Faster R-CNN, R-FCN, and SSD are three of the best and most widely used object detection models out there right now. Other popular models tend to be fairly similar to these three, all relying on deep CNN’s (read: ResNet, Inception, etc.) to do the initial heavy lifting and largely following the same proposal/classification pipeline. At this point, putting these models to use just requires knowing Tensorflow’s API. Tensorflow has a starter tutorial on using these models. Give it a try!