Optical scanning holography (OSH) records both the amplitude and phase information of a 3D object by 2D scan. To reconstruct volumetric image from an OSH hologram is difficult, as it suffers defocus noise other sections. The use random pupil can convert into speckle-like noise, which may require further processing in sectional reconstruction. In this paper, we propose U-shaped neural network to...

In recent time, ultrasound imaging is a popular modality for various medical applications. The presence of speckle noise affects difficulties on features extraction and quantitative measurement of ultrasound images. This paper proposes a new method to suppress the speckle noise while attempting to preserve the image content using combination of Gaussian filter and discrete cosine transform (DCT...

In this paper, we investigate the use of the non-local means (NLM) denoising approach in the context of image deblurring and restoration. We propose a novel deblurring approach that utilizes a non-local regularization constraint. Our interest in the NLM principle is its potential to suppress noise while effectively preserving edges and texture detail. Our approach leads to an iterative cost fun...

We present super-resolution methods that enhance image contrast and perform anisotropic diffusion simultaneously. Since we solve the super-resolution problem by encouraging Mach-band profiles while incorporating anisotropic diffusion, our technique not only reconstructs a high-resolution image from several overlapping noisy low-resolution images, but also enhances edges and image contrast while...

Multiple features can be extracted from time-frequency representation of signals for the purpose acoustic event detection. However, many underwater are formed by multiple events (impulsive and tonal), which generates difficulty on high-resolution TFR each component. For characterization such different events, we propose an anisotropic chirplet transform to achieve with high energy concentration...

In the high-speed digital printed circuit board, decoupling capacitors play an important role in lowering the power-ground planes impedance leading to the ground bounce noise in I/O ports while the logic is in transition. This paper investigates the optimal placement of decoupling capacitors in suppressing the input and transfer impedances of power-ground planes. The cavity model combines with ...