


AltDiffusion-m18, a versatile tool for generating multilingual texts and images
Currently, the selection of non-English text and image generation models is limited, and users often have to translate the prompt into English before entering the model. This will not only cause additional operational burden, but also language and cultural errors in the translation process will affect the accuracy of the generated images.
Zhiyuan Research Institute’s FlagAI team pioneered an efficient training method, using a multi-language pre-training model combined with Stable Diffusion to train a multi-language text and image generation model - AltDiffusion-m18, supporting 18 types Language text-image generation.
Including Chinese, English, Japanese, Thai, Korean, Hindi, Ukrainian, Arabic, Turkish, Vietnamese, Polish, Dutch, Portuguese, Italian, Spanish, German, French, Russian.
Huggingface: https://huggingface.co/BAAI/AltDiffusion-m18
GitHub: https://github.com/FlagAI-Open/FlagAI/blob/master/examples/AltDiffusion -m18
AltDiffusion-m18 achieved Stable Diffusion 95~99% effect in the objective evaluation of FID, IS, CLIP score in English, reached the optimal level in Chinese and Japanese, and filled in the remaining 15 categories. The gap in the language text and picture generation model has greatly satisfied the industry's strong demand for multi-language text and picture generation. Special thanks go to the Stable Diffusion Research Team for providing advice on this work.
In addition, AltDiffusion-m18 related innovative technology report "AltCLIP: Altering the Language Encoder in CLIP for Extended Language Capabilities" has been accepted by Findings of ACL 2023.
Technical Highlights
1 New AltCLIP, efficient and low-cost construction of multi-language T2I model
AltDiffusion released last year -m9, based on Stable Diffusion v1.4, the Zhiyuan team innovatively replaced the language tower with the multi-language tower AltCLIP, and used multi-language data in nine languages for fine-tuning, extending the original Stable Diffusion that only supports English to support 9 different languages.
AltCLIP: https://github.com/FlagAI-Open/FlagAI/tree/master/examples/AltCLIP-m18
And AltDiffusion-m18 is based on Stable Diffusion v2.1 training. The new language tower of Stable Diffusion v2.1 is the inverted second layer of OpenCLIP. Therefore, the new AltCLIP uses the inverted second layer of OpenCLIP as the distillation target to retrain, and based on m9, it will only use the CrossAttention layer K and V matrices in Unet. Fine-tuning is expanded into a two-stage training method, as shown in the figure below:
- First stage: Earlier during the experiment of m9, it was discovered that fine-tuning the K and V matrices The main thing to learn is the conceptual alignment of text and pictures, so the first stage of m18 training continues to use the data of 18 languages to fine-tune the K and V matrices. In addition, experiments have proven that reducing the resolution of an image from 512*512 to 256*256 does not lose the semantic information of the image. Therefore, in the first stage of learning text-image concept alignment, the resolution of 256*256 is used for training, which speeds up the training.
- The second stage: In order to further improve the quality of the generated images, use the resolution of 512*512 to train the full parameters of Unet in the data of 18 languages. In addition, 10% of the text is discarded for unconditional training to serve classifier-free guidance inference.
- In addition, a classifier-free guided training technique is adopted to further improve the generation quality.
The latest evaluation results show that AltCLIP-m18 surpasses CLIP and reaches the optimal level in Chinese and English zero-shot (zero sample) retrieval tasks⬇️
On multi-language image classification benchmarks, AltCLIP-m9 (early version, supports 9 languages) and AltCLIP-m18 reach the optimal level ⬇️
Similarly, thanks to AltCLIP With the innovative idea of changing towers, AltDiffusion-m18 can also be seamlessly connected to all Stable Diffusion models and ecological tools built on the original CLIP. All tools that support Stable Diffusion such as Stable Diffusion WebUI, DreamBooth, etc. can be applied to AltDiffusion-m18. Painless to get started and great playability!
2 Multi-language generation effects are aligned, with superior performance and accurate details
With the blessing of the new AltCLIP, AltDiffusion-m18 has achieved 95~99% of the original Stable Diffusion effect in the English FID, IS, CLIP score evaluation, and has achieved the most advanced performance in 17 languages including Chinese and Japanese. The performance of AltDiffusion-m18 is shown in the following table:
The above is the detailed content of AltDiffusion-m18, a versatile tool for generating multilingual texts and images. For more information, please follow other related articles on the PHP Chinese website!

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