论文标题

注意力模糊:不均匀图像修复的提升机制

Blur-Attention: A boosting mechanism for non-uniform blurred image restoration

论文作者

Li, Xiaoguang, Yang, Feifan, Lam, Kin Man, Zhuo, Li, Li, Jiafeng

论文摘要

动态场景在计算机视觉中是一个具有挑战性的问题。很难通过传统方法准确地估计空间变化的模糊内核。基于数据驱动的方法通常采用无内核的端到端映射方案,这些方案易于忽略内核估计。为了解决这个问题,我们提出了一个模糊的注意模块,以动态捕获非均匀模糊图像的空间变化特征。该模块由一个密集的单元和具有多功能特征融合的空间注意单元组成,该单元可以有效地提取复杂的空间变化的模糊特征。我们设计了多层残留连接结构,以连接多个模糊的注意模块以形成一个模糊的注意网络。通过将模糊的注意网络引入条件产生的对抗框架中,我们提出了一种端到端的盲运动脱毛方法,即模糊注意力(袋),以进行单个图像。我们的方法可以根据空间变化的模糊特征自适应地选择提取特征的权重,并动态恢复图像。实验结果表明,我们方法的脱张能力在PSNR,SSIM和主观视觉质量方面实现了出色的客观性能。此外,通过可视化模糊模块提取的特征,就其有效性提供了全面的讨论。

Dynamic scene deblurring is a challenging problem in computer vision. It is difficult to accurately estimate the spatially varying blur kernel by traditional methods. Data-driven-based methods usually employ kernel-free end-to-end mapping schemes, which are apt to overlook the kernel estimation. To address this issue, we propose a blur-attention module to dynamically capture the spatially varying features of non-uniform blurred images. The module consists of a DenseBlock unit and a spatial attention unit with multi-pooling feature fusion, which can effectively extract complex spatially varying blur features. We design a multi-level residual connection structure to connect multiple blur-attention modules to form a blur-attention network. By introducing the blur-attention network into a conditional generation adversarial framework, we propose an end-to-end blind motion deblurring method, namely Blur-Attention-GAN (BAG), for a single image. Our method can adaptively select the weights of the extracted features according to the spatially varying blur features, and dynamically restore the images. Experimental results show that the deblurring capability of our method achieved outstanding objective performance in terms of PSNR, SSIM, and subjective visual quality. Furthermore, by visualizing the features extracted by the blur-attention module, comprehensive discussions are provided on its effectiveness.

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