I have a CNN based object detector trained on WIDER Face dataset. It can successfully detect human faces in a given image.
Now, I am trying to detect abstract face and minimalistic face patterns in clouds or houses etc but having no success.
Initially, I thought I could lower the detection threshold to detect such patterns, but such scheme didn't work.
My question is there any way other than collecting and labelling such training examples (face like patterns) to solve this problem.