Content-Based Image Retrieval Based on Location-Independent Regions of Interest

Abstract

In this chapter, a technique of object-based image retrieval to retrieve the images based on location-independent region of interest (ROI) is given. In this technique, instead of extracting the features of the whole query image, features of the objects of interest are extracted using morphological operations. First, background subtraction is performed to reduce the effect of background intensities, then segmentation is performed, and the regions are extracted. To minimize the number of comparisons in image retrieval process, the image is categorized into texture and non-texture regions. Tetrolet transform is used to retrieve the texture features for the texture regions, while moment invariants and edge features are used for non-texture regions.