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arXiv 2002.06518cs.CV
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用于噪声人脸超分辨率的人脸属性胶囊

Facial Attribute Capsules for Noise Face Super Resolution

Xidian University(西安电子科技大学);Tencent AI Lab(腾讯人工智能实验室)

Jingwei Xin, Nannan Wang, Xinrui Jiang, Jie Li, Xinbo Gao, Zhifeng Li

摘要:

现有的人脸超分辨率(SR)方法主要假设输入图像是无噪声的。当应用于输入图像总是被噪声污染的真实场景时,它们的性能急剧下降。本文提出了一种人脸属性胶囊网络(FACN)来解决含噪人脸图像的高尺度超分辨率问题。胶囊是一组神经元,其活动向量模拟同一实体的不同属性。受胶囊概念的启发,本文提出了一种人脸信息的综合表示模型--人脸属性胶囊(Facial Attribute Capsule,FAC)。在SR处理中,我们首先从输入LR脸生成一组FACs,然后从这组FACs重建HR脸。为了有效地提高FAC对噪声的鲁棒性,本文采用综合学习策略,从语义、概率和人脸属性三个方面生成FAC。每个FAC可以分为两个子胶囊:语义胶囊(SC)和概率胶囊(PC)。它们从语义表示和概率分布两个方面详细描述了一个显式的人脸属性。这组FACs通过属性分解的方式将图像建模为语义空间和概率空间中的面部属性信息的组合。不同的FACs可以更好地结合人脸先验信息,生成具有细粒度语义属性的人脸图像。大量的基准实验表明,我们的方法实现了优越的幻觉效果,并优于国家的最先进的非常低分辨率(LR)噪声的人脸图像超分辨率。

英文摘要:

Existing face super-resolution (SR) methods mainly assume the input image to be noise-free. Their performance degrades drastically when applied to real-world scenarios where the input image is always contaminated by noise. In this paper, we propose a Facial Attribute Capsules Network (FACN) to deal with the problem of high-scale super-resolution of noisy face image. Capsule is a group of neurons whose activity vector models different properties of the same entity. Inspired by the concept of capsule, we propose an integrated representation model of facial information, which named Facial Attribute Capsule (FAC). In the SR processing, we first generated a group of FACs from the input LR face, and then reconstructed the HR face from this group of FACs. Aiming to effectively improve the robustness of FAC to noise, we generate FAC in semantic, probabilistic and facial attributes manners by means of integrated learning strategy. Each FAC can be divided into two sub-capsules: Semantic Capsule (SC) and Probabilistic Capsule (PC). Them describe an explicit facial attribute in detail from two aspects of semantic representation and probability distribution. The group of FACs model an image as a combination of facial attribute information in the semantic space and probabilistic space by an attribute-disentangling way. The diverse FACs could better combine the face prior information to generate the face images with fine-grained semantic attributes. Extensive benchmark experiments show that our method achieves superior hallucination results and outperforms state-of-the-art for very low resolution (LR) noise face image super resolution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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