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How do I use an existing AI model to classify pornographic images? [closed]
Closed as too generic by Alexei on Jul 27, 2023 at 08:14
This post contains multiple questions or has many possible indistinguishable correct answers or requires extraordinary long answers.
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In the last few months, AI has advanced considerably, notably in the area of generating images. We now have powerful models like DALL-E, Stable Diffusion, etc. These are quite competent at generating an image based on a text prompt.
Can any existing models be used as a simple binary classifier of porn/not porn for images? How do I do this?
I'm asking for a high level description of how to set up such a classifier. I can read the relevant model/API docs myself, but I would like some pointers and a "big picture" explanation.
- An okay solution would have 65% precision and recall rate.
- A good solution should have 95% precision and recall rate.
- A great solution should have 99% precision and recall rate.
Note that these are rough guidelines, I'm not going to actually benchmark your solution and split hairs over exact accuracy. I'm just trying to explain what sort of ballpark performance I expect. I want to use this to filter out and remove porn from various content streams, so I need something that has a chance of working reasonably well, not just a proof of concept.
The definition of porn is not critical. So long as things that are obviously porn (full nudity) get a positive, and things that are obviously not (cat eating watermelon) get a negative, I'm not too worried about borderline cases (sculptures, suggestive imagery, pareidolia, etc I don't really care which way it's classified).
Ideally I would like to avoid developing full image recognition models of my own, since it's a lot of work for an individual. So no building large training sets, training models, tuning them, etc. I am hoping the existing state of the art models are already trained enough to distinguish porn from not porn.
I am willing to develop a small model if necessary - a sort of minimal layer boosting off of a "real" image model, that merely classifies the output of that model into my binary classes rather than learning to actually interpret images. I'm thinking here something very simple, like a basic decision tree, with 100s or even 10s of training data (generated manually). The real work of interpreting images should still be done by an existing off the shelf model.
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