窄带宽环境下JPEG2000图像频域压缩方法研究

摘要

In the past,the JPEG2000 image compression method in frequency domain can not achieve high level compression in the narrow bandwidth environment.Therefore,a high level of narrow bandwidth environment JPEG2000 image compression method in frequency domain is proposed.The EBCOT method was selectsed as the JPEG2000 image compression coding method in frequency domain,and mainly uses the EBCOT method to study the lossy compression.EBCOT method for lossy compression encoding process is divided into block encoding and packaging,sampling and preprocessing operation the color conversion of JPEG2000 image frequency domain block encoding,after pretreatment of the sampling frequency will stream user interest point marking,stream segmentation and encoding,the building block.Packaging is the segmentation,encoding and distribution of the block into,the realization process of JPEG2000 image compression in frequency domain narrow band environment.The experimental results show that the proposed method can achieve a high level of image compression in frequency domain,and solve the problem of image information receiving and dispatching.%以往研究出的JPEG2000图像频域压缩方法,大多无法在窄带宽环境下实现高水准的压缩.因此,提出高水准的窄带宽环境下JPEG2000图像频域压缩方法.该方法选取EBCOT方法作为JPEG2000图像频域压缩编码方法,主要利用EBCOT方法对有损压缩进行研究.EBCOT方法的有损压缩编码流程分为块编码和分装,块编码对JPEG2000图像频域采样进行色彩变换的预处理操作,预处理后的频域采样码流将进行用户兴趣点标记、码流切分和编码,生成块摘要.分装是对块摘要进行切分、编码和分配装入,实现窄带宽环境下JPEG2000图像频域压缩的过程.经实验结果分析可知,所提方法能够实现高水准的图像频域压缩,解决图像信息收发难题.