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2018年9月7日，国际学术期刊J Cell Biol 在线发表了中国科学院生物化学与细胞生物学研究所程红研究组的最新研究成果“Intronless mRNAs transit through nuclear speckles to gain export competence”，首次揭示了具备出核能力的RNP的装配位点——亚细胞核结构nuclear speckle。Nuclear speckle...
COMPARISON OF FILTERS DEDICATED TO SPECKLE SUPPRESSION IN SAR IMAGES
SAR Images Radar Images Filtering Mathematical Morphology Speckle Suppression
2016/11/23
This paper presents the results of research on the effectiveness of different filtering methods dedicated to speckle suppression in SAR images. The tests were performed on RadarSat-2 images and on an ...
Reflection-type holographic disk-type memory using three-dimensional speckle-shift multiplexing
holographic memory reflection-type hologram speckle shift multiplexing
2016/11/22
This review presents a reflection-type holographic memory using three-dimensional(3D) speckle-shift multiplexing. First, the schematic of the proposed memory system was described. Then, experimental d...
A METHOD FOR SAR SPECKLE REDUCTION BASED ON PARTIAL DIFFERENTIAL EQUATION
Image processing Filtering Digital photogrammetry Feature detection Geography
2015/12/31
Synthetic Aperture Radar (SAR) has been get broad recognition and application in many domains such as surveying and mapping.But the SAR speckles influence the interpretation of the image badly. In thi...
THE EFFECT OF SPECKLE REDUCTION ON COHERENCE ESTIMATION AND INTERFEROMETRIC PHASE OF INSAR
SPECKLE REDUCTION COHERENCE ESTIMATION INTERFEROMETRIC PHASE OF INSAR
2015/12/30
Synthetic aperture radar (SAR) images always suffer from strongly speckle noise, which is a great obstacle to coherence (or correlation coefficient) estimation and interferometric phase, furthermore h...
Speckle Denoising Based on Bivariate Shrinkage Functions and Dual-Tree Complex Wavelet Transform
Transformation Algorithms SAR Radiometric Processing, Image
2015/11/20
Bivariate shrinkage functions (bsf) statistically denoted as joint probability density functions (pdf) and noise pdf, can be united by MAP to denoise image. Because the intensity of speckle in synthet...
Wavelet Speckle Reduction for SAR Imagery Based on Edge Detection
Image processing Filtering Feature detection Geography Image understanding
2015/11/20
This paper introduces a wavelet transform speckle reduction algorithm for Synthetic Aperture Radar (SAR) imagery based on edge detection. Existing speckle algorithm can efficiently reduce the speckle ...
A Comparative Study of Three Speckle Reducing Methods for Intima-Media Thickness Ultrasound Images
Carotid Intima-Media Thickness Brachial Artery Ultrasonography Noise
2015/10/20
Background: Ultrasonic evaluation of intima-media thickness (IMT) is an early marker of assessing the development of atherosclerosis and determining cardiovascular risk. To attain the best possible di...
EFFECTS AND PERFORMANCE OF SPECKLE NOISE REDUCTION FILTERS ON ACTIVE RADAR AND SAR IMAGES
RADAR SAR Images Noise Speckle Filtering Adaptive Filter
2015/8/17
Reduction of speckle noise is one of the most important processes to increase the quality of radar coherent images. Image variances
or speckle is a granular noise that inherently exists in and degra...
THE CONTRAST RESEARCH OF THE METHODS OF RESTRAINING THE SPECKLE NOISE OF SAR IMAGES
SAR High resolution Method Analysis Model
2015/6/1
There commonly exists speckle noise in the SAR images. It badly disturbs the extraction and interpretation of the information of the objects, influences the application of the SAR images. So it has im...
A SAR SPECKLE FILTERING ALGORITHM TOWARDS EDGE SHARPENING
Radar Speckle Reduction Texture Image Processing
2014/12/29
One of the major difficulties when classifying synthetic aperture radar (SAR) images is the existence of speckle due to coherent processing. Existing speckle filtering algorithms can effectively reduc...
Comparison of Different Edge Detections and Noise Reduction on Ultrasound Images of Carotid and Brachial Arteries Using a Speckle Reducing Anisotropic Diffusion Filter
Carotid Artery Brachial Artery Immature Thymocyte-Specific Antigen (IMT)
2015/10/14
Background: Common carotid artery (CCA) ultrasound with measurement of intima-media thickness (IMT) is a safe and noninvasive technique for assessing subclinical atherosclerosis and determining cardio...
Speckle Reduction in Imaging Projection Systems
Diffractive Diffusers Speckle Contrast Reduction Laser Pico-Projectors
2013/1/30
Diffractive diffusers (phase gratings) are routinely used for homogenizing and beam shaping for laser beam applications. Another use for diffractive diffusers is in the reduction of speckle for pico-p...
Application of speckle and (multi-object) multi-frame blind deconvolution techniques on imaging and imaging spectropolarimetric data
Sun: photosphere – Sun: spectropolarimeters
2011/9/27
We test the effects of reconstruction techniques on 2D data to determine the best approach. We obtained a time-series of spectropolarimetric data in the Fe I line at 630.25 nm with the Goettingen Fabr...
Computer Generated Quadratic and Higher Order Apertures and Its Application on Numerical Speckle Images
Higher Order Modulated Apertures Speckle Imaging Resolution Point Spread Function
2013/1/30
A computer generated quadratic and higher order apertures are constructed and the corresponding numerical speckle images are obtained. Secondly, the numerical images of the autocorrelation intensity o...