中国图象图形学报A
中國圖象圖形學報A
중국도상도형학보A
JOURNAL OF IMAGE AND GRAPHICS
2009年
12期
2497-2502
,共6页
全局运动估计%抽样模板%迭代算法%运动模型
全跼運動估計%抽樣模闆%迭代算法%運動模型
전국운동고계%추양모판%질대산법%운동모형
global motion estimation%subsampling pattern%iterative algorithm%motion model
在目标跟踪、视频编码等领域都需要对全局运动进行快速准确的估计.针对既有摄像机运动又有前景物体运动的视频图像序列的全局运动估计问题,提出了一种新的全局运动估计算法.该新算法先采用3层金字塔进行多分辨率计算;然后在每层运算中都采用基于块的去外点法来有效去除外点.为了提高运算速度,在金字塔下面两层中还分别采用四皇后、八皇后模板抽取背景像素,只有被抽到的像素才参与迭代计算.通过对比试验可以看到,该算法在不降低精度的情况下,大大提高了估计速度,达到了实时性要求.
在目標跟蹤、視頻編碼等領域都需要對全跼運動進行快速準確的估計.針對既有攝像機運動又有前景物體運動的視頻圖像序列的全跼運動估計問題,提齣瞭一種新的全跼運動估計算法.該新算法先採用3層金字塔進行多分辨率計算;然後在每層運算中都採用基于塊的去外點法來有效去除外點.為瞭提高運算速度,在金字塔下麵兩層中還分彆採用四皇後、八皇後模闆抽取揹景像素,隻有被抽到的像素纔參與迭代計算.通過對比試驗可以看到,該算法在不降低精度的情況下,大大提高瞭估計速度,達到瞭實時性要求.
재목표근종、시빈편마등영역도수요대전국운동진행쾌속준학적고계.침대기유섭상궤운동우유전경물체운동적시빈도상서렬적전국운동고계문제,제출료일충신적전국운동고계산법.해신산법선채용3층금자탑진행다분변솔계산;연후재매층운산중도채용기우괴적거외점법래유효거제외점.위료제고운산속도,재금자탑하면량층중환분별채용사황후、팔황후모판추취배경상소,지유피추도적상소재삼여질대계산.통과대비시험가이간도,해산법재불강저정도적정황하,대대제고료고계속도,체도료실시성요구.
Fast and accurate estimation of global motion is necessary in target tracking, video coding and etc. Considering the global motion estimation of video with both camera motion and foreground objects motion, a new global motion estimation algorithm is proposed. In the algorithm a three-level pyramid is utilized. Then outliers are effectively eliminated with the block-based methods in the calculation of each pyramid level. In order to accelerate the algorithm,4-Queen and 8-Queen patterns are also used to sample background pixels respectively on the intermediate level and the base level, and only the extracted pixels are contributed to the iterative calculation. The experimental results show that the algorithm improved the estimation speed greatly without reducing the accuracy and satisfied the real-time request.
