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西安电子科技大学数字信号处理英文课件Chapter4 The Z-transform。
GF-3 SAR IMAGE DESPECKLING BASED ON THE IMPROVED NON-LOCAL MEANS USING NON-SUBSAMPLED SHEARLET TRANSFORM
GF-3 SAR non-subsampled Shearlet transform image despeckling improved Non-Local Means
2018/5/15
GF-3 synthetic aperture radar (SAR) images are rich in information and have obvious sparse features. However, the speckle appears in the GF-3 SAR images due to the coherent imaging system and it hinde...
延安大学数字信号处理课件Chapter 2 The Discreete-Time Fourier Transform (DTFT)
延安大学 数字信号处理 课件 Chapter 2 The Discreete-Time Fourier Transform (DTFT)
2018/3/15
延安大学数字信号处理课件Chapter 2 The Discreete-Time Fourier Transform (DTFT)。
CONTENT PRESERVING WATERMARKING FOR MEDICAL IMAGES USING SHEARLET TRANSFORM AND SVD
Watermarking Medical images Shearlet transform SVD
2017/6/19
Medical Image Watermarking (MIW) is a special field of a watermarking due to the requirements of the Digital Imaging and COmmunications in Medicine (DICOM) standard since 1993. All 20 parts of the DIC...
A Watermarking Algorithm for Vector Spatial Geo-Data Based on Integer Wavelet Transform
Digital Watermarking Vector Geo-Spatial Data Integer Wavelet Transform Robust
2015/12/11
Considering the characteristic of vector geo-spatial data for digital watermarking, this paper presents a new watermarking algorithm for vector geo-spatial data based on integer wavelet transform. By ...
Gray and Color Image Contrast Enhancement by the Curvelet Transform
Contrast enhancement curvelets ridgelets wavelets
2015/6/17
We present in this paper a new method for contrast enhancement based on the curvelet transform. The curvelet transform represents edges better than wavelets, and is therefore well-suited for multiscal...
Astronomical Image Representation by the Curvelet Transform
methods Data Analysis-techniques Image Processing
2015/6/17
We outline digital implementations of two newly developed multiscale representation systems, namely, the ridgelet and curvelet transforms. We apply these digital transforms to the problem of restoring...
Super-resolution via Transform-invariant Group-sparse Regularization
Super-resolution Transform-invariant Group-sparse
2015/6/17
We present a framework to super-resolve planar regions found in urban scenes and other man-made environments by taking into account their 3D geometry. Such regions have highly structured straight edge...
Rate-distortion Optimized Transform for Intra-frame Coding
Rate-distortion Optimized Transform Intra-frame Coding
2010/12/21
In this paper, a novel algorithm is proposed for intra-frame coding, named as rate-distortion optimized transform (RDOT). Unlike existing intra-frame coding schemes where the transform matrices are ei...
Open Quotient Measurements Based on Multiscale Product of Speech Signal Wavelet Transform
Open Quotient Measurements Multiscale Product Speech Signal Wavelet Transform
2009/9/4
This paper describes a multiscale product method (MPM) for open quotient measure in voiced speech. The method is based on determining the glottal closing and opening instants. The proposed approach co...
Psychoacoustic Music Analysis Based on the Discrete Wavelet Packet Transform
Psychoacoustic Music Analysis Discrete Wavelet Packet Transform
2009/9/4
Psychoacoustical computational models are necessary for the perceptual processing of acoustic signals and have contributed significantly in the development of highly efficient audio analysis and codin...
On Optimal Bit Allocation for Classification-Based Source-Dependent Transform Coding
Optimal Bit Allocation Source-Dependent Transform Coding
2009/9/4
An optimal bit allocation is presented for classification-based source-dependent transform coding. A vector of transform coefficients is considered to have been produced by a mixture of processes. The...
An Adaptive Resolution Computationally Efficient Short-Time Fourier Transform
Adaptive Resolution Computationally Efficient Short-Time Fourier Transform
2009/9/4
The short-time Fourier transform (STFT) is a classical tool, used for characterizing the time varying signals. The limitation of the STFT is its fixed time-frequency resolution. Thus, an enhanced vers...
Efficient Multiple-Description Image Coding Using Directional Lifting-Based TransformEfficient Multiple-Description Image Coding Using Directional Lifting-Based Transform
Efficient Multiple-Description Image Coding Directional Lifting-Based
2010/12/17
This paper proposes an efficient two-description image coding technique. The two side descriptions of an image are generated by quincunx subsampling. The decoding from any
side description is done by...
Macroblock-Level Adaptive Scan Scheme for Discrete Cosine Transform Coefficients
Macroblock-Level Discrete Cosine Transform Coefficients
2010/12/17
Discrete Cosine Transform (DCT) has been widely used in image/video coding systems, where zigzag scan is usually employed for DCT coefficient organization. However, due to local
diversity of predicti...