Retrieving Objects Using Local Integral Invariants

The use of local features in computer vision has shown to be promising. Local features have several advantages including invariance to image transformations, independence of the background, and robustness in difficult situations like partial occlusions. In this paper we suggest using local integral invariants to extract local image descriptors around interest points and use them for the retrieval task. Integral invariants capture the local structure of the neighborhood around the points where they are computed. This makes them very well suited for constructing highly-discriminative local descriptors. We study two types of kernels used for extracting the feature vectors and compare the performance of both. The dimensionality of the feature vector to be used is investigated. We also compare our results with the SIFT features. Excellent results are obtained using a dataset that contains instances of objects that are viewed in difficult situations that include clutter and occlusion.

• Type: Conference
• Year: 2006
• Where: CIVR
• Authors: Alaa Halawani, Hashem Tamimi
• Keywords: CIVR 2006, Difficult Situations, Image Analysis, Integral Invariants, Local Features