Due to the growing availability of face anti-spoofing databases, researchers
are increasingly focusing on video-based methods that use hundreds to thousands
of images to assess their impact on performance. However, there is no clear
consensus on the exact number of frames in a video required to improve the
performance of face anti-spoofing tasks. Inspired by the visual saliency
theory, we present a video summarization method for face anti-spoofing tasks
that aims to enhance the performance and efficiency of deep learning models by
leveraging visual saliency. In particular, saliency information is extracted
from the differences between the Laplacian and Wiener filter outputs of the
source images, enabling identification of the most visually salient regions
within each frame. Subsequently, the source images are decomposed into base and
detail layers, enhancing representation of important information. The weighting
maps are then computed based on the saliency information, indicating the
importance of each pixel in the image. By linearly combining the base and
detail layers using the weighting maps, the method fuses the source images to
create a single representative image that summarizes the entire video. The key
contribution of our proposed method lies in demonstrating how visual saliency
can be used as a data-centric approach to improve the performance and
efficiency of face presentation attack detection models. By focusing on the
most salient images or regions within the images, a more representative and
diverse training set can be created, potentially leading to more effective
models. To validate the method's effectiveness, a simple deep learning
architecture (CNN-RNN) was used, and the experimental results showcased
state-of-the-art performance on five challenging face anti-spoofing datasets.

通过提取视觉显著性信息，利用基于加权融合的视频摘要方法改进人脸防伪识别模型的性能和效率，以面向数据的方式提供一种有效的训练集，通过 CNN-RNN 架构在五个具有挑战性的人脸防伪数据集上取得了最先进的表现。