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arXiv 2207.03332cs.CVeess.IV
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使用堆叠条件变分自编码器和条件生成对抗网络的文本到图像合成

Text to Image Synthesis using Stacked Conditional Variational Autoencoders and Conditional Generative Adversarial Networks

Institute of Digital Technologies, Loughborough University(拉夫堡大学数字技术研究所)

Haileleol Tibebu, Aadil Malik, Varuna De Silva

摘要:

从文本描述合成真实感图像是计算机视觉的一个主要挑战。当前的文本到图像合成方法不能产生表示文本描述符的高分辨率图像。大多数现有的研究依赖于生成对抗网络(GANs)或变分自动编码器(VAE)。GANs有能力产生更清晰的图像,但缺乏输出的多样性,而VAE擅长产生各种各样的输出,但生成的图像往往是模糊的。考虑到GANs和VAE的相对优势,我们提出了一种新的堆叠条件VAE(CVAE)和条件GAN(CGAN)网络架构,用于合成以文本描述为条件的图像。本研究使用条件VAE作为初始生成器来生成文本描述符的高级草图。第一阶段的高级草图输出和文本描述符用作条件GAN网络的输入。第二级GAN产生256 × 256高分辨率图像。所提出的架构受益于条件增强和条件GAN网络上的残差块来实现结果。使用CUB和Oxford-102数据集进行了多个实验,并将所提出的方法的结果与StackGAN等最先进的技术进行了比较。实验结果表明,该方法在文本描述的条件下生成高分辨率图像,并在使用两个数据集的Inception和Frechet Inception Score的基础上产生有竞争力的结果

英文摘要:

Synthesizing a realistic image from textual description is a major challenge in computer vision. Current text to image synthesis approaches falls short of producing a highresolution image that represent a text descriptor. Most existing studies rely either on Generative Adversarial Networks (GANs) or Variational Auto Encoders (VAEs). GANs has the capability to produce sharper images but lacks the diversity of outputs, whereas VAEs are good at producing a diverse range of outputs, but the images generated are often blurred. Taking into account the relative advantages of both GANs and VAEs, we proposed a new stacked Conditional VAE (CVAE) and Conditional GAN (CGAN) network architecture for synthesizing images conditioned on a text description. This study uses Conditional VAEs as an initial generator to produce a high-level sketch of the text descriptor. This high-level sketch output from first stage and a text descriptor is used as an input to the conditional GAN network. The second stage GAN produces a 256x256 high resolution image. The proposed architecture benefits from a conditioning augmentation and a residual block on the Conditional GAN network to achieve the results. Multiple experiments were conducted using CUB and Oxford-102 dataset and the result of the proposed approach is compared against state-ofthe-art techniques such as StackGAN. The experiments illustrate that the proposed method generates a high-resolution image conditioned on text descriptions and yield competitive results based on Inception and Frechet Inception Score using both datasets

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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