image Compression

Malaysian Journal of Computer Science

A.Abudhahir¹  AHRagamathunisa Begum¹  D.Manimegalai¹ 

关键词: Image compression;    optimisation;    orthogonal moments;    discrete Tchebichef moments;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: University of Malaya * Faculty of Computer Science and Information Technology

【 摘 要 】

This paper proposes an improved image compression scheme which utilizes optimum coefficients of discreteorthogonal Tchebichef moment transform. In the conventional moments-based-compression techniques, aftermaking a trade-off between the conflicting factors, namely the quality of the reconstructed image and thecompression ratio, the moments are chosen sequentially up to the desired order for reconstruction. But, as faras this proposed method is concerned, for reconstruction, it utilizes the optimally selected Tchebichef MomentTransform coefficients that yield better quality output image with a reasonable peak-signal-to-noise ratio for adesired value of compression ratio. Standard test images of different classes with various sizes (128x128,256x256, 512x512 and 1024x1024) have been subjected to the proposed compression method for the block sizes4x4 and 8x8 in order to assess its performance. The standard performance measures such as compression ratio,mean square error and peak-signal-to-noise ratio are considered in this study. The results reveal that theproposed method vis-à-vis the task of compression performs invariably well for the different classes of inputimages of above-mentioned sizes.

【 授权许可】

Unknown