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lvboqqqqqqq
于傅里叶变换的图像加密技术研究
具体是将一幅图像用 fft 变换到频域
在频域中进行加密 我考虑的是通过随机相位来加密的方法，请问用matlab怎样实现
加密后在通过 ifft 得到加密后的图象
(Fourier transform in the image encryption technology to study the details of an image is to use fft transformed to the frequency domain in the frequency domain I consider encryption is through random-phase approach to encryption, Will the use of Matlab how to achieve the adoption of encryption ifft be encrypted images)
- 2006-09-07 20:44:18下载
- 积分：1
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Desktop2
对偏振图像进行融合处理。其中包括比较经典的小波变换，ihs垂直变换以及拉普拉斯金字塔变换。。。(The polarization image fusion processing. Including the more classic wavelet transform, ihs vertical transformation and Laplacian pyramid transformation. . .)
- 2016-10-31 17:40:48下载
- 积分：1
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Nonsampling_Contourlet
说明： 非下采样contourlet变换是一种较新的多尺度几何分析方法，能够很好地描述信号的线奇异特征，具有多方向滤波器组。(Nonsubsampled contourlet transform is a relatively new method of multiscale geometric analysis, can well describe the signal characteristics of the line singularity, with multi-directional filter.)
- 2010-04-20 09:21:50下载
- 积分：1
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DCT
基于离散余弦变换的数字水印，包括水印的嵌入和提取以及常间的各种水印攻击(Discrete cosine transform based on digital watermarking, including the watermark embedding and extraction, as well as between the various watermark attacks often)
- 2010-06-03 20:57:59下载
- 积分：1
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renyanshijuetexing
基于人眼视觉的图像融合方法
很好很经典 符合人眼视觉特性(Based on the human visual image fusion method)
- 2011-06-24 13:06:36下载
- 积分：1
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MeanShift
meanshift聚类，找到聚类中心,以及数据的类别(Clustering meanshift to find cluster centers, as well as the type of data)
- 2007-11-07 15:04:35下载
- 积分：1
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重力正演模型
说明： 学习和掌握简单条件下规则形体重力异常的正演计算方法和形态特征，加深对课堂理论内容的理解。
根据指定形状地质体，选择不同产状和密度参数，计算出重力异常及其导数的正确结果。绘制相应的剖面异常图，观察曲线形态。(Learn and master the forward calculation method and morphological characteristics of gravity anomaly of regular body under simple conditions, and deepen the understanding of classroom theoretical content.
According to the specified shape geological body, different occurrence and density parameters are selected to calculate the correct results of gravity anomaly and its derivative. Draw the corresponding profile anomaly map and observe the curve shape.)
- 2020-11-25 21:11:56下载
- 积分：1
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add_score
在图像中加入某个分数值（int），然后检测这个分数，要求在图像受到攻击时能有效（100％）提取这个值(In the image by adding a Score value (int), then detection of the scores, the requirements in the image can be attacked effectively (100) extraction of this value)
- 2007-07-23 16:41:35下载
- 积分：1
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JPEG-LS
说明： 基于改进JPEG-LS算法的遥感图像近无损压缩专利，由航天五院508所申报，很详细的介绍了算法和fpga的实现(Improved JPEG-LS algorithm near lossless compression patent, the space the five branches of 508 reporting, a detailed explanation of the algorithm and implementation fpga)
- 2021-01-12 17:18:48下载
- 积分：1
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Finger
指纹图像的增强，效果很好,计算指纹的频率和方向，采用Gabor的方式增强(Fingerprint image enhancement, the effect is very good, calculate the frequency and direction of fingerprints, using Gabor way to enhance)
- 2016-01-14 15:22:37下载
- 积分：1
