[图形图像处理] DCT,DWT,DFT,LSB数字水印MATLAB+GUI界面
本课题为基于MATLAB的小波变换dwt和离散余弦dct的多方法对比数字水印系统。带GUI交互界面。有一个主界面GUI，可以调用dwt方法的子界面和dct方法的子界面。流程包括，读取宿主图像和水印图像，嵌入，多种方法的攻击（剪切，加噪，旋转等），提取，最后利用psnr峰值信噪比进行评价不同攻击下，鲁棒性的好坏。
This project is based on MATLAB wavelet transform DWT and discrete cosine DCT multi method contrast digital watermarking system. With GUI interactive interface. There is a main interface GUI, which can call the sub interfaces of DWT method and DCT method. The process includes: reading host image and watermark image, embedding, attacks of various methods (cutting, adding noise, rotation, etc.), extracting. Finally, PSNR peak signal-to-noise ratio is used to evaluate the robustness of different attacks. (2020-08-07, matlab, 9766KB, 下载27次)
[图形图像处理] 12
IKONOS数据在土地利用动态监测中的应用方法研究
对高分辨率(1m)的多光谱IKONOS影像在土地利用变化动态 监测中的应用方法进行了研究试验.通过对结果的分析和与其他常规方法结果的对比分析,提出了将多光谱IKONOS影像和全色SPOT影像叠加作主分量变 换,然后选取适宜的特征分量进行假彩色合成的方法,来生成光谱特征变异影像以突出变化信息.该组合方法不仅能保持原有影像的丰富信息,而且可突出变化信 息,充分展示了IKONOS影像的巨大应用潜力.
Study on IKONOS data in Land Use Dynamic Monitoring Method for high-resolution (1m) multi-spectral IKONOS Images in Land Use Change Dynamic Monitoring test methods were studied by analysis of the results and with the results of other conventional methods comparative analysis, the multispectral IKONOS image and panchromatic SPOT image superimposed primary component conversion, and then the appropriate feature component of false color composite methods to generate images to highlight the variation in spectral characteristics change information. this combination not only You can maintain the original image of the wealth of information, but also to highlight changes and information, demonstrating the enormous potential IKONOS images. (2017-03-05, PDF, 156KB, 下载1次)
[图形图像处理] 7
基于最大累积剩余熵的红外图像分割
经典阈值化分割方法是常用的图像分割方法之一,但对于低对比度,低信噪比的红外图像分割效果 不理想,将累积剩余熵运用于红外图像分割,即寻求使得累积剩余熵最大的灰度值作为分割阈值,实验结果表明：基于最大累积剩余熵的图像分割方法是一种有效的 红外图像分割方法,比起经典的阈值分割方法,分割红外图像的效果要好
Segmentation based on maximum cumulative residual entropy classic infrared image thresholding method is one of the commonly used image segmentation method, but for low-contrast, low SNR infrared image segmentation is not satisfactory, the cumulative residual entropy applied to infrared image segmentation, that makes the search for the maximum cumulative residual entropy of gray values as a threshold value segmentation experimental results show that: image segmentation based on maximum cumulative residual entropy method is an effective infrared image segmentation method, compared to the classical threshold segmentation method, infrared image segmentation better than (2017-03-05, PDF, 585KB, 下载1次)
[图形图像处理] Noise-reduct-ion-of-Chaotic-Signal
基于小波多分辨率分析的思想，提出一种降低混沌信号噪声的方法。首先对一个混沌时间序列进行小波分析，得到信
号在各个尺度上的不同特性 再对各个高频细节信号进行二次小波去噪 最后对二次小波去噪后的信号进行线性叠加，达到
提取真实信号的目的。分别对Rossler 系统产生的混沌序列和黄河年径流量混沌序列进行了仿真研究，结果表明了该方法的
有效性。
A method was proposed to reduce noise within chaotic signal based on mulrti-resolution wavelet transform.
Based on the wavelet analysis ，different characters of chaotic signal were observed on different scales.
Then ,each detail with high frequencies was denoised by wavelet for the second time in order to observe the real
signal. Chaotic time series generated by Rossler systemand the practically observed yearly runoff of Yellow River
were respect ively applied for noise reduct ion. Simulat ion results show that this method is feasible to noisy chaot ic
signal. (2017-01-19, matlab, 279KB, 下载5次)
[图形图像处理] Image_processing_quality_evluation
图像处理（图像融合，图像加密等）的性能评价指标集包括：平均梯度，边缘强度，信息熵，灰度均值，标准差(均方差MSE)，均方根误差，峰值信噪比（psnr），空间频率(sf)，图像清晰度，互信息(mi)，结构相似性(ssim)，交叉熵(cross entropy)，相对标准差。
Image processing，average gradient, edge strength, information entropy, gray mean, standard deviation (variance (MSE), are root mean square error, peak signal to noise ratio (PSNR), spatial frequency (SF), the sharpness of the image, the mutual information (MI), similar to the structure of (SSIM) and cross entropy (cross entropy). The relative standard deviation (2016-07-12, matlab, 8KB, 下载75次)
[图形图像处理] PlagiarismAR
增强现实(AUGMENTEDREALITY,AR)技术是在真实的视频图像中叠加虚拟物体,并通过跟踪与注册技术,使用户可以与其进行良好互动的一种技术。随着人们对其研究的不断深入,增强现实技术已经开始应用在生活娱乐、医学、军事与工业生产等众多领域。虚实注册技术是增强现实的核心技术之一,它实时地计算观察者的位置和方向,然后确定虚拟物体在二维图像上的投影位置,最后将虚拟物体实时地叠加到该位置之上,使得虚拟场景能够与真实世界无缝融合。随着计算机视觉技术和计算机图形学的快速发展,基于视觉的虚实注册方法以其设备简单、成本较低及注册精度高等优点
Augmented Reality (AUGMENTEDREALITY, AR) technology is superimposed virtual objects in real video image, and through tracking and registration technology that allows users to interact with their good conduct of a technology. With the deepening of its research, augmented reality technology has been used in many areas began to live entertainment, medical, military and industrial production. Actual situation registered technology is to enhance the reality of one core technology, which calculate in real time the position and direction of the observer, and then determine the two-dimensional image projected location of the virtual object, and finally the virtual object superimposed onto the real-time position so virtual and the real world scene can seamless integration. With the rapid development of computer vision and computer graphics, vision-based registration method and the reality of its equipment is simple, low cost and high precision registration (2016-07-08, Others, 8996KB, 下载5次)
[图形图像处理] LEARNING--ABAP
SAP进入中国已经有些年头,在近年,实施SAP的公司越来越多,尽管SAP本身提供了相当强大的可配置功能,但是由于企业复杂的业务背景,特别是对各种报表的需求,依旧免不了二次开发.
长期以来,特别是受各种媒体和某些机构不正确的宣传,大家对SAP心存诸多疑虑, 编写本套丛书的目的就是在于解除大家的疑虑,揭开SAP神秘的棉纱
SAP has been in China for some years, in recent years, the implementation of SAP companies more and more, although the SAP itself provides a very powerful configuration, but because of the complex business background, especially for a variety of reports, is still not free of the two development.
For a long time, in particular, by various media and some organizations are not the right publicity, we have a lot of doubts about the SAP, the purpose of writing this book is to lift everyone s concerns, the mystery of cotton yarn SAP (2015-08-06, DOS, 1137KB, 下载1次)
[图形图像处理] reli-gongsi--kaifa-xuqiushuo
国家发改委建立能耗在线监测平台，要求各用能单位设立独立服务器上报每日能耗数据。XX热力总公司下属9家供应站每日消耗能源需由各家负责人根据要求填报，每日由XX热力总公司汇总后统一上报到监测服务器上传到国家发改委平台。在此背景下，热力总公司委托我们在建设企业监测平台时提供一套填报汇总系统。具体需求见以下描述
National Development and Reform Commission to establish energy-line monitoring platform, requiring the establishment of an independent server using units reported daily energy consumption data. XX heat supply station Corporation under nine daily energy consumption to be based on requirements for filing by each person in charge, after the summary by XX unified thermodynamic Corporation reported daily to the monitoring server platform uploaded to the NDRC. In this context, we provide a thermal head delegate summary reporting system in the building of enterprise monitoring platform. See the following description of specific needs (2015-01-03, Java, 16KB, 下载9次)
[图形图像处理] shipinyinxie
信息安全是涉及国家安全、企业安全、人民生命安全的重要问题，也是是发展信息产业的基础和国家信息化进程。多媒体安全作为信息安全的一个重要组成部分越来越受到重视。信息隐藏技术是一种重要的多媒体内容安全，其中的隐写自本世纪初开始得到了繁荣的发展。本文对网络传输中最常见的图像—JPEG图像中的隐写进行了研究和实现。
Information security is an important issue related to national security, corporate security and safety of the people, but also is the basis and the process of national development of the information industry. Multimedia Security information security is an important part of getting attention. Information hiding is an important multimedia content security, which steganography since beginning of this century has been the development and prosperity. In this paper, the network transmission is the most common image-JPEG image steganography studied and realized. (2014-04-23, Visual C++, 5275KB, 下载12次)
[图形图像处理] 9
针对传统的空间域纹理图像修复算法计算量大、修复时间长的缺点, 本文提出了一种纹理图像的快速修复算法。该算
法的基本思想是在小波域中利用小波系数的能量来确定待修复块的填充顺序, 并结合纹理合成的方法填充待修复区。实验结
果表明, 该算法不仅可以大大提高纹理图像的修复速度, 而且在峰值信噪比和主观视觉效果上都优于传统的图像修复算
Trad itional spatia-l doma in inpainting algorithm s for tex ture image need comp licated computat ion and consume
a long t ime. A fast inpainting algorithm for tex ture image is proposed by determ in ing the order o f the filling
blocks using the energ ies o f w avelet coeffic ients in w ave let dom ain, and filling the inpa in ting b locks using tex ture
synthesis method. Experimental resu lts show that the a lgorithm not on ly improves inpainting speed g reat ly, but a lso
achieves better peak signa l no ise rat io ( PSNR ) and higher v isual qua lity.
(2014-03-22, matlab, 791KB, 下载21次)
[图形图像处理] feixiangganjilei
针对宽带高分辨雷达体制下的未知速度运动目标检测问题, 基于高分辨一维距离像提出一种新的非相干积累算法. 首先利用改进的双向维特比算法估计目标速度及强散射点位置, 提高了低信噪比下
的估计精度, 然后在强散射点周围选取待检测单元进行非相干积累, 进一步提升了检测性能. 两类飞机实测数据的多个实验结果表明, 当目标发生距离走动的情况下, 该算法性能相对传统的非相干积累算法有明显的提高.
For unknown broadband speed moving target detection problem under high resolution radar system, based on high resolution range profile propose a new non-coherent integration algorithm. Firstly, improved bidirectional Viterbi algorithm to estimate the target speed and strong scattering point, raise the estimation accuracy of multiple experiments under low SNR, then select points around the strong scattering detection unit to be non-coherent integration, to further enhance the detection performance. measured data show two types of aircraft, when the target occurrence walking distance Next, the algorithm performance compared to traditional non-coherent integration algorithm has been significantly improve (2013-12-30, PDF, 425KB, 下载18次)
[图形图像处理] 87
小波分析可同时从时域和频域两个方面对信号进行分析，结合包络分析十分适合滚动轴承的故障特征提取；基于双通道的全矢小波分析方法不仅对单通道小波分析方法具有兼容性，而且弥补了传统的基于单通道信
息进行旋转机械故障特征提取造成的信息量不完整、易导致误诊的弊端。结果表明，在针对滚动轴承外圈故障特征提取时，全矢小波分析方法较小波一包络分析方法具有一定的优势。
Wavelet analysis simultaneously from the time domain and frequency domain analysis of two aspects of the signal, combined envelope analysis is very suitable for roller bearing fault feature extraction based on a dual-channel full vector wavelet analysis method is not only right channel wavelet analysis method has compatibility, And make up the traditional channel-based information extraction rotating machinery fault caused by the amount of information is not complete, easily lead to misdiagnosis of the state. The results show that for the outer bearing fault feature extraction, wavelet analysis method full vector wave a smaller envelope analysis method has certain advantages. (2013-08-15, PDF, 176KB, 下载9次)
[图形图像处理] noise
图像去噪理论基础图像视频去噪的最终目的是改善给定的图像，解决实际图像由于噪声干扰而导致图像质量下降的问题。通过去噪技术可以有效地提高图像质量，增大信噪比，更好的体现原来图像所携带的信息，作为一种重要的预处理手段，人们对图像去噪算法进行了广泛的研究。在现有的去噪算法中，有的去噪算法在低维信号图像处理中取得较好的效果，却不适用于高维信号图像处理；或者去噪效果较好，却丢失部分图像边缘信息，或者致力于研究检测图像边缘信息，保留图像细节。
Image denoising theory based image video denoising s ultimate aim is to improve a given image, to solve practical image due to noise interference of the decline of the image quality. By denoising technology can effectively improve the image quality, increase the signal-to-noise ratio, better reflect the information carried by the original image, as a kind of important means of pretreatment, the image denoising algorithm is extensively studied. In the existing denoising algorithms, some of the denoising algorithm in low visa obtained better effect in image processing, but it does not apply to higher dimensional signal image processing Or better denoising effect, but loss of part of the image edge information, or devoted to detect image edge information, keep image details.
(2013-06-15, PDF, 186KB, 下载9次)
[图形图像处理] 22
基于数学形态学实现振动信号降噪。研究了数学形态滤波器对振动信号在不同类型、不同强度噪声干扰下
的降噪能力，提出了采用开一闭和闭一开组合数学形态滤波器实现旋转机械振动信号降噪处理的方法。通过仿真
计算及实例，检验了形态滤波器的滤波效果，表明数学形态滤波器可以有效剔除脉冲、降低随机噪声干扰，提高
振动信号的信噪比。
The vibration signal noise reduction based on mathematical morphology. Mathematical morphology filter vibration signals in different types, different intensity noise, noise reduction capabilities, proposes using open-closing and close the opening combination of mathematical morphology filter rotating machinery vibration signal noise reduction processing. Simulation and examples, test the morphological filters filtering effect, indicating that the mathematical morphological filter can effectively excluded the pulse, to reduce random noise and improve the signal-to-noise ratio of the vibration signal. (2012-09-24, PDF, 359KB, 下载99次)
[图形图像处理] 08kz1241
实现了物光和参考光双加密的数字全息加密方法,并从理论模拟和实验上分别验证了该方案,其安全性远高于仅加密一束光时的情况.使用双随机相位加密法加密了原始图像,并使用随机相位片编码了参考光. 加密后的图像由 CCD 接收后再使用计算机处
理.在实验上检测了该系统的信噪比和容错性, 并计算得到系统的密钥长度高达6.3×1014
.
Object and reference light to achieve a double-encrypted digital holographic encryption method, and from theoretical modeling and experimental validation of the program, respectively, its safety is much higher than the case when a beam of light is only encrypted using double random phase encryption encryption the original image, and use the random phase encoded reference beam slice. encrypted and then received by the CCD image processing using a computer in the experiments on the detection signal to noise ratio of the system and fault tolerance, and calculated the length of the key system up to 6.3 × 1014. (2011-10-25, Others, 942KB, 下载36次)
[图形图像处理] lisanxiaoboyuzhidepianweifenquzao
小波方法和偏微分方程方法是图像去噪中的主要方法。该文提出基于离散小波变换对图像进行阈值去噪，得出了小波阈值的偏微
分方程表示形式，在此基础上研究偏微分方程的解法，采用分数步的小波阈值方法对图像去噪，得到了较好的去噪效果，同时可以保护边
缘。数值试验结果表明，该方法具有比小波方法更好的去噪效果，能获得较高的信噪比
Wavelet method and partial differential equations is the main method of image denoising. In this paper, based on discrete wavelet transform image threshold denoising, wavelet threshold obtained indicated that the form of partial differential equations, in this study based on the solution of partial differential equations, using fractional steps of wavelet thresholding methods for image to noise, have been well de-noising effect at the same time can protect the edge. Numerical experimental results show that the method is better than the wavelet method for denoising results are able to obtain a higher signal to noise ratio (2010-01-16, Visual C++, 1275KB, 下载64次)
[图形图像处理] tuxiangqukuang
分块有损压缩图像忽略了块间相关性，重构时会产生块效应，该文提出一种空域自适应去块效应算法。对块边缘采用方向自适应
有理滤波，以弱化块效应。根据块的内部活动性将图像块分成平坦块和纹理块2 类，利用基于方差的空域检测方法检测出平坦块，并对平
坦块进行邻块边缘自适应平滑。实验结果表明，该算法有效去除了块效应，一定程度上提高了信噪比，算法简单且鲁棒性较好。
Block lossy compression image ignores the inter-block correlation, Reconstruction would have a blocking effect, the paper presents a airspace Adaptive Deblocking Algorithm. To block the edge of rational use of the direction of adaptive filtering, in order to weaken the block effect. According to block the internal activity of the image block is divided into a flat block and texture block 2 categories, the use of airspace based on the variance detection methods to detect the flat block, and a flat block adjacent block edge adaptive smoothing. Experimental results show that the algorithm effectively blocking go except, to some extent, improve the signal to noise ratio, the algorithm is simple and better robustness. (2009-03-03, Visual C++, 144KB, 下载97次)
[图形图像处理] VTKexample
这是研究vtk开发的最好的参考资料。
这是叶峰无偿提供的宝贵的学习财富，叶峰同志为中国的VTK研究事业和C3P论坛的发展作出巨大贡献，
国内的VTK研究源头从C3P开始传播到各个学校、研究所、企业，同时也从C3P走出一大批VTK&C3P的优秀人才。
非常感谢叶峰的努力和分享，希望大家向他学习。
欢迎关注叶峰的个人空间和C3P论坛。
http://www.cadcaecam.com/Home/space.php?uid=7390
http://www.cadcaecam.com/Forum
VTK development of this research are the best reference. This is provided free of charge Feng Ye valuable study wealth, Ye Feng Chinese VTK Comrade research C3P Forum and make a significant contribution to the development of domestic research at the source of VTK from C3P begun to spread to various schools, research institutes, enterprises, but also C3P out from a large number of VTK & C3P talents. Feng Ye very grateful for the efforts and sharing, hope everyone to learn from him. Welcomed the attention to personal space and Feng Ye C3P Forum. http://www.cadcaecam.com/Home/space.php?uid=7390 http://www.cadcaecam.com/Forum (2009-02-15, Visual C++, 339KB, 下载39次)
[图形图像处理] Watermark_4
信息隐藏与水印技术系列实验之四：DWT变换域不可见图像水印算法（开发工具：vc2005）：
实现在一个256色灰度载体图像的DWT变换域低频LL系数中多次重复嵌入一个256色灰度文本图像水印。其主要功能如下：
（1）可以载入不同的载体图像和水印图像，但载体图像和水印图像在本软件中被限制为256色灰度图像，若要用其它图像甚至彩色图像，请修改源码。
（2）可以对含水印图像中的水印信息进行提取，提取时需要原始图像。
（3）剪切攻击可使含水印图像中的水印信息部分丢失。
（4）可以计算峰值信噪比（PSNR）和互相关系数（NC），以对含水印图像及提取水印进行客观质量评价。
（5）源码结构清晰，在其基础上可快速开发出自己的水印软件。
err (2008-12-20, Visual C++, 3758KB, 下载183次)
[图形图像处理] Watermark_2
信息隐藏与水印技术系列实验之二：空域不可见LSB图像水印算法（开发工具：vc2005）：
实现在一个256色灰度载体图像的LSB中嵌入一个二值（用256色模拟）灰度文本图像水印。其主要功能如下：
（1）可以载入不同的载体图像和水印图像，但载体图像和水印图像在本软件中被限制为256色灰度图像，若要用其它图像甚至彩色图像，请修改源码。
（2）可以对含水印图像中的水印信息进行提取，提取时不需要原始图像。
（3）LSB攻击可使含水印图像中的水印信息丢失。
（4）可以计算峰值信噪比（PSNR）和互相关系数（NC），以对含水印图像及提取水印进行客观质量评价。
（5）源码结构清晰，在其基础上可快速开发出自己的水印软件。
err (2008-12-20, Visual C++, 1036KB, 下载243次)