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Description: 基于轮廓的形状特征提取
1)该程序在VC＋＋6.0下编译通过；
2)测试图片说明：（图像路径名请在main函数中fp=fopen("1.bmp","rb")中设定）
64×64 24bit BMP：
图像1、2用来验证旋转图像识别；图像1、3用来验证平移图像识别；图像1、4用来验证缩放图像识别；
120×120 24bit BMP：
图像5、6用来验证平移图像识别；图像7、8用来验证旋转图像识别；
3)结果说明：
MCS.dat保存了Mountain Climbing Sequence。
-Based on the outline of the shape feature extraction 1) the program in VC 6.0 under the compiler through 2) Test Photo Caption: (image path name in the main function fp = fopen (1.bmp, rb) set) 64 × 64 24bit BMP: image 1,2 to verify rotating image recognition image 1,3 to verify translational image recognition image 1,4 to verify scaling image recognition 120 × 120 24bit BMP: images used to verify translational 5,6 image recognition images 7,8 rotate images used to verify identification 3) The results indicate that: MCS.dat preserved Mountain Climbing Sequence.
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Size: 3072 |
Author: 方哲 |
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Description: 对于BMP格式的图象,其前54个字节未文件头信息，从第55个字节开始到结束的所有数据，都是图像颜色数据。如果仅仅修改图像颜色数据而不修改文件头信息，则bmp图像大小不变且可以正常使用。当然，为了控制图像的质量，对于数据的植入方式，我们需要稍加斟酌。一个bmp图像要隐藏我们指定的信息，储存空间必不可少。为了保证信息植入前后图像的质量不发生明显的变化，我们只有把信息写到bmp图像颜色数据的每个字节的低位上。这样，每个字节的改变量不超过0Fh，对图像品质的影响非常小，用肉眼几乎分辨不出来。在源码包中有对比图，大家可以亲自对比验证。
原理即 ：用原来bmp图像颜色数据的相邻两个字节的低位来存放隐藏信息的一个字节的内容。
如隐藏信息的某个字节数据位为 3E ，bmp图像颜色数据两相邻字节的内容为：5F 27 ，处理后该相邻字节的内容变为53 2E。这样处理，一张mbp图像可以存放其自身长度2分之1大小的信息，效果不错。-The BMP format images, its former 54-byte file header information is not, from the first 55 bytes beginning to the end of all the data is color image data. If you only modify the data without modifying the color image file header information, then bmp image size unchanged and can be normal use. Of course, in order to control image quality, for the implantation of the way the data, we need a little discretion. A bmp image to hide our designated information, storage space is essential. Information in order to guarantee the quality of images before and after implantation no obvious change, we can only put information wrote bmp image color data for each byte on the low. In this way, each byte to change the volume of not more than 0Fh, the impact on image quality is very small, almost to tell with the naked eye do not come out. Source package has at contrast map, everyone can personally verify comparison.
Principle namely: bmp image with the original color data of adjacent two of the l
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Size: 25600 |
Author: lizhoujian |
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Description: 摘 要: video4 linux提供了一整套linux环境下操纵视频设备的函数接口,首先通过对video4 linux函数的调用成
功实现了两种方式(内存映射(mmap)和直接读取( read) )下摄像头数据的读取 然后对读取到内存缓冲区中的
RGB数据流进行分析,实现了同时对两种特定颜色(红、绿、蓝等)的识别,并给出相应色块的端点坐标 最后通过
对特定颜色箭头的端点分析,识别了箭头指向的角度 为了便于调试程序和验证结果,分析完成后把缓冲区中的
RGB流保存为BMP文件。-Abstract: video4 linux environment to provide a set of linux video equipment under the control of the function interface, the first function of the call video4 linux successfully in two ways (memory mapping (mmap) and direct reading (read)) under the camera data read then read into memory buffer of RGB data flow analysis, achieved at the same time for two specific colors (red, green, blue, etc.) to identify, and give the corresponding color coordinates of the endpoint final arrow on the specific color of the endpoint analysis, identification of the arrow point to the point of view In order to facilitate the debugging process and to verify the results of analysis after the completion of the RGB buffer to save it as a BMP file stream.
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Size: 223232 |
Author: db_tiger |
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Description: Simulations over AWGN and Rayleigh channels, at various signal-to-noise ratios, verify the excellent performance of this novel APEL-turbo scheme. Performance comparisons were carried out between turbo coded APEL, JPEG, and BMP image files.
To provide a fair comparison between the APEL and JPEG images, compression level had to be the same. This resulted in the data reduction for both APEL and JPEG to be around 5 to 1.
In the assessment of bit errors within a received image file, a quantitative pixel error rate offers a fairer comparison. Therefore, it is appropriate to represent the error performance in a ratio called “Pixel Error Rate (PER)”, which is a measure of the degree of image degradation.
Through the analysis of the ith received pixel’s variance from its transmitted value, a measure of visual disturbance, Δi, can be quantified as in (1), where ti and ri represent the transmitted and received pixel colours respectively, for an n colour image.
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Size: 386048 |
Author: A.H.M Shahparan |
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Description: 发送方用自己的私钥加密通讯内容生成发送方的数字签名，并将其发送给接受方；接受方利用发送方的公钥对该签名内容进行验证；
思考：
（1）这种方式是否存在安全问题？
（2）请分别选择文件test-1.txt和test_pig.bmp作为通讯内容，分别记录全过程用时，并对比一下；-Sender s private key encrypted communications with their own content generated digital signature the sender, and send it to the receiving party the receiving party using the sender s public key to verify the contents of the signature
Consideration:
(1) whether there are security issues in this way?
(2) Please select the file test-1.txt respectively and test_pig.bmp as communications content, the whole process were recorded with a time and compare
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Size: 93184 |
Author: 熊龙生 |
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Description: 完成基于公钥证书的非对称密钥分配工作
说明：
（1）作为通讯的双方A和B，都有一个共同信赖的第三方CA，由CA为每个人生成公钥证书和相应的私钥并分发给A、B。
（2）A和B分别将自己的公钥证书提供给对方后，分别在本地验证对方公钥证书是否可靠（假定A、B已经获得CA的公钥），然后A用B的公钥加密一个数据X（整型，可自己定义，比如100）并发送给B，B用自己的私钥解密后得到数据X，然后按协商好的函数F（比如F(X)=2*X）计算得到F(X)，再利用A的公钥加密后发送给A；A在本地用自己的私钥解密后得到F(x)，在同本地计算得到的F(X)进行对比，如果一致，说明公钥分配成功。
（3）A用B的公钥对一图象文件（test_pig.bmp)进行加密并发送给B，B收到后解密，对比原图象看是否一致，并记录整个加密/解密的所用时间T1；-Complete the asymmetric public key certificate-based key distribution work
Description:
(1) as the communication of both A and B, have a common trusted third party CA, the CA generates a public key certificate for each person and the corresponding private key and distributed to A, B.
(2) A and B respectively to provide their own public key certificates to each other both in the local verify the reliability of each other s public key certificate (assuming A, B has received CA s public key), then A with B s public key encryption 1 the data X (integer, can be their own definition, such as 100) and send it to B, B with their own private key decrypted by the data X, and then consult a good function by F (eg F (X) = 2* X) calculated F (X), then encrypted using A s public key sent to A A locally with their own private key to decrypt obtained F (x), calculated with the local F (X) are compared, if the same description Successful public-key distribution.
(3) A with B s public key on an
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Size: 71680 |
Author: 熊龙生 |
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Description: 实现了bmp图像文件的读写操作，并验证了图像二次插值的缩放算法-Bmp image file implements read and write, and verify that the image scaling algorithm for quadratic interpolation
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Size: 329728 |
Author: libra |
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Description: 1、处理系统具备人机交互的界面；
2、处理系统能实现对常见图像文件（bmp、 jpg、 tiff、 gif等）进行打开、保存、另存、打印和退出等功能操作；
3、主题处理的中间结果都要能查看和保存；
4、提供至少4类的图像（偏暗的、偏亮的、带噪声的和正常良好情况的图像）验证处理程序的效果。
5、一份处理系统的说明文档，说明文档包括选题的缘由、系统运行的平台要求和配置、系统的操作说明、系统实现的步骤和对应算法的详细解释（最好要有中间结果和最终结果的截图）、总结（包括程序实现过程中遇到的困难和解决的办法、分析所设计的算法在4类图像上应用的优劣等）。
6、对使用到的关键函数进行详细说明。
-Processing system with human-computer interaction interface processing system to achieve the common image file (bmp, jpg, tiff, gif, etc.) Open, Save, Save, Print, and Exit function operation theme processing the intermediate results must be able to view and save 4, provided at least four types of images (dim, partial bright image with noise and normal good situation) to verify the effect of the handler. 5, a processing system documentation, documentation, including the topics of the reason, the platform requirements and configuration of the system is running, the instructions of the system, the system detailed explanation of the steps and the corresponding algorithm (better to have intermediate results and final screenshot of the results), summary (including the difficulties encountered in the program implementation process and solution analysis of the merits of the application by the design of the algorithms in the four categories of images). 6, using the key function to be descri
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Size: 1376256 |
Author: |
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Description: 验证码识别,识别BMP图片，JSP图片，成功率高，基本上一般的图片还是能有99 的成功-verifycode finish,may verify bmp、jsp
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Size: 588800 |
Author: wenc |
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