基于小波与嵌入式零树编码的锈蚀图像压缩方法  

Method of Rust Image Compression Based on Wavelet and Embedded Zero-tree Coding

作　　者：陈法法 李振 成孟腾 陈保家 肖文荣 CHEN Fafa;LI Zhen;CHENG Mengteng;CHEN Baojia;XIAO Wenrong(Hubei Key Laboratory of Hydroelectric Machinery Design&Maintenance,China Three Gorges Univ.,Yichang 443002,China)

机构地区：[1]三峡大学水电机械设备设计与维护湖北省重点实验室,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2023年第1期94-100,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(51975324);湖北省教育厅科研项目(B2021036);宜昌市自然科学研究项目(A21-3-002);水电机械设备设计与维护湖北省重点实验室开放基金(2021KJX07)。

摘　　要：为了提高高分辨率锈蚀图像的传输效率和处理速度,设计了一种基于小波和嵌入式零树编码的锈蚀图像压缩方法.首先,将原始锈蚀图像的RGB颜色空间转换为YCbCr颜色空间,并对Y、Cb、Cr三通道分量进行小波分解,得到对应的小波系数;其次,结合对比敏感度函数对不同子带的小波系数进行加权处理,利用嵌入式零树算法对小波系数进行量化和编码得到码流;最后,对码流依次进行解码、反量化和逆变换,得到Y、Cb、Cr颜色空间的重构图像,并将其还原至RGB颜色空间,得到压缩后的图像.实验结果表明,本文算法与传统压缩算法相比,能有效降低图像的储存空间,减少细节丢失,保证了压缩后的图像质量,在压缩比和图像质量上都有较大提高,更适用于工业领域锈蚀图像的压缩.In order to improve the transmission efficiency and the processing speed of high-resolution rust images,a rust image compression method based on wavelet and embedded zero-tree coding is designed.Firstly,the RGB color space of the original rust image is converted into the YCbCr color space,and the three-channel components of Y,Cb,and Cr are subjected to wavelet decomposition to obtain the corresponding wavelet coefficients.Secondly,combined with the contrast sensitivity function,the wavelet coefficients of the different sub-bands are weighted,and the embedded zero-tree algorithm is adopted to quantize and encode the wavelet coefficients in order to obtain the code stream.Finally,the code stream is decoded,inverse quantized and inverse transformed in turn to obtain the reconstructed image in the Y,Cb,Cr color space,and it is restored to the RGB color space.Furthermore,the compressed image can be obtained.The experimental results show that the proposed method in this paper can reduce the storage space of the image and the loss of details effectively,and ensure the quality of the compressed image compared with the traditional compression algorithm.The compression ratio and the image quality are greatly improved,and it is more suitable for the rust image compression in industrial fields.

关 键 词：锈蚀图像 小波变换 嵌入式零树编码 图像压缩 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]