Optical coherence tomography (OCT) is a prevalent, interferometric, high-resolution imaging method with broad biomedical applications. Nonetheless, OCT images suffer from an artifact called speckle, which degrades the image quality. Digital filters offer an opportunity for image improvement in clinical OCT devices, where hardware modification to enhance images is expensive. To reduce speckle, a...

Signal to noise ratio in ultrasound medical images captured through the digital camera is poorer, resulting an inaccurate diagnosis. As a result, it needs efficient despeckling method for clinical practice and telemedicine. This article proposes novel adaptive fuzzy filter based on directionality translation invariant property of Non-Sub sampled Contour-let Transform (NSCT). Since speckle-noise...

A quantum time-dependent spectrum analysis, or simply, quantum spectral analysis (QuSA) is presented in this work, and it’s based on Schrödinger equation, which is a partial differential equation that describes how the quantum state of a non-relativistic physical system changes with time. In classic world is named bandwidth at time (BAT), which is presented here in opposition and as a complemen...

BACKGROUND Ultrasound imaging is safer than other imaging modalities, because it is noninvasive and nonradiative. Speckle noise degrades the quality of ultrasound images and has negative effects on visual perception and diagnostic operations. METHODS In this paper, a nonlocal total variation (NLTV) method for ultrasonic speckle reduction is proposed. A spatiogram similarity measurement is int...