西安电子科技大学学报(自然科学版)
西安電子科技大學學報(自然科學版)
서안전자과기대학학보(자연과학판)
JOURNAL OF XIDIAN UNIVERSITY(NATURAL SCIENCE)
2010年
2期
300-304
,共5页
图像处理%去噪%小波变换%波原子%平移不变性%循环平移
圖像處理%去譟%小波變換%波原子%平移不變性%循環平移
도상처리%거조%소파변환%파원자%평이불변성%순배평이
image processing%denoising%wavelet transforms%wave atoms%translation invariance%cycle spinning
结合波原子变换和Cycle Spinning的优点,提出一种新的图像去噪算法.由于波原子变换缺乏平移不变性,直接进行系数阈值去噪会在去噪图像边缘产生伪吉普斯现象,导致图像的失真.该算法引入Cycle Spinning技术有效抑制这种视觉失真,对原始含噪图像进行波原子硬阈值去噪.实验结果表明,与单一波原子变换、小波Cycle Spinning方法相比,新算法能够在去除噪声的同时保留边缘,有效抑制了传统去噪方法的伪吉普斯现象,视觉效果也能得到较好的改善.对强噪声级的图像,这种优势更为明显.
結閤波原子變換和Cycle Spinning的優點,提齣一種新的圖像去譟算法.由于波原子變換缺乏平移不變性,直接進行繫數閾值去譟會在去譟圖像邊緣產生偽吉普斯現象,導緻圖像的失真.該算法引入Cycle Spinning技術有效抑製這種視覺失真,對原始含譟圖像進行波原子硬閾值去譟.實驗結果錶明,與單一波原子變換、小波Cycle Spinning方法相比,新算法能夠在去除譟聲的同時保留邊緣,有效抑製瞭傳統去譟方法的偽吉普斯現象,視覺效果也能得到較好的改善.對彊譟聲級的圖像,這種優勢更為明顯.
결합파원자변환화Cycle Spinning적우점,제출일충신적도상거조산법.유우파원자변환결핍평이불변성,직접진행계수역치거조회재거조도상변연산생위길보사현상,도치도상적실진.해산법인입Cycle Spinning기술유효억제저충시각실진,대원시함조도상진행파원자경역치거조.실험결과표명,여단일파원자변환、소파Cycle Spinning방법상비,신산법능구재거제조성적동시보류변연,유효억제료전통거조방법적위길보사현상,시각효과야능득도교호적개선.대강조성급적도상,저충우세경위명현.
A new method for image denoising is presented,which colligates the strongpoint of the wave atoms transform and Cycle Spinning.Due to lack of translation invariance of the wave atoms transform,image denoising by coefficient thresholding would lead to Pseudo-Gibbs phenomena.Cycle Spinning is employed to avoid the artifacts.Experimental results show that the method can remove noisy and remaining edges,while Pseudo-Gibbs phenomena are controled efficiently,and can get a better visual effect and PSNR gains compared with the methods like simplex wave atoms or wavelet denoising using Cycle Spinning.And in heavy background noise,this advantage is significant.