搜索结果: 1-15 共查到“知识库 信息处理技术 Z-transform”相关记录17条 . 查询时间(0.125 秒)
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...
Adaptive Spatial and Transform Domain FGS Coding
Adaptive Spatial Transform Domain FGS Coding
2010/12/17
In inter-picture coding, block-based frequency transform is usually carried out on the predicted errors for each interblock to remove the spatial correlation among them.
However, it can not always do...
Low-complexity adaptive block-size transform based on extended transforms
Low-complexity block-size transform extended transforms
2010/12/16
In this paper, a low-complexity 8x8/4x4 Adaptive Blocksize Transform (ABT) scheme is tentatively proposed for the Chinese Audio and Video coding Standard (AVS)1.In the proposed ABT scheme, an integer ...
Adaptive Block-Size Transform Based on Extended Integer 8x8/4x4 Transforms for H.264/AVC
Block-Size Transform Extended Integer 8x8/4x4 Transforms H.264/AVC
2010/12/16
In this paper, a low-complexity Adaptive Block-size Transform (ABT) scheme is proposed for the H.264/AVC.The integer 8x8/4x4 discrete cosine transforms with an extended relation are applied to the pro...
Linear Transform Based Motion Compensated Prediction for Lumiance Intensity Changes
Linear Transform Based Motion Compensated Prediction Lumiance Intensity Changes
2010/12/15
A linear transform based motion compensated prediction (LTMCP)scheme is proposed in this paper to improve the efficiency of inter-frame prediction when the intensity of luminance
changes abruptly acr...