prprrp

Score: 72
Uploads: 3
Downloads: 48
Create time: 2020-10-18 13:49:58

Upload log:
plane.rar - 使用python语言编程实现飞机大战小游戏
sock.rar - 用PYTHON实现网络数据嗅探与邮件发送2
affine_cipher.rar - HILL密码加密解密算法实现,仿射密码的加密解密实现

Download log:
clipper2.zip - C++版本的空间多边形切割库clipper的matlab版本,采用mex编译
polygon_offset.rar - 多边形的offset。偏移算法。仅供参考~~~~~~~~~~~~~~~~~~
duobianxingtianchongsuanfa.rar - 扫描线法多边形填充算法,是计算机图形学中基本的作图算法
bianbiaotianchong.rar - 计算机图形学,使用有效边表算法填充多边形
polygon.rar - 典型的多边形填充算法主要包括扫描线填充算法和轮廓标志域填充算法,适用于矢量多边形文件的填充算法为扫描线填充算法
shift.zip - 直线偏移代码,已知多边形顶点坐标,可以将多边形各边沿其法线方向平移距离然后得到新的多边形顶点。
zigZag_matab.zip - zigZag scan implementation on matlab
zigzag.rar - 用matlab实现zigzag扫描程序。
Zigzag-scanning-algorithm.rar - Z字形扫描算法,用于图形图像处理和图像压缩编码。
ImageProcessing.rar - 图像的置乱处理,包括了模板置乱法,幻方置乱法和图像的一个基本加密方法——4bit置换
zhiluan.rar - 置乱函数,用于图像隐藏的几个置乱函数。图像处理也用!
Differential_attacks_analysis.zip - 计算图像处理中的评价指标NPCR和UACI,这两个指标用于表示图像的抗差分攻击能力。
NPCR_and_UACI.m.zip - 计算图像处理中的评价指标NPCR和UACI
npcr-unci.rar - The number of changing pixel rate (NPCR) and the unified averaged changed intensity (UACI) are two most common quantities used to uate the strength of image encryption algorithms/ciphers with respect to differential attacks. Conventionally, a high NPCR/UACI score is usually interpreted as a high resistance to differential attacks. However, it is not clear how high NPCR/UACI is such that the image cipher indeed has a high security level. In this paper, we approach this problem by establishing a mathematical model for ideally encrypted images and then derive expectations and variances of NPCR and UACI under this model. Further, these theoretical values are used to form statistical hypothesis NPCR and UACI tests.
NPCR_and_UACI.rar - analysis of NPCR and UACI of Image
mesure_npcr.rar - Calculate the NPCR between images
img_correlation.rar - 像素相关性计算函数,该指标对于衡量一个加密后的图像安全性能
relativity.zip - 计算图像水平相邻、垂直相邻、对角相邻像素之间的相关性
chengerartodoc.rar - 计算水平相邻像素相关性,修正ij值可以查看垂直对角线相邻像素相关性
image-processing.rar - 用于图像处理上的相邻像素点之间相关性的计算,主要用于分析像素值之间的关联度

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