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Radial Tchebichef moments as a discrete orthogonal moment in the polar coordinate have been successfully used in the field of pattern recognition. However, the scaling invariant property of these moments has not been studied due to the complexity of the problem. In this paper, we present a new method to construct a complete set of scaling and rotation invariants extract from radial Tchebichef moments,...
Natural scene categorization is a fundamental process of human vision that allows us to efficiently and rapidly analyze our surroundings. Thousands of images are generated every day, which implies the necessity to classify, organize and access them using an easy, faster and efficient way. Scene classification, the classification of images into semantic categories (e.g., coast, mountains, highways...
A novel, modified direct method for Orthogonal Fourier-Mellin Moments (OFMMs) computation, which lacks of any factorial terms, is presented. The proposed algorithm is based on the substitution of the factorial terms by their approximate values, according to Stirling's Approximation formula. In this way, a new set of orthogonal moments, which are approximate versions of the original ones, are extracted...
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