A novel image matching method is proposed that utilizes learned features
extracted by an off-the-shelf deep neural network to obtain a promising
performance. The proposed method uses pre-trained VGG architecture as a feature
extractor and does not require any additional training specific to improve
matching. Inspired by well-established concepts in the psychology area, such as
the Mental Rotation paradigm, an initial warping is performed as a result of a
preliminary geometric transformation estimate. These estimates are simply based
on dense matching of nearest neighbors at the terminal layer of VGG network
outputs of the images to be matched. After this initial alignment, the same
approach is repeated again between reference and aligned images in a
hierarchical manner to reach a good localization and matching performance. Our
algorithm achieves 0.57 and 0.80 overall scores in terms of Mean Matching
Accuracy (MMA) for 1 pixel and 2 pixels thresholds respectively on Hpatches
dataset, which indicates a better performance than the state-of-the-art.

本文提出了一种新颖的图像匹配方法，利用预先训练的 VGG 神经网络提取图像特征，在首次较好的几何转换估计后，再以分层的方式重复运用该方法，达到良好的本地化和匹配性能。该算法在 Hpatches 数据集上达到了 0.57 和 0.80 的平均匹配准确性分数，表现优于现有技术。