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There is a cat that wanders around my neighbourhood. I wanted to build something that would notify me whenever it came to my backyard. The post describes what I did
Curious: Why? Do you want to feed it? Shoo it away? Get to know it? Avoid letting your cat out when it's around?
Good karma mainly
This comment might be confusing - I misread what the question was

I feed the cat for good karma

The picture stuff was to get a notification to tell when it was coming to eat

I would do this to make friends. There's a really friendly cat I see about once a week. I'm sure he's around more.
Written in a non-emotional, detached, and non-sensational style. I was even wondering if it was written by chatGPT
Our culture must have fallen quite far if we can't expect that from human writers anymore!
Nicely done, I like the straightforward dedicated nature of the project. Even years after the Raspberry Pi has been out I still enjoy reading how people use it. I suppose the cat factor does play a role in it though.
Reminds of this post of someone who added a camera to the little cat door because the cat kept bringing 'gifts' (mice) indoors. He used ML to detect if the cat brought a gift. In that case he temporarily locked it.
Not sure if it is the same project, but I remember something like that from a long time ago. The cat would walk through a backlit tunnel and project a black and white silhouette of its profile onto a low res camera.

They used a very simple neural network to do the detection. Several example pictures were included in the write up, showing the cat normally, one where it was holding a mouse, as well as a profile of a possum (IIRC).

Replicating those results has been on my to-do list for over a decade.

I am trying to build something similar with my raspberry pi - but with a temperature detector sensor. Btw well written, just how a tech article should be, no fluff and to the point!