m序列和Gold序列特性研究

莱斯大学关于压缩感知的一些代码，供大家参考

SIFT算法特点• SIFT特征是图像的局部特征，其对旋转、尺度缩放、亮度变化保持不变性，对视角变化、仿射变换、噪声也保持一定程度的稳定性。• 独特性(Distinctiveness)好，信息量丰富，适用于在海量特征数据库中进行快速、准确的匹配。• 多量性，即使少数的几个物体也可以产生大量SIFT特征向量。• 经过优化的SIFT算法可满足一定的速度需求。• 可扩展性，可以很方便的与其他形式的特征向量进行联合。SIFT简介SIFTScale Invariant Feature Transform传统的特征提取方法成像匹配的核心问题是将同一目标在不同时间、不同分辨率、不同光照、不同位姿情况下所成的像相对应。传统的匹配算法往往是直接提取角点或边缘,对环境的适应能力较差,急需提出一种鲁棒性强、能够适应不同光照、不同位姿等情况下能够有效识别目标的方法。己0]/3/己7彐SIFT简介SIFTScale Invariant Feature TransformSIFT提出的目的和意义分1999年 British columbia大学大卫.劳伊( David g.Lowe)教授总结了现有的基于不变量技术的特征检测方法,并正式提出了一种基于尺度空间的、对图像缩放、旋转甚至仿射变换保持不变性的图像局部特征描述算子一SIFT(尺度不变特征变换),这种算法在2004年被加以完善己0]/3/己7SIFT简介SIFTScale Invariant Feature Transform将一幅图像映射(变换)为一个局部特征向量集;特征向量具有平移、缩放、旋转不变性,同时对光照变化、仿射及投影变换也有一定不变性。己0]/3/己7SIFT简介SIFTScale Invariant Feature TransformSIFT算法特点SIFT特征是图像的局部特征,其对旋转、尺度缩放、亮度变化保持不变性,对视角变化、仿射变换、噪声也保持一定程度的稳定性。独特性( Distinctiveness)好,信息量丰富,适用于在海量特征数据库中进行快速、准确的匹配。多量性,即使少数的几个物体也可以产生大量SIFT特征向量。经过优化的SIFT算法可满足一定的速度需求。可扩展性,可以很方便的与其他形式的特征向量进行联合。己0]/3/己7SIFT简介SIFTScale Invariant Feature TransformSIFT算法可以解决的问题目标的自身状态、场景所处的环境和成像器材的成像特性等因素影响图像配准/目标识别跟踪的性能。而SIFT算法在一定程度上可解决:目标的旋转、缩放、平移(RsT)图像仿射/投影变换(视点 viewpoint)光照影响(111 amination)目标遮挡( occlusion)杂物场景(c1 utter)噪声己0]/3/己7SIFT算法实现细节SIFTScale Invariant Feature TransformSIFT算法实现步骤简述SIFT算法的实质可以归为在不同尺度空间上查找特征点(关键点)的问题。原图像特征点特征点目标的特检测描述征点集特征点匹匹配点矫配正目标图像特征点特征点目标的特检测描述征点集SIFT算法实现物体识别主要有三大工序,1、提取关键点;2、对关键点附加详细的信息(局部特征)也就是所谓的描述器;3、通过两方特征点(附带上特征向量的关键点)的两两比较找出相互匹配的若干对特征点,也就建立了景物间的对应关系。SIFT算法实现细节SIFTScale Invariant Feature TransformSIFT算法实现步骤关键点检测己。关键点描述彐·关键点匹配4·消除错配点己0]/3/己7关键点检测的相关概念SFTiant Feature Transfor1.哪些点是SIFT中要查找的关键点(特征点)?这些点是一些十分突出的点不会因光照条件的改变而消失,比如角点边缘点、暗区域的亮点以及亮区域的暗点,既然两幅图像中有相同的景物,那么使用某种方法分别提取各自的稳定点,这些点之间会有相互对应的匹配点。所谓关键点,就是在不同尺度空间的图像下检测出的具有方向信息的局部极值点。根据归纳,我们可以看出特征点具有的三个特征:尺度方向大小己0]/3/己7

经典小波教材，适合初学者， 也可作为研究参考，讲解深入浅出，从基础到应用都有所涉及。这是高清版本的，方便阅读

北京54，西安80，WGS等，3度，6度带转换

设计目的及任务： 1、掌握利用A/D转换和计算机资源实现示波器的设计方法。2、设计虚拟示波器。3、建立NI-DAQmx仿真设备，选择E系列中的NI PCI-6071E数据采集卡的仿真模块，通过DAQmx物理通道识别，产生模拟信号，然后基于LabVIEW开发平台设计实现虚拟示波器。基本可以实现仪器的性能与可靠性，可以方便的对其编程, 实现对数据的采集、实时显示、数字滤波、截波显示、波形存储、波形回显、频谱分析等多种功能。

FANUC数控系统的FOCAS开发包Linux与arm的专用版本，可用来二次开发验证可用，大家放心下载

eWebEditor编辑器ASP版-支持IE、火狐及360浏览器真正可用版，上传图片没压力。不同于其它的所谓破解版的版本

基于图像处理的象棋棋盘识别是象棋机器人软件的重要组成部分,其核心工作是棋盘图像二值化和棋子识别。针对棋盘全局二值化存在的问题,提出了基于相邻像素灰度差阈值的棋盘图像二值化方法;针对棋子文字方向任意的现象, 运用象棋文字的识别作为颜色识别异常的补充。实验结果表明,该方法提高了棋盘识别的效率。

讲述了IIR数字滤波器的verilog实现过程

GNSS-SDR is an open-source GNSS software receiver freely available to the research community. This project provides a common framework for GNSS signal processing which can operate in a variety of computer platforms. This tool is intended to foster collaboration, increase awareness, and reduce develoContentsMain Page1.1 Contents1.2 Overview1.3 Building GNSS- SDR2351.3.1 Debug and release builds1.3.2 Updating GNSS-SDR1.4 Using GNSS-SDR51.5 Control plane1.5.1 Configuration61.5.2 GNSS block factory1.6 Signal Processing plane1.6.1 Signal Source1.6.2 Signal Conditioner1.6.3 Channel1.6.3.1 Acquisition1.6.3.2 Tracking101.6.3.3 Decoding of the navigation message11.6.4 Observables121.6.5 Computation of Position, velocity and Time121.7 About the software license1.8 Publications and Credits131.9 Ok. now what?14CONTENTS2 Reference Documents152.1 Interface Control Documents152.1.1GPs2.1.2 GLONASS152.1.3Gai152.1.4 beiD2.1.5 Satellite Based Augmentation Systems(SBAS)2.2 Other Standards2.2.1R|NEX172.2.2 NMEA22.3KML.2.2.4 C++ Standards182.2.5 Positioning protocols in wireless communication networks183 Signal model193. 1 GNSS signal model1.1 Global Positioning System(GPS)signal in space3.1.2 GLONASS signal in space3.1.3 Galileo signal in space223.1.4 Reference254 Todo list5 Hierarchical Index5.1 Class Hierarchy6 Class Index336.1 Class list7 File Index7.1 File list43CONTENTS8 Class docu8. 1 AcquisitionInterface Class Reference538.1.1 Detailed Description8.2 ArraySignal Conditioner Class Reference8.2.1 Detailed Dtio558.2.2 Constructor& Destructor Documentation8.2.2. 1 Array SignalConditioner(Configurrface configuration, std: shared_ptr data type_adapt, std: shared_ptr< GNSSBlockInterfaceil, std: shared ptr< GNSSBlockInterface > res, std: string role, std: stringimplementation)558. 2.2.2 Array SignalConditioner(558.2.3 Member Function Documentation8.2.3. 1 implementation(558.3 beamformer Class Reference568.3. 1 Detailed Description8. 4 Beamformer Filter Class Reference568.4.1 Detailed description578.4.2 Member Function Documentation8. 4.2.1 implementation()8.5 byte x2 to complex byte Class Reference8.5.1 Detailed Description588.6 Byte ToShort Class Reference588.6. 1 Detailed description8.6.2 Member Function Documentation8.6.2. 1 implementation(598.7 Channel Class Reference598.7.1 Detailed description608.7.2 Constructor Destructor Documentation8.7. 2.1 Channel(ConfigurationInterface *configuration, unsigned int channel, std+shared_ptr< GNSSBlockInterface> pass through, std: shared_ptr acq, std: shared_ptr nav, std string role, std stringimplementation, boost: shared ptr< gr: msg_queue queuegenerated by DoxygenCONTENTS8.7.2.2 Channelo8.7.3 Member Function Documentation8.7.3. 1 implementation(618.7.3.2 set signal(const Gnss Signal &gnss signal8.7.3. 3 start_ acquisition(68.8 channel msg receiver cc Class Reference8.8.1 Detailed Description628.8.2 Constructor Destructor Documentation628.8.2. 1 channel_msg_ receiver_ cco8.9 ChannelFsm class Reference8.9.1 Detailed Description638.10 ChannelInterface Class Reference638.10.1 Detailed Description8.11 cl_ fft_ plan Struct Reference648.11.1 Detailed Description648.12 clFFT Complex Struct Reference648. 12. 1 Detailed Description8. 13 ClFFT Dim 3 Struct Reference8. 13.1 Detailed description658.14 ClFFT_ SplitComplex Struct Reference658. 14.1 Detailed Description658. 15 complex byte to float x2 Class Reference8. 15.1 Detailed description8. 16 complex_ float_to _ complex_ byte Class Reference668.16.1 Detailed Description668. 17 concurrent map< Data> Class Template Reference8.17.1 Detailed description8.18 concurrent_ queue< Data > Class Template Reference8.18.1 Detailed description688.19 ConfigurationInterface Class ReferenceCONTENTS8.19. 1 Detailed Description8.20 ControlMessage Class Reterence698. 20. 1 Detailed Description8.21 ControlMessage Struct Reference698.21. 1 Detailed Description8.22 ControlMessageFactory Class Reference708.22. 1 Detailed Description8. 22.2 Constructor Destructor Documentation8. 22.2. 1 ControlMessage Factory8. 22.2.2 ControlMessage(8.23 Control Thread class Reference8. 23. 1 Detailed Description718.23.2 Constructor Destructor Documentation8.23. 2.1 ControlThreado8. 23.2.2 Control Thread(std: shared_ptr< ContigurationIntertace> configuration)8.23. 2.3 Control Thread(728.23. 3 Member Function Documentation8.23.3. 1 flowgraph7282332run()728.23.3.3 set_control_ queue(boost: shared _ptr< gr: msg_queue control queue)8. 24 cpu multicorrelator Class Reference8.24. 1 Detailed Description8.25 cpu multicorrelator 1 6sc Class Reference8.25. 1 Detailed Description748.26 cshort to float x2 Class Reference748. 26. 1 Detailed Description8.27 cuda multicorrelator Class Reference8.27.1 Detailed Description758.28 direct resampler conditioner cb class Reference758.28. 1 Detailed Descriptiongenerated by DoxygenCONTENTS8.29 direct resampler conditioner cc Class Reference8.29. 1 Detailed description768.30 direct resampler conditioner cs Class Reference8.30. 1 Detailed description8.31 DirectResampler Conditioner Class Reference8.31. 1 Detailed Description788.31.2 Member Function Documentation788.31.2.1 implementation788.32 Fast Correction Struct Reference8. 32 1 Detailed Description8.33 File Configuration Class Reference8.33. 1 Detailed Description798.33.2 Constructor destructor documentation8.33.2. 1 File Configuration(8. 34 File SignalSource Class Reference808.34.1 Detailed Description808.34.2 Member Function Documentation8.34.2.1 implementation(8.35 Fir Filter Class Reference8.35. 1 Detailed Description818.35.2 Constructor Destructor Documentation8.35.2. 1 Fir Filter( ConfigurationInterface *configuration, std: string role, unsigned intreams, unsigned int out_streams)8.35. 2.2 FirFiltero8.35. 3 Member Function Documentation8.35.3. 1 implementation(828.36 FlexibandsignalSource Class Reference828.36. 1 Detailed descripti838.36.2 Member Function Documentatio8.36.2.1 implementation(8. 37 FreqXlating FirFilter Class ReferenceCONTENTSX8.37.1 Detailed Description8.37.2 Member Function Documentation848.37. 2.1 implementation(848.38 FrontEndCal Class Reference848. 38. 1 Detailed description8.38.2 Member function documentation8.38. 2.1 estimate_doppler_ from_ _eph(unsigned int PRN, double toW, double lat, doublelon, double height)8.3822 get ephemeris(),.,.,,.,,,,,,,858.38.2.3 GPS L1 front end model E4000(double f bb true Hz, double f bb_measHz, double fs nominal_ hz, double *estimated_fs_ hz, double *estimated_f if Hz, 85double *tosc_err_ppm)8.38.2.4 set_configuration(std shared_ptr< ConfigurationInterface configuration)858. 39 Galileo Almanac class Reference858.39. 1 Detailed description8. 39.2 Constructor destructor documentation8.39.2.1 Galileo_ Almanac8.40 galileo e1 dl pll veml tracking cc Class Reference8.40. 1 Detailed Descriptio88ember Function Documentation8.40.2.1 general work(int output_ items, gr_ vector_int &ninput_ items. gr vector_constvoid_star &input_items, gr_ vector_ void_ star &output_ _items)8. 41 galileo_e1_ Is_pvt Class Referenc8.41. 1 Detailed Descriptio8. 41.2 Member data documentation8. 41.2.1 d channels898.41. 2.2 galileo_ ephemeris_ map898.42 galileo e1 observables cc Class Reference8.42. 1 Detailed Description8. 43 galileo_e1_pvt_cc Class Reference8.43. 1 Detailed description8. 43.2 Constructor Destructor documentatiCONTENTS8. 43.2.1 galileo_e1_pvt_cc918. 43.3 Member Function documentation8. 3.1 general_work(int output_items, gr vector_int &ninput_items. gr_ vector_constevoid star &input items, gr vector void star &output items)918. 44 Galileo_E1_ Tcp Connector_ Tracking_cc Class Reference8.44.1 Detailed Description8. 45 galileo e1b telemetry decoder cc Class Reference928.45. 1 Detailed description938. 45.2 Member Function Documentation8.45.2. 1 forecast(int noutput_items, gr_ vector_ int &input_items_required8.45. 2.2 general_ work(int output_items, gr- vector_ int &ninput_items. gr_ vector_const+void star &input_items, gr_ vector_ void_ star &output_ items938. 45.2.3 set_channel(int channel8.45.2. 4 set_ decimation(int decimation)8. 45. 2.5 set_ satellite(Gnss_ Satellite satellite)8.46 Galileo E5a Dl Pll Tracking cc Class Reterence8.46. 1 Detailed description48. 47 galileo e5a noncoherentlQ acquisition caf cc class Reference8.47.1 Detailed Description958. 47.2 Constructor Destructor Documentation8.47. 2.1 galileo e5a noncoherentlQ acquisition caf cco8. 47.3 Member Function Documentation968.47. 3.1 general_ work(int output_items, gr_ vector_int &ninput_ items. gr vector_const+void_star &input_items, gr_vector_ void_star &output_items)8.47.32init()968.47.3.3mag(0..968.47.3.4 set active(bool active968.47.3.5 set channel(unsigned int channel)968.47.3.6 set_ doppler_ max(unsigned int doppler_ max)8.47.3.7 set_ doppler_ step(unsigned int doppler step8.47.3.8 set_gnss synchro(Gnss Synchro *p_gnss_ synchro8.47.3.9 set_local_code(std: complex< float >*code, std: complex< float > *code Q)97