Medical ultrasound images are widely used for diagnostic purposes. A major problem regarding these images is in their inherent corruption by speckle noise. The presence of speckle noise severely hampers the interpretation and analysis of medical ultrasound images. The objective of the paper is to propose a method for removal of noise in the medical ultrasound images. The image noise content is ...

Breaking the noise floor: A framework for correcting the noise-induced bias in noisy magnitude MR signals Cheng Guan Koay, Evren Özarslan, Peter J. Basser STBB / NICHD, National Institutes of Health, Bethesda, MD, United States MR signals are complex numbers where the real and imaginary components are independently Gaussian distributed [1]. The phase of the complex MRI signal is highly sensitiv...

In the present study, silver nanoparticles were synthesized by decomposition of AgNO3 via gelcasting. Methacrylamide was used as a low toxic monomer for gel formation. Effect of monomer content (MAM), cross-linker to monomer ratio (MBAM/MAM), silver salt to monomer ratio (AgNO3/MAM), duration of calcination, and temperature of calcination were investigated to optimize the size of nanoparticles....

The number of channel estimates that have to be estimated in Multiple-Input Multiple-Output (MIMO) system is in general much larger, than in a single antenna communication scheme. This leads to lower signal to noise ratios (SNR) of the channel estimates if a constant pilot power independent from the number of transmit antennas is assumed. The use of long-term spatial channel characteristics can...

Visual information transmitted in the form of digital images is becoming a major method of communication in the modern age, but the image obtained after transmission is often corrupted with noise. The received image needs processing before it can be used in applications. A New Fuzzy Filter that adopts Fuzzy Logic is proposed in this paper which removes Gaussian Noise from the Corrupted Gray sca...

Ship noise observation is of great significance to marine environment research and national defense security. Acoustic stealth technology makes a variety ship significantly reduced, which new challenge for monitoring. However, there are few high spatial gain detection methods low-noise Therefore, Signal-to-Noise Ratio (SNR) MEMS listener developed in this paper. The achieves considerable by sup...

An algorithm for restoration of the images contaminated by additive white Gaussian noise is proposed. The groups of patches are found by the proposed block similarity search algorithm of reduced complexity performed on block patches in transform domain. When the noise variance is small, the proposed filter uses an additional stage based on principal component analysis; otherwise the experimenta...

We consider the problem of transmitting a correlated Gaussian source over an AWGN channel. This paper contains two main contributions which aid in the design of such a system. We determine the characteristic curves of the source decoder for use in the extrinsic information transfer charts (EXIT charts) and show how the characteristic curves vary with the amount of correlation in the source. Fur...

This paper describes computationally efficient algorithms for estimating the parameters of a complex linear FM signal in white Gaussian noise. Algorithm I deals with the high signal to noise ratio (SNR) case (above -4dB for a s y m p totically long signals). Algorithms I 1 and 111 are for the low SNR range. Algorithm 11 is based on the maximum likelihood (ML) approach, but takes advantage of th...