  Video Motion Magnification (VMM) aims to break the resolution limit of human
visual perception capability and reveal the imperceptible minor motion that
contains valuable information in the macroscopic domain. However, challenges
arise in this task due to photon noise inevitably introduced by photographic
devices and spatial inconsistency in amplification, leading to flickering
artifacts in static fields and motion blur and distortion in dynamic fields in
the video. Existing methods focus on explicit motion modeling without
emphasizing prioritized denoising during the motion magnification process. This
paper proposes a novel dynamic filtering strategy to achieve static-dynamic
field adaptive denoising. Specifically, based on Eulerian theory, we separate
texture and shape to extract motion representation through inter-frame shape
differences, expecting to leverage these subdivided features to solve this task
finely. Then, we introduce a novel dynamic filter that eliminates noise cues
and preserves critical features in the motion magnification and amplification
generation phases. Overall, our unified framework, EulerMormer, is a pioneering
effort to first equip with Transformer in learning-based VMM. The core of the
dynamic filter lies in a global dynamic sparse cross-covariance attention
mechanism that explicitly removes noise while preserving vital information,
coupled with a multi-scale dual-path gating mechanism that selectively
regulates the dependence on different frequency features to reduce spatial
attenuation and complement motion boundaries. We demonstrate extensive
experiments that EulerMormer achieves more robust video motion magnification
from the Eulerian perspective, significantly outperforming state-of-the-art
methods. The source code is available at
https://github.com/VUT-HFUT/EulerMormer.
