计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2009年
15期
227-228,231
,共3页
逆半调%有序抖动%Laplacian金字塔%滤波器组
逆半調%有序抖動%Laplacian金字塔%濾波器組
역반조%유서두동%Laplacian금자탑%려파기조
inverse halftoning%order dithering%Laplacian pyramid%filter banks
针对有序抖动半调图,提出一种基于Laplacian金字塔的逆半调方法.采用分治策略,利用Laplacian金字塔变换将图像分成低频和高频区域,通过滤波器组抑制高频噪声,同时保持图像边缘,改善逆半调图像的质量.实验证明,该算法具有时空复杂度较低、峰值信噪比高等特点.
針對有序抖動半調圖,提齣一種基于Laplacian金字塔的逆半調方法.採用分治策略,利用Laplacian金字塔變換將圖像分成低頻和高頻區域,通過濾波器組抑製高頻譟聲,同時保持圖像邊緣,改善逆半調圖像的質量.實驗證明,該算法具有時空複雜度較低、峰值信譟比高等特點.
침대유서두동반조도,제출일충기우Laplacian금자탑적역반조방법.채용분치책략,이용Laplacian금자탑변환장도상분성저빈화고빈구역,통과려파기조억제고빈조성,동시보지도상변연,개선역반조도상적질량.실험증명,해산법구유시공복잡도교저、봉치신조비고등특점.
For order dithering halftone images, an inverse halftoning algorithm based on Laplacian pyramid is proposed. With the idea of dividing and treating respectively, Laplacian pyramid is used to transform the halftone image into low-frequency information and high-frequency information. To improve the quality of inverse halftoning image, filter banks are employed to remove the noise and at the same time preserve the edges. Experiments show that the proposed algorithm has the advantages of low implementation cost and high peak signal-to-noise ratio.
