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Recognizing a tennis court on a satellite image


To get familiar with OpenCV and image analysis in general, I decided to do a small pet project - find locations of outdoor tennis courts on satellite (google maps) images. Even though digging in the documentation and forums is fun (really - this site is very well organized, kudos to the community!), I would appreciate it if you nudge me in the right direction.

I read about feature 2d detection and Line-2D algorithm and it seems to me that either of them might do the trick. However, I wonder if there is a simpler/more efficient method for doing that? In my case, the courts on the images will have the same proportions, the only transformation applied will be rotation. Also, they have no texture.

Thanks a lot! -Andrew