The combination of different selection methods and variety image processing operations makes it possible for many usefull cases.
A usefull usecase is to extract profile picture automatically from user picture.
https://res.inteliver.com/media/v1/cloudname/resource.jpg
https://res.inteliver.com/media/v1/cloudname/i_c_face,i_h_200,i_w_200,i_o_crop,i_o_rcrop,i_o_format_png/resource.jpg
Another usecase is to blur faces in image to protect the privacy of public shared image data.
https://res.inteliver.com/media/v1/cloudname/resouce.jpg
https://res.inteliver.com/media/v1/cloudname/i_c_face,i_o_blur_30/resource.jpg
Please visit our playground for more predefined usecases.