[ifmw]

Nice product but would you mind sharing the reasons why you abandoned it?

Bing image search used to have a nearly identical feature but the flow was different. You would start with a keyword search for images, and could refine your search by drawing on a pixel grid in the colours of your choice. I personally got a kick out of drawing things like drawing a yellow sunset setting in the left over a blue ocean and having image search results contain that.

Sadly bing appears to have removed that very very hidden feature. Perhaps for technical reasons similar to yours (if any?)?

[dvt]

There was no real practical application. I don't have the money to run a huge server farm serving hundreds of thousands of pictures to actually make it viable.

It was mostly an experiment of me learning how to work with OpenCV. I had no idea Bing had something similar. That's very cool. At least it shows I'm not completely bonkers.