论文标题
VQFR:带有矢量定量词典和平行解码器的盲面修复
VQFR: Blind Face Restoration with Vector-Quantized Dictionary and Parallel Decoder
论文作者
论文摘要
尽管最近的生成面部先验和几何事物最近证明了盲面修复的高质量结果,但忠实于投入的细粒度细节仍然是一个具有挑战性的问题。由基于经典词典的方法和最近的矢量量化(VQ)技术激励,我们提出了一种基于VQ的面部恢复方法-VQFR。 VQFR利用从高质量面孔中提取的高质量低级特征银行,因此可以帮助恢复现实的面部细节。但是,通过忠实的细节和身份保存,VQ代码簿的简单应用无法取得良好的结果。因此,我们进一步介绍了两个特殊的网络设计。 1)。我们首先研究了VQ代码簿中的压缩补丁大小,并发现使用适当的压缩补丁大小设计的VQ代码簿对于平衡质量和忠诚度至关重要。 2)。为了进一步融合来自输入的低级功能,而不是“污染” VQ CodeBook生成的现实细节,我们提出了一个由纹理解码器和主要解码器组成的并行解码器。然后,这两个解码器与具有变形卷积的纹理翘曲模块进行交互。拟议的VQFR配备了VQ Codebook作为面部细节词典和并行解码器设计,可以在很大程度上提高面部细节的恢复质量,同时保持对先前方法的保真度。
Although generative facial prior and geometric prior have recently demonstrated high-quality results for blind face restoration, producing fine-grained facial details faithful to inputs remains a challenging problem. Motivated by the classical dictionary-based methods and the recent vector quantization (VQ) technique, we propose a VQ-based face restoration method - VQFR. VQFR takes advantage of high-quality low-level feature banks extracted from high-quality faces and can thus help recover realistic facial details. However, the simple application of the VQ codebook cannot achieve good results with faithful details and identity preservation. Therefore, we further introduce two special network designs. 1). We first investigate the compression patch size in the VQ codebook and find that the VQ codebook designed with a proper compression patch size is crucial to balance the quality and fidelity. 2). To further fuse low-level features from inputs while not "contaminating" the realistic details generated from the VQ codebook, we proposed a parallel decoder consisting of a texture decoder and a main decoder. Those two decoders then interact with a texture warping module with deformable convolution. Equipped with the VQ codebook as a facial detail dictionary and the parallel decoder design, the proposed VQFR can largely enhance the restored quality of facial details while keeping the fidelity to previous methods.