The capability of the motion-magnification technique for the detection of transverse oscillations, such as kink oscillations of solar coronal loops observed with an imaging telescope, in the sub-pixel regime is investigated. The technique is applied to artificial-image sequences imitating harmonic transverse displacements of the loop, observed in the optically thin regime. Motion magnification is found to work well on the analysis of sub-pixel, \(\geq 0.01\) pixel oscillations, and it is characterised by linear scaling between the magnified amplitude and input amplitude. Oscillations of loops with transverse density profiles of different steepness are considered. After magnification, the original transverse profiles are preserved sufficiently well. The motion-magnification performance is found to be robust in noisy data, for coloured noise with spectral indices ranging from 0 to 3, and additional Poisson noise with a signal-to-background-noise ratio down to unity. Our findings confirm the reliability of the motion-magnification technique for applications in magnetohydrodynamic seismology of the solar corona.

研究了运动放大技术在亚像素范围内检测横向振荡的能力，例如用成像望远镜观察到的日冕环的扭结振荡。该技术应用于模拟环路谐波横向位移的人工图像序列，在光学薄区域中观察到。发现运动放大在子像素分析中效果很好，\(\geq 0.01\) 像素振荡，其特点是放大幅度和输入幅度之间的线性缩放。考虑了具有不同陡度的横向密度分布的环路的振荡。放大后，原始横向轮廓被充分保留。发现运动放大性能在噪声数据中是稳健的，对于光谱指数范围为 0 到 3 的有色噪声，以及信噪比低至 1 的附加泊松噪声。我们的研究结果证实了运动放大技术在日冕磁流体动力地震学中应用的可靠性。