A wavelet-based method for speckle suppression in ultrasound images of the thyroid gland is introduced. The classification of image pixels as speckle or part of important image structures is accomplished within the framework of back-propagation tracking and singularity detection of wavelet transform modulus maxima, derived from inter-scale analysis. A comparative study with other de-speckling t...

In recent years, medical image processing has been a hot issue for researchers at home and abroad. Considering the characteristics of medical image collection and speckle noise distribution, a de-speckling algorithm based on an improved polar coordinate is present in this paper. Firstly, a logarithmic transformation is applied to the noisy medical image in polar coordinates system and then full...

The unavoidable speckle in SAR images seriously interferes with image quality and has a negative effect on subsequent interpretation. existing filters still need to be strengthened terms of both noise suppression edge preservation. Based this, novel non-local means filter by multi-directional local plane inclination angle (MDLPIA) is proposed. proposed uses the MDLPIA reconstruct new weight fun...

Image de-speckling is one of the most challenging issues in multimedia imaging systems. All available speckle noise reduction filters are almost capable but failed to restore subtle features such as low gray level edges and fine details under poor contrast background. This paper presents a two phase ultrasound image framework by utilizing capability non-local mean filtering method for edge pres...

This work, conceptually envisaged by Prof. R. B. Fisher, undertook the augmentation of one of the original approaches in the dense stereo eld by Cox et al. [1]. The aim was to introduce explicit vertical constraint into the Cox algorithm and reduce the streaking and speckling noise e ects commonly associated with stereo results from this approach. These e ects are commonly attributed to the lac...

Ultrasound diagnosis is a widely used medical tool. Among the various ultrasound techniques, ultrasonic imaging is particularly relevant. This paper presents an improvement to a two-dimensional (2D) ultrasonic system using measurements taken from perpendicular planes, where digital signal processing techniques are used to combine one-dimensional (1D) A-scans were acquired by individual transduc...

New system for a wide-field CARS microscopy is demonstrated, including two schemes of non-phase-matching illumination. Several advantages including high Stokes pulse energy, pulse-to-pulse stability and inherent synchronization between pump and Stokes pulses were brought by use of methane-filled Raman converter. Spatial resolution of the system with axially symmetric illumination, 0.5 microm, w...