Polar representation of covariance descriptors for circular features
Giovanni Gualdi, Andrea Prati, Rita Cucchiara · Electronics Letters · 2010
The use of polar representation of covariance descriptors, suitable for the classification of circular feature sets, is proposed. It overcomes the implicit limits of state-of-the-art methods based on axis-oriented rectangular patches. The suitability of the proposed solution is verified on two case studies, namely head detection and polymer classification in photomicrograph contexts.