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No I'm talking about the image segmentation feature: https://simonwillison.net/2025/Apr/18/gemini-image-segmentation/ https://simonwillison.net/2025/Apr/18/gemi
by simonw 10mo ago
No I'm talking about the image segmentation feature: https://simonwillison.net/2025/Apr/18/gemini-image-segmentation/ https://simonwillison.net/2025/Apr/18/gemini-image-segmentat...
But the bounding box stuff might work well enough in Gemini 3 to handle this case as well.
- lysecret 10mo agoHmm so that post also links back to segmentation done by structured outputs? (Though here not even enforcing the structure) https://ai.google.dev/gemini-api/docs/image-understanding#segmentation https://ai.google.dev/gemini-api/docs/image-understanding#se...
- simonw 10mo agoIt's not supported by Gemini 3: https://ai.google.dev/gemini-api/docs/gemini-3#migrating_from_gemini_25 https://ai.google.dev/gemini-api/docs/gemini-3#migrating_fro... > Image segmentation: Image segmentation capabilities (returning pixel-level masks for objects) are not supported in Gemini 3 Pro or Gemini 3 Flash. For workloads requiring native image segmentation, we recommend continuing to utilize Gemini 2.5 Flash with thinking turned off or Gemini Robotics-ER 1.5.