Performance of the Progressive Wavelet Correlation for Image Retrieval

In the paper we present our experience with using progressive wavelet correlation for image retrieval. We perform a series of image search experiments that cover the following scenarios: (A) the given image is present in the database; (B) copies of the given image are present but with different names; (C) similar (but not identical) images are present; and (D) the given image is not present. Experiments are performed with data bases up to 1000 images, using the Oracle database and the Matlab component Database Toolbox for operations with databases

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Pixel-Based Searching for Object Location in a JPEG Image

In the paper we apply pixel-based searching to locate objects in the JPEG image. We make use of progressive wavelet correlation along with Fourier method. The image is searched step by step. The searching consists of three incremental steps, each of which quadruples the number of correlation points. The process can be halted at any stage if the intermediate results indicate that the correlation will not result in a match

Special Issue on Electronic, Telecommunications, Automation, and Informatics with Computer Science (ETAI) Preface

[No Abstract Available

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Normalized Correlation Coefficients for Searching JPEG Images

There are two ways of using the normalized correlation coefficients. The first one is for locating objects in the JPEG image, and the second one for locating given image in an image library. In the paper we apply normalized correlation coefficients for searching JPEG images. We make use of progressive wavelet correlation along with Fourier method. The image is searched step by step. The searching consists of three incremental steps, each of which quadruples the number of correlation points. The process can be halted at any stage if the intermediate results indicate that the correlation will not result in ca match

Web Based Tools for Signals and Systems Course

In this paper we present web-based tools that visualize standard concepts (convolution of analog and discrete signals, pole-zero diagram, Fourier series, sampling and reconstruction) in a classical Signal and Systems course. The tools can be used by a teacher as a teaching aid to explain basic concepts in Signal and Systems course. They can also be used by students as a learning aid. They are easy for use and can be used in different locations using different operating systems

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