CAJ | 학술논문

针对传统块匹配法在较大搜索窗口下易陷入局部最优，不适用于大平移抖动图像配准的问题，提出了一种新的块匹配搜索策略。该方法采用改进菱形法进行匹配，将大模板设计为环形并对搜索域分区后排序优选，采用最多样本统计法提取全局运动矢量。算例验证结果表明：该方法较穷尽法、三步法和传统菱形法具有更高的搜索效率；最多样本统计法有效避免了提取全局运动矢量时的前景干扰；图像经该算法处理后的帧间峰值信噪比明显高于处理前，从而验证了该算法的准确性和可行性。
침대전통괴필배법재교대수색창구하역함입국부최우，불괄용우대평이두동도상배준적문제，제출료일충신적괴필배수색책략。해방법채용개진릉형법진행필배，장대모판설계위배형병대수색역분구후배서우선，채용최다양본통계법제취전국운동시량。산례험증결과표명：해방법교궁진법、삼보법화전통릉형법구유경고적수색효솔；최다양본통계법유효피면료제취전국운동시량시적전경간우；도상경해산법처리후적정간봉치신조비명현고우처리전，종이험증료해산법적준학성화가행성。
Because the traditional block matching method in the larger search window tends to fall into lo-cal optimum,it is unsuitable to match the image of large pan shake,a new block matching search strate-gy is proposed,which is still based on diamond search,but the pattern of large template is modified to annularity,search domain is partitioned and sorted by size,global motion vector is extracted through maximum sample statistics.A numerical example is calculated to show that the method has a higher search efficiency than exhaustive search,three-step search and traditional diamond search;maximum sample statistics avoid the prospect interference effectively when global motion vectors are extracted;peak signal to noise ratio of images after processed is higher significantly than the one before processed.There-fore the results above verify the accuracy and feasibility of the algorithm.