2022 | Robin Rombach, Andreas Blattmann, Dominik Lorenz, Patrick Esser, Björn Ommer
Latent Diffusion Models (LDMs) are a novel approach to high-resolution image synthesis that significantly reduces computational requirements while maintaining high-quality results. By operating in the latent space of powerful pretrained autoencoders, LDMs achieve a balance between complexity reduction and detail preservation, leading to improved visual fidelity. The models incorporate cross-attention layers, enabling them to handle various conditioning inputs such as text or bounding boxes, and allow for high-resolution synthesis through convolutional methods. LDMs outperform existing methods in image inpainting, class-conditional image synthesis, and super-resolution, while reducing computational demands compared to pixel-based diffusion models. The approach involves training an autoencoder to create a perceptually equivalent, lower-dimensional latent space, which is then used for training diffusion models. This method allows for efficient image generation and supports a wide range of tasks, including text-to-image synthesis and layout-to-image generation. The models are evaluated on various datasets and demonstrate competitive performance, with significant improvements in efficiency and quality. The study also highlights the potential societal impact of generative models, emphasizing the need for ethical considerations in their application.Latent Diffusion Models (LDMs) are a novel approach to high-resolution image synthesis that significantly reduces computational requirements while maintaining high-quality results. By operating in the latent space of powerful pretrained autoencoders, LDMs achieve a balance between complexity reduction and detail preservation, leading to improved visual fidelity. The models incorporate cross-attention layers, enabling them to handle various conditioning inputs such as text or bounding boxes, and allow for high-resolution synthesis through convolutional methods. LDMs outperform existing methods in image inpainting, class-conditional image synthesis, and super-resolution, while reducing computational demands compared to pixel-based diffusion models. The approach involves training an autoencoder to create a perceptually equivalent, lower-dimensional latent space, which is then used for training diffusion models. This method allows for efficient image generation and supports a wide range of tasks, including text-to-image synthesis and layout-to-image generation. The models are evaluated on various datasets and demonstrate competitive performance, with significant improvements in efficiency and quality. The study also highlights the potential societal impact of generative models, emphasizing the need for ethical considerations in their application.