Color Image Descriptor using Wavelet Correlogram

Image descriptor performs two major tasks of the extracting algorithm. One is to encode image into feature vectors and the other is to measure for comparing a query image and the images in database. This paper proposes a new efficient image descriptor that uses the color feature based on wavelet color-spatial information of an image. In order to evaluate the proposed descriptor, we perform the comparative analysis of existing methods such as color histogram, correlogram, Scalable Color Descriptor (SCD) and wavelet correlogram. Experimantal results provide that the proposed method shows a slightly improvement in the retrieval effectiveness. Especially the proposed image descriptor is more efficient in the search and retrieval of multi-resolution images.