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2下载:
实用数字签名的步骤
(1)发送方使用MD5算法对原始信息进行计算,获得一个固定长度的信息摘要
(2)发送方用自己的私钥加密生成的信息生成发送方的数字签名,发送方把这个数字签名作为发送信息的附件和明文信息,一同用接收方的公钥进行加密,将加密后的密文一同发送给接收方;
(3)接收方首先把接收到的密文用自己的私钥解密,得到明文信息和数字签名,再用发送方的公钥对数字签名进行解密,然后使用相同的单向散列算法来计算解密得到的明文信息,得到信息摘要;对比计算出来的信息摘要和发送方发送过来的信息摘要
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利用对比度拉伸方法增强图像,函数mean2直接在函数调用内计算平均值-Contrast stretching method to enhance the image, function mean2 directly in the function call to calculate the average
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计算四个方向上的灰度共生矩阵以及角二阶矩,熵,对比度,均匀性-Calculate four directions on the GLCM, as well as angular second moment, entropy, contrast, uniformity
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1.对比度增强:计算并显示图像直方图,直方图均衡;
2.图像分割:Otsu算法;
3.二值图像的数学形态学开闭运算。要求对输入图像二值化,然后实现腐蚀膨胀,最后调用腐蚀膨胀实现开闭。至少给出两种不同形状和大小的结构元素。
-1. Contrast Enhancement: Calculate and display the image histogram, histogram equalization
2. Image Segmentation: Otsu algorithm
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包含了如何计算连续梁桥的redundancy index, reliability index和失效概率的公式,以及如何画维修前和维修后的对比图像-Includes how to calculate the continuous girder bridge redundancy index, reliability index and failure probability of the formula, and how to draw the maintenance and repair of
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文中的方法是把图像分块,小波分解得到低频分量、高频分量,然后计算每一块的对比度,把图像块划分为清晰块、模糊块,把清晰块和模糊块相邻的区域定义为边界区域,融合时,直接选取清晰块作为融合后的相应块,对于边界区域,在小波分解的基础上采用基于对比度的像素选取的方法进行处理。-Paper, the method is to image segmentation, wavelet decomposition are low frequency, high frequency components, then
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对子图像进行局部直方图计算,由最大方差比例阈
值确定方法计算出子图像的最佳阈值。根据局部直方图中波峰数决定是否增强子图像中被最佳
阈值划分出的低灰度区域和高灰度区的对比度。然后对已经选择性对比增强的图像进行边缘检
测。实验证明图像的区域层次更清楚,提取的边缘细节也更丰富。自适应算法则最大限度地突
出了边缘而同时保持了图像中相近灰度级的平滑性和连续性。-Image pairs local histogram calculation by the maximum variance r
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对车辆图像进行一系列处理,有灰度变换,对比度增强,二值化,最后计算车辆实际高度-A series of image processing the vehicle, a gray-scale transformation, contrast enhancement, binarization, and finally calculate the actual height of the vehicle
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通过对图像进行分块处理,再采用模板式逐点扫描,实施一种方向空域滤波,计算指纹的方向对比度-Calculate the contrast of finger image
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对黑白图像进行滤波处理,然后目标提取,并计算目标形态属性-Black and white image filtering, and object extraction, and calculate the properties of the target form
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图像处理中计算图像对比度matlab程序-Image processing matlab program to calculate the image contrast
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单幅图像的平均梯度值计算 MATLAB源程序 【更新】2009-04-15 15:59说明:该程序的作用是计算输入图像img的平均梯度值AVEGRAD
平均梯度值可以衡量图像细节反差表达的能力,是图形融合结果的一个评价算子之一-Single image, the average gradient value MATLAB source code [update] 2009-04-15 15:59 Descr iption: The role of the program is to cal
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这个程序是用来计算图像的主观质量的,当然要有对比的图像才可以。-This program is used to calculate the subjective quality of the image, of course, have the contrast of the image before.
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对一副图像,计算其对比度和相关性这两个纹理指标-On an image to calculate the contrast and texture indicators
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计算三相对称的代码。这可以被用来作为一个行和BLOB探测器。相位对称是照明和图像的对比度,对称不变测度。-Calculate the three-phase symmetrical code. This can be used as a line and BLOB detector. Phase symmetrical lighting and contrast of the image, the symmetric invariant measure.
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朔黄重载铁路轨道不平顺谱计算程序,能计算其轨距不平顺谱,并与国内外统计谱进行对比-the calculating programer of Shuohuang Heavy Hual railway of track irregularity,it can calculate the guage irregularity spectrum,and contrast with the foreignal and national statistic spectrum
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八方向均值比例算子,对每个像素点取半径为r的矩阵,分成八个区域,计算均值比例,选取图像中的对比较为明显的区域-Mean proportion of the eight directions operator, a radius r of the matrix for each pixel is divided into eight regions, and calculate the mean ratio, the selected image of the more obvious contr
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一个对于一维正弦信号的压缩感知恢复算法(正交匹配追踪发)的matlab程序,并绘出恢复图像对比原始图像,且计算出重构误差-A recovery image contrast for the one-dimensional sine signal compression the perceived recovery algorithm (orthogonal matching pursuit fat) matlab program, and draw the original image, and
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In order to capture the spatial dependence of gray-level values which contribute to the perception of texture, a 2d dependence matrix known as a gray-level co-occurrence matrix is extensively used in texture analysis.So, this is a code that calculate
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matlab程序代码 用于计算并显示 图像的积分图,并在同一窗口并列显示对比-Matlab code used to calculate and display the integral image of the image side by side in the same window display contrast
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