Image recognition - Find swimming pools in google earth

I need to create a program that will crawl google earth or google maps, and will find locations of swimming pools. Once a location is found, I need to get the address of the pool location from google maps. You can use any coding language you choose, although I personally prefer php. The program doesn't need to have 100% accuracy since the pool shapes and colors can differ greatly, but I expect a good accuracy and not many false positives. If high accuracy is hard to reach, we may add a simple "mechanical torque" style page where the pictures that are found will be shown and the user will be asked "Is this a swimming pool?" Yes/No But the base must be a good image recognition program that will actually do the job. Attached are examples of pool photos from google earth.