CAJ | 학술논문

对于当前多种解决平移抖动的运动估计算法存在精度和效率难以兼顾，且在较大搜索窗口下易陷入局部最优，不适于大平移抖动图像稳定的问题，提出一种新的稳像算法。该算法采用菱形法匹配，大模板改进为六边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，采用自适应均值滤波实施补偿。通过算例验证，结果表明该法较穷尽法、三步法、四步法和传统菱形法具有更高的搜索效率；自适应滤波补偿相对于固定尺寸滤波更能兼顾到运动矢量波形变化的实时和平滑性；图像经该算法处理后的帧间 PSNR 值明显高于处理前，从而验证了该算法的正确性和可行性。
대우당전다충해결평이두동적운동고계산법존재정도화효솔난이겸고，차재교대수색창구하역함입국부최우，불괄우대평이두동도상은정적문제，제출일충신적은상산법。해산법채용릉형법필배，대모판개진위륙변형병대수색역분구후배서우선，채용최다양본통계법제취전국운동시량，채용자괄응균치려파실시보상。통과산례험증，결과표명해법교궁진법、삼보법、사보법화전통릉형법구유경고적수색효솔；자괄응려파보상상대우고정척촌려파경능겸고도운동시량파형변화적실시화평활성；도상경해산법처리후적정간 PSNR 치명현고우처리전，종이험증료해산법적정학성화가행성。
Since the traditional block matching method tends to fall into local optimum in the large search window and is diffi-cult to meet requirements of accuracy and efficiency,which is unsuitable to solve large shift jitter of image,this paper pro-posed a new image stabilization algorithm.The new method was still based on diamond search,but its pattern of large template was modified to hexagon pattern,and search domain was partitioned and sorted by size.In addition,it extracted global motion vector through maximum sample statistics and compensated through adaptive mean filter.At last,a numerical example is cal-culated to show that the new method has a higher search efficiency than exhaustive search,three-step search,four-step search and traditional diamond search.The real-time and smoothness of adaptive filter compensation are better than the one of fixed size.PSNR of images after processed is significantly higher than the one before processed.Therefore the results verify the ac-curacy and feasibility of the new method.