🔥 Lens: Rethinking Training Efficiency for Foundational Text-to-Image Models

💡 The paper introduces Lens, a compact 3.8 billion parameter text-to-image model that achieves superior performance with reduced training compute. The problem addressed is the high computational cost of training large text-to-image models, which can be a significant barrier to their adoption. To address this, the authors propose two key strategies. First, they maximize data information density per training batch by using a dataset of 800 million densely captioned image-text pairs, where each caption contains approximately 109 words on average, providing richer semantic supervision than conventional short captions. They also construct each batch from images with multiple resolutions and diverse aspect ratios, enlarging the effective visual coverage of each optimization step.

Second, they improve convergence speed through careful architectural choices, including adopting a semantic VAE that provides better latent representations and employing a strong language encoder that accelerates optimization while enabling multilingual generalization from English-only training data. The authors also apply reinforcement learning with taxonomy-driven prompts and structured reward rubrics to suppress artifacts and improve visual quality, and use a reasoner module with training-free system prompt search to better align user requests with the model.

The results show that Lens achieves performance competitive with, and in several cases surpassing, state-of-the-art models with more than 6 billion parameters, while requiring significantly less training compute. For example, Lens requires only about 19.3% of the training compute used by Z-Image. The model generalizes to arbitrary aspect ratios and resolutions up to 1440^2, and supports prompts in several commonly used languages. Thanks to its compact size, Lens generates a 1024^2 image in 3.15 seconds on a single NVIDIA H100 GPU, while its distilled turbo version performs 4-step generation in 0.84 seconds. Overall, the paper demonstrates that Lens is a highly efficient and effective text-to-image model that can be trained with significantly less computational resources than existing models.

📅 Published on May 20

🔗 Links:
• GitHub: https://github.com/huggingface
• arXiv: https://arxiv.org/abs/2605.21573
• PDF: https://arxiv.org/pdf/2605.21573
• Project Page: https://huggingface.co/microsoft/Lens

🤖 Models citing this paper:
• https://huggingface.co/microsoft/Lens-Turbo
• https://huggingface.co/microsoft/Lens
• https://huggingface.co/microsoft/Lens-Base

🚀 Spaces citing this paper:
• https://huggingface.co/spaces/multimodalart/lens

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📢 By: https://xn--r1a.website/PaperNexus

#TextToImageModels #EfficientTrainingMethods #CompactNeuralNetworks #ImageTextPairs #FoundationalModeling