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Using multiple mobile sinks for data gathering, such as Area Splitting Algorithm (ASA), has improved the performance of Wireless Sensor Networks (WSN) in terms of network latency and power consumption. However, for time and energy constrained mobile sinks in large scale WSNs, a large number of mobile sinks is required. Furthermore, a load balance method on such mobile elements is necessary in order...
With the recent advances in internet and multimedia technologies by which the exchange and the transmission of information became easy, encryption methods have been proposed to protect confidential and secure digital data from illegal access. In this paper, we propose a new image encryption model that uses the Frei-Chen bases. The projections of the Frei-Chen bases on the image are used to represent...
Vehicle engine faults are serious faults that occur inside the engine, the ability to successfully perform fault diagnosis is highly dependent on technician skills. Some experienced technicians have some failure rate, which can lead to serious waste in time and money. Accordingly, an improved diagnosing methods is highly needed. In this paper, we develop an algorithm for fault diagnosis in vehicle...
Directed Information (DI) is used to quantify the causal and dynamic relations between two signals. The main advantage of using DI compared to other measures of causality is that it does not assume an underlying signal model and thus can capture both linear and nonlinear interactions between signals. However, one major problem in computing the DI from data is the high computational cost and the unreliability...
In this paper, we introduce a new multibit watermarking method for speech signals in the joint time-frequency domain. The Wigner distribution for the speech signal is computed and the time-frequency cells in the Wigner domain that are robust to attacks are used for watermark embedding. The error introduced by the inversion of the watermarked distribution is quantized and used as a key for watermark...
In this paper we propose a new method of using motion estimation for the purpose of offline recognition of machine-print Hindi digits. The recognition process can be summarized as follows: an image of each of the ten numerals (numbers 0 to 9) is stored, these are called reference images. The differences between the image of the numeral to be recognized and the reference image are considered motions...
One of the main application of image encryption is to transmit secure information between parties. The aim is to transmit the image securely over the network such that no unauthorized user be able to decrypt the image. In this paper, we propose a new encryption algorithm by transforming the original image into the encrypted one using randomly generated vectors. The original image is decrypted by applying...
Two directed information measures have been used extensively in literature to evaluate the direction of information flow between two time series. The relationship between these two measures, however, has not been established as to date. In this letter, we derive a formula that defines the relationship between these two measures. We also offer some insights into the interpretation of these measures...
In this paper, we introduce a new robust image watermarking technique based on the discrete wavelet transform (DWT). The proposed method extends the concept of image denoising to watermarking. A spatially adaptive wavelet thresholding method is used to select the coefficients to be watermarked. A multi-bit watermark is embedded into the discrete wavelet coefficients of the host image. A semi-blind...
In this paper, a new watermarking scheme in the joint time-frequency domain is introduced. Wigner distribution is used to transform an image into the spatial-spectral domain. The proposed method selects the time-frequency cells to be watermarked based on the particular image's energy distribution in the joint domain. This approach ensures the imperceptibility of the embedded watermark. It is shown...
In this paper, we introduce a new multi-bit watermarking method in the joint time-frequency domain. The Wigner distribution for the edges of an image is computed and the time-frequency cells in the Wigner domain that are robust to attacks are used for watermark embedding. The error introduced by the inversion of the watermarked distribution is quantized and used as a key for watermark extraction....
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