Abstract - A fl exible multiscale and directional representation for images is proposed. The scheme combines directional fi lter banks with the Laplacian pyramid to provides a sparse representation for two- dimensional piecewise smooth signals resembling images. The underlying expansion is a frame and can be designed to be a tight frame. Pyramidal directional fi lter banks provide an effective method to implement the digital curvelet transform. The regularity issue of the iterated fi lters in the directional fi lter bank is examined.
标签： representation directional multiscale Abstract
上传时间： 2013-12-15
上传用户：zxc23456789
We introduce a sub-cell WENO reconstruction method to evaluate spatial derivatives in the high-order ADER scheme. The basic idea in our reconstruction is to use only r stencils to reconstruct the point-wise values of solutions and spatial derivatives for the 2r-1 th order ADER scheme in one dimension, while in two dimensions, the dimension-by-dimension sub-cell reconstruction approach for spatial derivatives is employed. Compared with the original ADER scheme of Toro and Titarev (2002) [2] that uses the direct derivatives of reconstructed polynomials for solutions to evaluate spatial derivatives, our method not only reduces greatly the computational costs of the ADER scheme on a given mesh, but also avoids possible numerical oscillations near discontinuities, as demonstrated by a number of one- and TWO-DIMENSIONAL numerical tests. All these tests show that the 5th-order ADER scheme based on our sub-cell reconstruction method achieves the desired accuracy, and is essentially non-oscillatory and computationally cheaper for problems with discontinuities.
标签： 高精度格式
上传时间： 2016-01-13
上传用户：ccsdcczd
Two 2D phase unwrapping approaches are included: 1. Phase quality guided path following method. 2. Goldstein's branch cut method. The algorithms are described in: D. C. Ghiglia and M. D. Pritt, TWO-DIMENSIONAL Phase Unwrapping: Theory, Algorithms and Software. New York: Wiley-Interscience, 1998.
标签： Unwrapping Phase 2D
上传时间： 2016-04-30
上传用户：seanjsj
一个将数字转换成文本（例如32转换成thirty two）
上传时间： 2013-12-09
上传用户：chongcongying
Enter Two Numbers:26 35 the sum is 61 Enter Two Numbers:26 35 the sum is 61
上传时间： 2014-01-13
上传用户：1159797854
REMOVE removes a TSR. It takes two command line arguments. The first is the name of TSR to be removed (or an * to remove the last one), and the second is a file name which MUST contain the interrupt vectors to be loaded when the TSR is removed.
标签： TSR arguments removes command
上传时间： 2013-12-09
上传用户：wys0120
This is a package to calculate Discrete Fourier/Cosine/Sine Transforms of 1-dimensional sequences of length 2^N. This package contains C and Fortran FFT codes.
标签： dimensional Transforms calculate sequences
上传时间： 2014-01-14
上传用户：LIKE
SR-tree is an index structure for high-dimensional nearest neighbor queries，C++ sourcecode. SR-tree outperforms the R*-tree and the SS-tree especially for high-dimensional and non-uniform data which are likely to appear in the actual image / video applications.
标签： high-dimensional structure neighbor SR-tree
上传时间： 2013-12-10
上传用户：zjf3110
The Obfuscated Tiny C Compiler (OTCC) is a very small C compiler. It generate i386 code,include two version.The one generate bin file,the other generate elf file
标签： Obfuscated Compiler compiler generate
上传时间： 2015-04-12
上传用户：windwolf2000
write code to read the PCI configuration information, there are two ways.
标签： configuration information write there
上传时间： 2015-05-09
上传用户：chens000
