arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2404.04544cs.CVcs.AI

BeyondScene:利用预训练扩散模型实现更高分辨率的人物中心场景生成

BeyondScene: Higher-Resolution Human-Centric Scene Generation With Pretrained Diffusion

Seoul National University(首尔大学);INMC;IPAI

Gwanghyun Kim, Hayeon Kim, Hoigi Seo, Dong Un Kang, Se Young Chun

AI总结:

BeyondScene提出分阶段分层框架,通过实例感知分层放大、高频注入前向扩散和自适应联合扩散,利用预训练扩散模型生成超过8K的高分辨率人物中心场景,无需重新训练。

摘要:

对于现有的文本到图像扩散模型而言,生成具有细节和可控性的更高分辨率人物中心场景仍然是一项挑战。这一挑战源于有限的训练图像尺寸、文本编码器容量(有限的 token 数)以及生成涉及多个人物的复杂场景的固有困难。虽然当前方法仅尝试解决训练尺寸限制问题,但它们往往会产生带有严重伪影的人物中心场景。我们提出了 BeyondScene,这是一个克服先前局限性的新型框架,利用现有的预训练扩散模型生成精美的更高分辨率(超过 8K)人物中心场景,并具有出色的文本-图像对应性和自然度。BeyondScene 采用分阶段和分层的方法,首先生成一张详细的基图,重点处理多个人物实例创建中的关键元素以及超出扩散模型 token 限制的详细描述,然后通过我们新颖的实例感知分层放大过程,将基图无缝转换为更高分辨率的输出,该输出超过训练图像尺寸,并融合了感知文本和实例的细节,该过程由我们提出的高频注入前向扩散和自适应联合扩散组成。BeyondScene 在与详细文本描述的对应性和自然度方面超越了现有方法,为在预训练扩散模型能力范围之外进行更高分辨率人物中心场景创建的高级应用铺平了道路,而无需昂贵的重新训练。项目页面:https://janeyeon.github.io/beyond-scene。

英文摘要:

Generating higher-resolution human-centric scenes with details and controls remains a challenge for existing text-to-image diffusion models. This challenge stems from limited training image size, text encoder capacity (limited tokens), and the inherent difficulty of generating complex scenes involving multiple humans. While current methods attempted to address training size limit only, they often yielded human-centric scenes with severe artifacts. We propose BeyondScene, a novel framework that overcomes prior limitations, generating exquisite higher-resolution (over 8K) human-centric scenes with exceptional text-image correspondence and naturalness using existing pretrained diffusion models. BeyondScene employs a staged and hierarchical approach to initially generate a detailed base image focusing on crucial elements in instance creation for multiple humans and detailed descriptions beyond token limit of diffusion model, and then to seamlessly convert the base image to a higher-resolution output, exceeding training image size and incorporating details aware of text and instances via our novel instance-aware hierarchical enlargement process that consists of our proposed high-frequency injected forward diffusion and adaptive joint diffusion. BeyondScene surpasses existing methods in terms of correspondence with detailed text descriptions and naturalness, paving the way for advanced applications in higher-resolution human-centric scene creation beyond the capacity of pretrained diffusion models without costly retraining. Project page: https://janeyeon.github.io/beyond-scene.

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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