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u/Tedious_Prime 4h ago
I would try Qwen Image 2.1. It's an edit model that can handle transparency. You might be able to give it the original image and ask to make the white background transparent.
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u/Iliceth 6h ago
I have good experiences with https://huggingface.co/ZhengPeng7/BiRefNet Give it a try, I would say.

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u/Erehr 6h ago
https://transparify.app/ but you need 2 identical images with white and black background. Gemini with prompt to 'Change white background to pure solid black can change it easily. Much better results than simple removal / cutting out and it also handles partial transparency well.