diffusion models (DMs) achievestate-of-the-artsynthesis results on image data and beyond. Additionally, their formulation allows for a guiding mechanism to control the image generation process without retraining. However, since these models typically operate directly in pixel space, optimization...
Hence, our compression model preserves details of x better (see Tab. 8). The full objective and training details can be found in the supplement. 3.2. Latent Diffusion Models 扩散模型 [82] 是一种概率模型,旨在通过逐渐对正态分布的变量进行去噪来学习数据分布 p(x),这相当于学习长度为 T 的固定...
通过引入交叉注意力用于LDM的条件建模,为各种模态的条件依赖打开了一条道路。对于文生图的图像建模,论文在LAION-400M数据集上,训练了1.45B参数量的KL正则化的LDM模型。采用bert-tokenizer将文本信息token化,用transfomer实现τθτθ,将文本信息最终编码输入到UNet网络中。这种领域特定的语言表示与视觉合成产生了...
By introducing cross-attention layers into the model architecture, we turn diffusion models into powerful and flexible generators for general conditioning inputs such as text or bounding boxes and high-resolution synthesis becomes possible in a convolutional manner. Our latent diffusion models (LDMs) ac...
U-ViT就是把diffusion model中U-Net的卷积block替换为transformer。 Semantic direction manipulation in u-space 令人震惊的是,虽然u-space是文章很重要的概念,也是作者一直在强调的贡献,但是我没有找到u-space任何定义。在Appendix. 6中,作者提到 we choose to perform semantic editing at the beginning of U-ViT...
Text Encoder:Latent Diffusion 采用一个随机初始化的 Transformer (这个 Transformer 就是 ChatGPT 用的那个 Transformer,稍后我们会详细介绍)来编码 text,而 Stable Diffusion 采用一个预训练好的 Clip text encoder 来编码 text,预训练的 text model 往往要优于从零开始训练的模型。
在获取到stable-diffusion-v1-*-original权重后, 通过软连接的形式链接它。 mkdir -p models/ldm/stable-diffusion-v1/ ln -s <path/to/model.ckpt> models/ldm/stable-diffusion-v1/model.ckpt 接着使用如下指令进行采样: python scripts/txt2img.py --prompt "a photograph of an astronaut riding a hor...
diffusion model framework, and leveragethis to design a novel conditional parameterization for diffusion models. Weshow that the resulting model can improve upon the unconditional diffusionmodel in terms of sampling efficiency while also equipping diffusion modelswith the low-dimensional VAE inferred latent...
For the transmission problems about sewage disposal model ofsubsurface flow wetland,the analytical solution is obtained by using the Laplace transform technique for non-steady SSFW model,and the diffusion characteristics for some parameters used in the model are analyzed. ...