计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2010年
14期
8-11,30
,共5页
张峥嵘%孙玉宝%黄丽丽%韦志辉
張崢嶸%孫玉寶%黃麗麗%韋誌輝
장쟁영%손옥보%황려려%위지휘
图像恢复%全变差%快速傅里叶变换
圖像恢複%全變差%快速傅裏葉變換
도상회복%전변차%쾌속부리협변환
image restoration%total variation%fast Fourier transform
针对图像恢复的全变差(TV)模型提出了一种基于交替方向乘子法的快速求解算法.通过变量替换将TV模型转化为与之完全等价的等式约束优化问题,然后用交替方向乘子法求解等式约束优化问题.实验结果表明,相对于FTVd方法,克服了FTVd方法的不稳定性,视觉效果更好,信噪比也得到了提高.
針對圖像恢複的全變差(TV)模型提齣瞭一種基于交替方嚮乘子法的快速求解算法.通過變量替換將TV模型轉化為與之完全等價的等式約束優化問題,然後用交替方嚮乘子法求解等式約束優化問題.實驗結果錶明,相對于FTVd方法,剋服瞭FTVd方法的不穩定性,視覺效果更好,信譟比也得到瞭提高.
침대도상회복적전변차(TV)모형제출료일충기우교체방향승자법적쾌속구해산법.통과변량체환장TV모형전화위여지완전등개적등식약속우화문제,연후용교체방향승자법구해등식약속우화문제.실험결과표명,상대우FTVd방법,극복료FTVd방법적불은정성,시각효과경호,신조비야득도료제고.
An alternating direction method of multipliers based fast algorithm for total variation image restoration is presented.TV model is reformulated equivalently as an equality-constrainted program by variable substitution.Then the corresponding equalityconstrainted program is solved by alternating direction method of multipliers.Experimental results demonstrate the effectiveness both in the SNR value and the visual effect,compared with FINd method.
