我们提出了第一个统一的框架Unicolor,以支持多种方式的着色,包括无条件和条件性的框架,例如中风,示例,文本,甚至是它们的混合。我们没有为每种类型的条件学习单独的模型,而是引入了一个两阶段的着色框架,以将各种条件纳入单个模型。在第一阶段,多模式条件将转换为提示点的共同表示。特别是,我们提出了一种基于剪辑的新方法,将文本转换为提示点。在第二阶段,我们提出了一个基于变压器的网络,该网络由Chroma-vqgan和Hybrid-Transformer组成,以生成以提示点为条件的多样化和高质量的着色结果。定性和定量比较都表明,我们的方法在每种控制方式中都优于最先进的方法,并进一步实现了以前不可行的多模式着色。此外,我们设计了一个交互式界面,显示了我们统一框架在实际用法中的有效性,包括自动着色,混合控制着色,局部再现和迭代色彩编辑。我们的代码和型号可在https://luckyhzt.github.io/unicolor上找到。
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随着信息中的各种方式存在于现实世界中的各种方式,多式联信息之间的有效互动和融合在计算机视觉和深度学习研究中的多模式数据的创造和感知中起着关键作用。通过卓越的功率,在多式联运信息中建模互动,多式联运图像合成和编辑近年来已成为一个热门研究主题。与传统的视觉指导不同,提供明确的线索,多式联路指南在图像合成和编辑方面提供直观和灵活的手段。另一方面,该领域也面临着具有固有的模态差距的特征的几个挑战,高分辨率图像的合成,忠实的评估度量等。在本调查中,我们全面地阐述了最近多式联运图像综合的进展根据数据模型和模型架构编辑和制定分类。我们从图像合成和编辑中的不同类型的引导方式开始介绍。然后,我们描述了多模式图像综合和编辑方法,其具有详细的框架,包括生成的对抗网络(GAN),GaN反转,变压器和其他方法,例如NERF和扩散模型。其次是在多模式图像合成和编辑中广泛采用的基准数据集和相应的评估度量的综合描述,以及分析各个优点和限制的不同合成方法的详细比较。最后,我们为目前的研究挑战和未来的研究方向提供了深入了解。与本调查相关的项目可在HTTPS://github.com/fnzhan/mise上获得
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从手绘中生成图像是内容创建的至关重要和基本任务。翻译很困难,因为存在无限的可能性,并且不同的用户通常会期望不同的结果。因此,我们提出了一个统一的框架,该框架支持基于扩散模型的草图和笔触对图像合成的三维控制。用户不仅可以确定输入笔画和草图的忠诚程度,而且还可以确定现实程度,因为用户输入通常与真实图像不一致。定性和定量实验表明,我们的框架实现了最新的性能,同时提供了具有控制形状,颜色和现实主义的自定义图像的灵活性。此外,我们的方法释放了应用程序,例如在真实图像上编辑,部分草图和笔触的生成以及多域多模式合成。
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Text-guided 3D object generation aims to generate 3D objects described by user-defined captions, which paves a flexible way to visualize what we imagined. Although some works have been devoted to solving this challenging task, these works either utilize some explicit 3D representations (e.g., mesh), which lack texture and require post-processing for rendering photo-realistic views; or require individual time-consuming optimization for every single case. Here, we make the first attempt to achieve generic text-guided cross-category 3D object generation via a new 3D-TOGO model, which integrates a text-to-views generation module and a views-to-3D generation module. The text-to-views generation module is designed to generate different views of the target 3D object given an input caption. prior-guidance, caption-guidance and view contrastive learning are proposed for achieving better view-consistency and caption similarity. Meanwhile, a pixelNeRF model is adopted for the views-to-3D generation module to obtain the implicit 3D neural representation from the previously-generated views. Our 3D-TOGO model generates 3D objects in the form of the neural radiance field with good texture and requires no time-cost optimization for every single caption. Besides, 3D-TOGO can control the category, color and shape of generated 3D objects with the input caption. Extensive experiments on the largest 3D object dataset (i.e., ABO) are conducted to verify that 3D-TOGO can better generate high-quality 3D objects according to the input captions across 98 different categories, in terms of PSNR, SSIM, LPIPS and CLIP-score, compared with text-NeRF and Dreamfields.
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条件图像合成旨在根据文本描述,参考图像和图像块的形式创建图像,以保存的,以及它们的组合。在本文中,我们提出了一个新的两级架构M6-UFC,统一了任何数量的多模态控件。在M6-UFC中,各种控制信号和合成图像都均匀地表示为由变压器处理的离散令牌序列。与现有的两级自回归方式不同,如Dall-E和VQGAN,M6-UFC在第二阶段采用非自动发作生成(NAR),以增强合成图像的整体一致性,以支持保留指定的图像块,以及提高合成速度。此外,我们设计了一种逐步算法,其迭代地改善了非自动产生的图像,其中包括用于评估符合控制的符合和评估合成图像的保真度的两个估计器的帮助。在新收集的大型服装数据集M2C时装和面部数据集多模态Celeba-HQ上进行了广泛的实验验证了M6-UFC可以合成符合灵活的多模态控制的高保真图像。
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近年来,着色吸引了越来越多的兴趣。经典的基于参考的方法通常依靠外部颜色图像来获得合理的结果。检索此类示例不可避免地需要大型图像数据库或在线搜索引擎。最近的基于深度学习的方法可以自动以低成本为图像着色。但是,总是伴随着不满意的文物和不连贯的颜色。在这项工作中,我们提出了GCP颜色化,以利用预审前的生成对抗网络(GAN)封装的丰富和多样化的颜色先验进行自动着色。具体而言,我们首先通过GAN编码器“检索”匹配的功能(类似于示例),然后将这些功能与功能调制量合并到着色过程中。得益于强大的生成颜色先验(GCP)和精致的设计,我们的GCP颜色可以通过单个前向传球产生生动的颜色。此外,通过修改GAN潜在代码获得多样化的结果非常方便。 GCP颜色还继承了可解释的gan的功能,并可以通过穿过甘恩潜在空间来实现可控制和平滑的过渡。广泛的实验和用户研究表明,GCP颜色比以前的作品具有出色的性能。代码可在https://github.com/tothebeginning/gcp-colorization上找到。
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Astounding results from Transformer models on natural language tasks have intrigued the vision community to study their application to computer vision problems. Among their salient benefits, Transformers enable modeling long dependencies between input sequence elements and support parallel processing of sequence as compared to recurrent networks e.g., Long short-term memory (LSTM). Different from convolutional networks, Transformers require minimal inductive biases for their design and are naturally suited as set-functions. Furthermore, the straightforward design of Transformers allows processing multiple modalities (e.g., images, videos, text and speech) using similar processing blocks and demonstrates excellent scalability to very large capacity networks and huge datasets. These strengths have led to exciting progress on a number of vision tasks using Transformer networks. This survey aims to provide a comprehensive overview of the Transformer models in the computer vision discipline. We start with an introduction to fundamental concepts behind the success of Transformers i.e., self-attention, large-scale pre-training, and bidirectional feature encoding. We then cover extensive applications of transformers in vision including popular recognition tasks (e.g., image classification, object detection, action recognition, and segmentation), generative modeling, multi-modal tasks (e.g., visual-question answering, visual reasoning, and visual grounding), video processing (e.g., activity recognition, video forecasting), low-level vision (e.g., image super-resolution, image enhancement, and colorization) and 3D analysis (e.g., point cloud classification and segmentation). We compare the respective advantages and limitations of popular techniques both in terms of architectural design and their experimental value. Finally, we provide an analysis on open research directions and possible future works. We hope this effort will ignite further interest in the community to solve current challenges towards the application of transformer models in computer vision.
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基于示例的基于彩色方法依赖于参考图像来为目标灰度图像提供合理的颜色。基于示例的颜色的关键和难度是在这两个图像之间建立准确的对应关系。以前的方法已经尝试构建这种对应关系,而是面临两个障碍。首先,使用用于计算对应的亮度通道是不准确的。其次,它们构建的密集信件引入了错误的匹配结果并提高了计算负担。为了解决这两个问题,我们提出了语义 - 稀疏的彩色网络(SSCN)以粗细的方式将全局图像样式和详细的语义相关颜色传输到灰度图像。我们的网络可以完全平衡全局和本地颜色,同时减轻了暧昧的匹配问题。实验表明,我们的方法优于定量和定性评估的现有方法,实现了最先进的性能。
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Automatic image colorization is a particularly challenging problem. Due to the high illness of the problem and multi-modal uncertainty, directly training a deep neural network usually leads to incorrect semantic colors and low color richness. Existing transformer-based methods can deliver better results but highly depend on hand-crafted dataset-level empirical distribution priors. In this work, we propose DDColor, a new end-to-end method with dual decoders, for image colorization. More specifically, we design a multi-scale image decoder and a transformer-based color decoder. The former manages to restore the spatial resolution of the image, while the latter establishes the correlation between semantic representations and color queries via cross-attention. The two decoders incorporate to learn semantic-aware color embedding by leveraging the multi-scale visual features. With the help of these two decoders, our method succeeds in producing semantically consistent and visually plausible colorization results without any additional priors. In addition, a simple but effective colorfulness loss is introduced to further improve the color richness of generated results. Our extensive experiments demonstrate that the proposed DDColor achieves significantly superior performance to existing state-of-the-art works both quantitatively and qualitatively. Codes will be made publicly available.
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跨模式时尚图像合成已成为一代域中最有前途的方向之一,因为巨大的未开发的潜力融合了多种方式和广泛的时尚图像应用。为了促进准确的生成,跨模式合成方法通常依赖于对比的语言图像预训练(剪辑)来对齐文本和服装信息。在这项工作中,我们认为,简单地对齐纹理和服装信息不足以捕获视觉信息的语义,因此提出了maskClip。 MaskClip将服装分解为语义部分,以确保视觉和文本信息之间的细粒度和语义准确对齐。在MaskClip上,我们建议Armani,这是一位统一的跨模式时装设计师,具有零件级的服装文本对齐。 Armani在第一阶段将图像分散成统一令牌,并使用变压器在第二阶段的控制信号的标记中使用变压器为真实图像的图像令牌进行建模。与同样依赖两阶段范式的先前方法相反,Armani将文本令牌引入了代码簿中,使该模型可以利用细粒语义信息来生成更真实的图像。此外,通过引入跨模式变压器,Armani具有通用性,可以从各种控制信号(例如纯文本,草图图像和部分图像)中完成图像合成。在我们新收集的跨模式时尚数据集上进行的广泛实验表明,Armani在不同的合成任务中生成了光真实的图像,并且优于现有的最先进的跨模式图像综合方法。 github.com/harvey594/armani。
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扩散模型(DMS)显示出高质量图像合成的巨大潜力。但是,当涉及到具有复杂场景的图像时,如何正确描述图像全局结构和对象细节仍然是一项具有挑战性的任务。在本文中,我们提出了弗里多(Frido),这是一种特征金字塔扩散模型,该模型执行了图像合成的多尺度粗到1个降解过程。我们的模型将输入图像分解为依赖比例的矢量量化特征,然后是用于产生图像输出的粗到细门。在上述多尺度表示阶段,可以进一步利用文本,场景图或图像布局等其他输入条件。因此,还可以将弗里多应用于条件或跨模式图像合成。我们对各种无条件和有条件的图像生成任务进行了广泛的实验,从文本到图像综合,布局到图像,场景环形图像到标签形象。更具体地说,我们在五个基准测试中获得了最先进的FID分数,即可可和开阔图像的布局到图像,可可和视觉基因组的场景环形图像以及可可的标签对图像图像。 。代码可在https://github.com/davidhalladay/frido上找到。
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Object compositing based on 2D images is a challenging problem since it typically involves multiple processing stages such as color harmonization, geometry correction and shadow generation to generate realistic results. Furthermore, annotating training data pairs for compositing requires substantial manual effort from professionals, and is hardly scalable. Thus, with the recent advances in generative models, in this work, we propose a self-supervised framework for object compositing by leveraging the power of conditional diffusion models. Our framework can hollistically address the object compositing task in a unified model, transforming the viewpoint, geometry, color and shadow of the generated object while requiring no manual labeling. To preserve the input object's characteristics, we introduce a content adaptor that helps to maintain categorical semantics and object appearance. A data augmentation method is further adopted to improve the fidelity of the generator. Our method outperforms relevant baselines in both realism and faithfulness of the synthesized result images in a user study on various real-world images.
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尽管两阶段矢量量化(VQ)生成模型允许合成高保真性和高分辨率图像,但其量化操作员将图像中的相似贴片编码为相同的索引,从而为相似的相邻区域重复使用现有的解码器体系结构的相似相似区域的重复伪像。为了解决这个问题,我们建议将空间条件的归一化结合起来,以调节量化的向量,以便将空间变体信息插入嵌入式索引图中,从而鼓励解码器生成更真实的图像。此外,我们使用多通道量化来增加离散代码的重组能力,而无需增加模型和代码簿的成本。此外,为了在第二阶段生成离散令牌,我们采用掩盖的生成图像变压器(MaskGit)来学习压缩潜在空间中的基础先验分布,该分布比常规自动回归模型快得多。两个基准数据集的实验表明,我们提出的调制VQGAN能够大大提高重建的图像质量,并提供高保真图像的产生。
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我们提出了COGS,这是一种新颖的方法,用于图像的样式条件,素描驱动的合成。 COGS可以为给定的草图对象探索各种外观可能性,从而对输出的结构和外观进行了脱钩的控制。通过输入草图和基于变压器的草图和样式编码器的示例“样式”调理图像启用了对物体结构和外观的粗粒粒度控制,以生成离散的代码簿表示。我们将代码簿表示形式映射到度量空间中,从而在通过量化量化的GAN(VQGAN)解码器生成图像之前,可以对多个合成选项之间的选择和插值进行细粒度的控制和插值。我们的框架因此统一了搜索和综合任务,因为草图和样式对可以用于运行初始合成,该合成可以通过结合结合在搜索语料库中结合使用,以使图像更加与用户的意图更匹配。我们表明,我们的模型对新创建的Pseudosketches数据集的125个对象类培训,能够生产出多种语义内容和外观样式的范围。
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In this work, we propose TediGAN, a novel framework for multi-modal image generation and manipulation with textual descriptions. The proposed method consists of three components: StyleGAN inversion module, visual-linguistic similarity learning, and instance-level optimization. The inversion module maps real images to the latent space of a well-trained StyleGAN. The visual-linguistic similarity learns the text-image matching by mapping the image and text into a common embedding space. The instancelevel optimization is for identity preservation in manipulation. Our model can produce diverse and high-quality images with an unprecedented resolution at 1024 2 . Using a control mechanism based on style-mixing, our Tedi-GAN inherently supports image synthesis with multi-modal inputs, such as sketches or semantic labels, with or without instance guidance. To facilitate text-guided multimodal synthesis, we propose the Multi-Modal CelebA-HQ, a large-scale dataset consisting of real face images and corresponding semantic segmentation map, sketch, and textual descriptions. Extensive experiments on the introduced dataset demonstrate the superior performance of our proposed method. Code and data are available at https://github.com/weihaox/TediGAN.
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我们研究了联合视频和语言(VL)预培训,以实现跨模型学习和益处丰富的下游VL任务。现有的作品要么提取低质量的视频特征或学习有限的文本嵌入,但忽略了高分辨率视频和多样化的语义可以显着提高跨模型学习。在本文中,我们提出了一种新的高分辨率和多样化的视频 - 语言预训练模型(HD-VILA),用于许多可视任务。特别是,我们收集具有两个不同属性的大型数据集:1)第一个高分辨率数据集包括371.5k小时的720p视频,2)最多样化的数据集涵盖15个流行的YouTube类别。为了启用VL预培训,我们通过学习丰富的时空特征的混合变压器联合优化HD-VILA模型,以及多峰变压器,用于强制学习视频功能与多样化文本的交互。我们的预训练模式实现了新的最先进的导致10 VL了解任务和2个新颖的文本到视觉生成任务。例如,我们以零拍摄MSR-VTT文本到视频检索任务的相对增加38.5%R @ 1的相对增长,高分辨率数据集LSMDC为53.6%。学习的VL嵌入也有效地在文本到视觉操纵和超分辨率任务中产生视觉上令人愉悦和语义相关结果。
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In this work, we are dedicated to text-guided image generation and propose a novel framework, i.e., CLIP2GAN, by leveraging CLIP model and StyleGAN. The key idea of our CLIP2GAN is to bridge the output feature embedding space of CLIP and the input latent space of StyleGAN, which is realized by introducing a mapping network. In the training stage, we encode an image with CLIP and map the output feature to a latent code, which is further used to reconstruct the image. In this way, the mapping network is optimized in a self-supervised learning way. In the inference stage, since CLIP can embed both image and text into a shared feature embedding space, we replace CLIP image encoder in the training architecture with CLIP text encoder, while keeping the following mapping network as well as StyleGAN model. As a result, we can flexibly input a text description to generate an image. Moreover, by simply adding mapped text features of an attribute to a mapped CLIP image feature, we can effectively edit the attribute to the image. Extensive experiments demonstrate the superior performance of our proposed CLIP2GAN compared to previous methods.
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我们介绍了自回归文本到图像(Parti)模型的途径,该模型生成高保真的影像图像并支持涉及复杂组成和世界知识的内容丰富的合成。 Parti将文本对图像生成视为类似于机器翻译的序列到序列建模问题,图像令牌的序列是目标输出,而不是其他语言的文本令牌。这种策略自然可以利用大型语言模型的先前工作,通过扩展数据和模型尺寸,能力和性能的持续进展。我们的方法很简单:首先,Parti使用基于变压器的图像令牌VIT-VQGAN将图像编码为离散令牌的序列。其次,我们通过将编码器二次变压器模型缩放到20B参数来实现一致的质量改进,其新的最新零弹药FID得分为7.23,而MS-Coco的FIDED得分为3.22。我们对本地化叙述以及党的详细分析(P2),这是1600多个英语提示的新的整体基准,证明了Parti在各种类别和难度方面的有效性。我们还探索并突出了我们的模型的局限性,以定义和体现关注重点领域以进一步改进。有关高分辨率图像,请参见https://parti.research.google/。
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高质量的HDRI(高动态范围图像),通常是HDR Panoramas,是创建图形中3D场景的3D场景的最受欢迎的方法之一。考虑到捕获HDRI的困难,高度需要一种多功能和可控的生成模型,外行用户可以直观地控制生成过程。但是,现有的最新方法仍然难以合成复杂场景的高质量全景。在这项工作中,我们提出了一个零击文本驱动的框架Text2Light,以生成4K+分辨率HDRIS,而无需配对培训数据。给定一个自由形式的文本作为场景的描述,我们通过两个专用步骤合成相应的HDRI:1)在低动态范围(LDR)(LDR)和低分辨率的文本驱动全景生成,以及2)超分辨率逆音映射在分辨率和动态范围内扩大LDR Panorama。具体来说,为了获得零击文本驱动的全景生成,我们首先将双代码簿作为不同环境纹理的离散表示形式。然后,在预先训练的剪辑模型的驱动下,一个文本条件的全局采样器学会了根据输入文本从全局代码簿中采样整体语义。此外,一个结构感知的本地采样器学会了以整体语义为指导的LDR Panoramas逐个贴片。为了获得超分辨率的逆音映射,我们从LDR Panorama得出了360度成像的连续表示,作为一组固定在球体上的结构性潜在代码。这种连续表示可以使多功能模块同时提高分辨率和动态范围。广泛的实验证明了Text2light在产生高质量HDR全景方面具有卓越的能力。此外,我们还展示了我们在现实渲染和沉浸式VR中工作的可行性。
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We present Muse, a text-to-image Transformer model that achieves state-of-the-art image generation performance while being significantly more efficient than diffusion or autoregressive models. Muse is trained on a masked modeling task in discrete token space: given the text embedding extracted from a pre-trained large language model (LLM), Muse is trained to predict randomly masked image tokens. Compared to pixel-space diffusion models, such as Imagen and DALL-E 2, Muse is significantly more efficient due to the use of discrete tokens and requiring fewer sampling iterations; compared to autoregressive models, such as Parti, Muse is more efficient due to the use of parallel decoding. The use of a pre-trained LLM enables fine-grained language understanding, translating to high-fidelity image generation and the understanding of visual concepts such as objects, their spatial relationships, pose, cardinality etc. Our 900M parameter model achieves a new SOTA on CC3M, with an FID score of 6.06. The Muse 3B parameter model achieves an FID of 7.88 on zero-shot COCO evaluation, along with a CLIP score of 0.32. Muse also directly enables a number of image editing applications without the need to fine-tune or invert the model: inpainting, outpainting, and mask-free editing. More results are available at https://muse-model.github.io
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