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HESSIAN
黑塞矩阵（Hessian Matrix），又译作海森矩阵、海瑟矩阵、海塞矩阵等，是一个多元函数的二阶偏导数构成的方阵，描述了函数的局部曲率。黑塞矩阵最早于19世纪由德国数学家Ludwig Otto Hesse提出，并以其名字命名。黑塞矩阵常用于牛顿法解决优化问题，利用黑塞矩阵可判定多元函数的极值问题。在工程实际问题的优化设计中，所列的目标函数往往很复杂，为了使问题简化，常常将目标函数在某点邻域展开成泰勒多项式来逼近原函数，此时函数在某点泰勒展开式的矩阵形式中会涉及到黑塞矩阵。(Hessian Matrix, is a square matrix of the second order partial derivative of the multivariate function, which describes the local curvature of the function. The Hesse matrix was first proposed by the German mathematician Ludwig Otto Hesse in the 19th century and named after it. Hesse matrix is often used in Newton method to solve the optimization problem, using the black plug matrix to determine the extreme function of the extreme value problem.)
- 2017-09-12 13:58:39下载
- 积分：1
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PCA_change_detecttion
变化检测的常用方法：基于pac的变化检测方法，结果很好！(Common method of change detection: pac change detection method based on the results of good!)
- 2020-11-22 14:49:34下载
- 积分：1
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1-s2.0-S003132031000213X-main
some fast feature extraction algorithms are addressed for joint retrieval of images
compressed in JPEG and JPEG2000 formats. In order to avoid full decoding, three fast algorithms that
convert block-based discrete cosine transform (BDCT) into wavelet transform are developed, so that
wavelet-based features can be extracted from JPEG images as in JPEG2000 images.
- 2013-08-05 13:43:39下载
- 积分：1
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一篇重要的角点检测文献的配套Matlab源码corner_detector_2004
这是2004年一篇重要的角点检测文献的配套Matlab源码。该算法的效果比SIFT、Harris、Susan等算法的检测效果更好。本压缩包中有从Matlab官方网站下载的源码，以及2004年那篇文献，对该算法做了详细解释。(This is 2004, an important corner detection literature supporting Matlab source code. Of the algorithm is better than SIFT, Harris, Susan, such as better detection algorithm. The compressed package from the official website to download the Matlab source code, and in 2004 came across the literature, the algorithm to do a detailed explanation.)
- 2021-01-09 17:48:51下载
- 积分：1
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NECdigitalwatermark
经典数字水印算法，包括GUI实现
可直接运行(classic digital watermarking algorithm, including the realization of GUI can run)
- 2020-07-02 03:00:01下载
- 积分：1
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lossless-lwatermarking--model
一种基于可逆信息隐藏的的无损鲁棒数字水印模型的研究(Study on framework model of lossless robust digital watermarking based on reversible data hiding)
- 2020-11-05 16:09:52下载
- 积分：1
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3d-FDTD-UPML__3D
三维时域有限差分法结合UPML吸收边界条件模拟程序(Three-dimensional finite-difference time-domain method combined with UPML absorbing boundary conditions)
- 2021-01-17 17:18:46下载
- 积分：1
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SAR_image_processing
SAR复数数据转换，RAW格式数据转换，雷达图像滤波，LEE-sigema滤波，Frost滤波，Gamma-MAP滤波，KUAN滤波，雷达图像几何处理，斜距到地距转换程序。(SAR complex data conversion, RAW format, data conversion, radar image filtering, LEE-sigema filter, Frost filter, Gamma-MAP filtering, KUAN filtering, radar image geometry processing, slant range to ground from the conversion process.)
- 2010-01-26 09:52:42下载
- 积分：1
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83390053ZoomInOut_IDL
非常不错的IDL实现的放大缩小代码，希望能给大家带来方便(Achieved a very good zoom IDL code, I hope that it brings convenience)
- 2010-06-22 09:15:14下载
- 积分：1
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tuxiangruihua
对已有图像进行锐化，这里有不同的方法对比，效果非常好，非常显著(The existing image sharpening, there are different methods to contrast, effect is very good, is very significant
)
- 2013-06-20 21:20:03下载
- 积分：1
