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arXiv 2203.09333cs.CV
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用于多功能图像合成的调制对比度

Modulated Contrast for Versatile Image Synthesis

Nanyang Technological University(南洋理工大学)

Fangneng Zhan, Jiahui Zhang, Yingchen Yu, Rongliang Wu, Shijian Lu

摘要:

感知图像之间的相似性一直是各种视觉生成任务的一个长期存在的基本问题。主流方法通过计算逐点绝对偏差来测量图像间距离,这往往会估计实例分布的中值,并导致生成的图像中的模糊和伪影。本文介绍了MoNCE,一个多功能的度量,引入图像对比度学习校准度量的感知多方面的图像间的距离。与vanilla contrast不加区别地将负样本从锚点推离而不管它们的相似性不同,我们提出根据负样本与锚点的相似性自适应地重新加权负样本的推离力,这有助于从信息丰富的负样本中进行对比学习。由于图像距离测量涉及多个块级对比目标,我们在MoNCE中引入最优传输,以跨多个对比目标协作地调制负样本的推力。多个图像翻译任务的大量实验表明,所提出的MoNCE的性能大大优于各种流行的指标。该代码可在https://github.com/fnzhan/MoNCE上获得。

英文摘要:

Perceiving the similarity between images has been a long-standing and fundamental problem underlying various visual generation tasks. Predominant approaches measure the inter-image distance by computing pointwise absolute deviations, which tends to estimate the median of instance distributions and leads to blurs and artifacts in the generated images. This paper presents MoNCE, a versatile metric that introduces image contrast to learn a calibrated metric for the perception of multifaceted inter-image distances. Unlike vanilla contrast which indiscriminately pushes negative samples from the anchor regardless of their similarity, we propose to re-weight the pushing force of negative samples adaptively according to their similarity to the anchor, which facilitates the contrastive learning from informative negative samples. Since multiple patch-level contrastive objectives are involved in image distance measurement, we introduce optimal transport in MoNCE to modulate the pushing force of negative samples collaboratively across multiple contrastive objectives. Extensive experiments over multiple image translation tasks show that the proposed MoNCE outperforms various prevailing metrics substantially. The code is available at https://github.com/fnzhan/MoNCE.

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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