[non_sequitur]

Probably not that hard to build a fecal recognition model, it's what comes after that's more difficult. "It's like Uber for scooping"

[dinedal]

SF already has this: http://mobile311.sfgov.org/reports?utf8=%E2%9C%93&q=poop

Just report the poop on 311 and they go clean it up. Yes it works.

[nitrogen]

That looks like it only has a search interface. How do you add a new report?

[dinedal]

The link to download the 311 reporting app for Android and iOS are on the right side of page when viewed on a desktop, not sure how it looks on mobile however the link should still be there.