Mehmet Zeytinoglu

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In this paper, we study the peaky nature of wavelet coefficient distributions. The study shows that the wavelet coefficients cannot be effectively modeled by a single distribution. We then propose a new modeling scheme based on a Laplacian mixture model and apply it to the indexing and retrieval of image and video databases. In this work, the parameters of(More)
In this paper, we examine the detection problem of signals with narrowband, harmonically related components received by a passive sensor array. We investigate detector structures based on the Fourier method. The harmonic detector estimates the total signal power by combining the DFT coefficients from harmonic frequency bins. This power estimate is(More)
In this study, we propose a new spread spectrum audio watermarking algorithm that embeds linear chirps as watermark messages. Different chirp rates, i.e., slopes on the time-frequency (TF) plane, represent watermark messages such that each slope corresponds to a different message. We extract the watermark message using a line detection algorithm based on(More)
Audio is a rich source of information in the digital videos that can provide useful descriptors for indexing the video databases. In this paper, we model the shape of the distribution of wavelet coefficients of embedded audio with a Laplacian mixture. The distributions of wavelet coefficients are very peaky in nature. The shape of these distributions can be(More)
CO25 cells, a mouse myoblast line, contain multiple centrioles and primary cilia. A most unusual feature has been the finding of large numbers of separate structures in single cells-up to a maximum of nine centrioles, six primary cilia, and 12 of both organelles together. Aberrant multipolar spindles were occasionally seen containing variable numbers of(More)
1 I n t r o d u c t i o n In the last decade digital coding became the dominant format for all types of audio signals. However, the da ta rate resulting f rom coding high-fidelity digital audio signals is s imply too high for many transmission channels and storage media. Consequently, in recent years data reduction of digital audio signals has received much(More)
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