Stamp processing with examplar features
  Document digitization is becoming increasingly crucial. In this work, we propose a shape based approach for automatic stamp verification/detection in document images using an unsupervised feature learning. Given a small set of training images, our algorithm learns an appropriate shape representation using an unsupervised clustering. Experimental results demonstrate the effectiveness of our framework in challenging scenarios. 
Yash Bhalgat, Mandar Kulkarni, Shirish Karande, Sachin Lodha
cs.CV