CAJ | 학술논문

亚像素级配准是超分辨率重构的前提，其中旋转角估计的准确程度对重构效果有直接影响。针对传统的频域内旋转角估计在小角度估计不精确的缺点，提出了用部分幅值进行配准的改进算法。实验结果表明，改进算法对小角度旋转角估计比传统算法效果好。
아상소급배준시초분변솔중구적전제，기중선전각고계적준학정도대중구효과유직접영향。침대전통적빈역내선전각고계재소각도고계불정학적결점，제출료용부분폭치진행배준적개진산법。실험결과표명，개진산법대소각도선전각고계비전통산법효과호。
Sub-pixel image registration is an essential part of super-resolution image reconstruction algorithms. Unfortunately, when the rotation angel between input images is small, the conventional frequency domain algorithms cannot obtain an accurate estimation. Thus, an improved approach is proposed by taking into account both the high frequency and low frequency coeffi-cients. The numerical results show that the proposed algorithm has a better performance in estimating the small rotation angles.