Image preprocessing for CBIR system

This article describes the way in which image is prepared for content-based image retrieval system. Our CBIR system is dedicated to support estate agents. In our database there are images of houses and bungalows. All efforts have been put into extracting elements from an image and finding their characteristic features in the unsupervised way. Hence, the paper presents segmentation algorithm based on a pixel colour in RGB colour space. Next, it presents the method of object extraction in order to obtain separate objects prepared for the process of introducing them into database and further recognition. Moreover, a novel method of texture identification which is based on wavelet transformation, is applied.