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一种基于肤色和脸部特征的人脸检测方法

于 2020-12-10 发布
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针对人脸检测问题中快速性与准确性难以同时满足的情况,提出了一种将肤色和脸部特征相结合的方法来检测人脸。由于通过基于肤色的算法能快速定位出人脸大致位置,因而检测速度能达到实时的要求;同时利用脸部特征进一步细检,可保证检测的精确性。

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SpecificationsyperTransport Technology Overview1HT SyStems3-2HT Flow ControlHyper Transport MegaCore Function SpecificationPhysical InterfaceSynchronization and alignment ...Protocol interfClocking Options.......HyperTransport Mega Core Function Parameters and HT Link Performance3-10Signals3-14CSR Module...3-31OpenCore plus time-Out BehaviorAppendix A. ParametersIntroduction鲁鲁鲁A-1Parameter listsDevice Family and Read Only registers···········,,,,,,,,,,A-1Base Address Registers番鲁,A-2Clocking OptionsA-3Advanced settingso March 2009 Altera corporationHyperTransport MegaCore Function User GuideAppendix B. Stratix Device Pin AssignmentsIntroductionB-1GuidelinesAppendix C. Example designGeneral descriptionAdditional informationRevision historyInto-lHow to Contact alteraInfo-1Typographic Conventions ..........Info-2Hyper Transport MegaCore Function User Guideo March 2009 Altera CorporationA吉RA1. 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Altera does not verifycompilation with Mega Core function versions older than one releaseDevice Family SupportMegaCore functions provide either full or preliminary support for target Alteradevice families:Full support means the Mega Core function meets all functional and timingrequirements for the device family and may be used in production designsa Preliminary support means the Mega Core function meets all functionalrequirements, but may still be undergoing timing analysis for the device family;itmay be used in production designs with cautionTable 1-2 shows the level of support offered by the Hyper Transport MegaCorefunction for each of the altera device familiesTable 1-2. Device Family SupportDevice FamilySupportHard Copy Stratix@FullStratixFulStratix IIFulStratix‖GXPreliminaryStratix GXOther device familiesNo supportC March 2009 Altera CorporationHyperT ransport Mega Core Function User Guide1-2Chapter 1: About this MegaCore FunctionIntroductionIntroductionThe Hyper Transport Mega Core function implements high-speed packet transfersbetween physical(PhY) and link-layer devices, and is fully compliant with theHyperTransport l/O Link Specification, Revision 1.03. This Mega Core function allowsdesigners to interface to a wide range of Hyper TransportTm technology(hT)enableddevices quickly and easily, including network processors, coprocessors, videochipsets, and ASICsFeaturesThe Hyper Transport Mega Core function has the following features8-bit fully integrated hT end-chain interfacePacket-based protocolDual unidirectional point-to-point linksUp to 16 Gigabits per second(Gbps)throughput(8 Gbps in each direction)200, 300, and 400 MHz DDR links in Stratix and Stratix GX devices200, 300, 400, and 500 MHz ddr links in Stratix II and Stratix II GX devicesLow-swing differential signaling with 100-Q2 differential impedanceHardware verified with Hyper fransport interfaces on multiple industry standardprocessor and bridge devicesFully parameterized mega core function allows flexible, easy configurationFully optimized for the altera stratix Il, Stratix, Stratix GX, and Stratix II GXevice famillesApplication-side interface uses the Altera AtlanticTM interface standardManages Hr flow control, optimizing performance and ease of useIndependent buffering for each HT virtual channelAutomatic handling of ht ordering rulesStalling of one virtual channel does not delay other virtual channels(subject toorderingFlexible parameterized buffer sizes, allowing customization depending onsystem requirementsUser interface has independent interfaces for the HT virtual channels, allowingindependent user logic designCyclic redundancy code(crc) generation and checking to preserve data integrityIntegrated detection and response to common HT error conditions■ CRC errorsEnd-chain errorsFully integrated HT configuration space includes all required configuration spaceregisters and HT capabilities list registersHyper Transport MegaCore Function User Guideo March 2009 Altera CorporationChapter 1: About this MegaCore FunctionPerformance32-bit and 64-bit support across all base address registers bars)automatically handles all csr space accessesVerilog HDL and VHdL simulation supportOpen Core Plus EvaluationWith the Altera free Open Core Plus evaluation feature, you can perform the followingSimulate the behavior of a mcgafunction(Altera MegaCore function or AMPPmegafunction) within your systema Verify the functionality of your design, as well as quickly and easily evaluate itssize and speedGenerate time-limited device programming files for designs that includeMegaCore functionsProgram a device and verify your design in hardwareYou only need to purchase a license for the Mega Core function when you arecompletely satisfied with its functionality and performance and want to take yourdesign to productiono For more information about Open Core Plus hardware evaluation using theHyperTransport MegaCore function, refer to"Open Core Plus Time-Out Behavior"onpage 3-40 and AN 320: Open Core Plus Evaluation of megafunctionsPerformanceThe Hyper Transport Mega Core function uses 20 differential I/O pin pairs and 2single-ended I/O pins, requiring 42 pins total. Table 1-3 through Table 1-5 showtypical performance and adaptive look-up table (alut) or logic element (LE)usagefor the HyperTransport MegaCore function in Stratix II GX, Stratix IL, Stratix, andStratix GX devices respectively, using the Quartus@ II software version 7.1Table 1-3 shows the maximum supported data rates in megabits per second(Mbps)by device family and speed gradeTable 1-3. Maximum Supported Hyper Transport Data Rates (Note 1)Speed GradeDevice Family-36Stratix ll GX devices 1000 Mbps 1000 Mbps 800 MbpsNA(2)N/A(2NA(2)Stratix devices1000 Mbps 1000 Mbps 800 Mbps N/A(2)NA(2)NA(2)Stratix devicesN/A(2N/A(2)00 Mbps 800 Mbps 600 Mbps400 MbpsFlip-Chip packagesStratix devicesNA(2)NA(2)NA(2)600 Mbps400 Mbps400 Mbps(Wire Bond packagesStratix GX devicesN/A(2) N/A(2)800 Mbps 800 Mbps 600 Mbps N/A(2)Notes to table 1-3(1)Rates are per interface bit. Multiply by eight to calculate the uni-directional data rate of an 8-bit inter face(2) Devices ot this speed grade are not ottered in this device familyC March 2009 Altera CorporationHyperTransport Mega Core Function User GuideChapter 1: About this MegaCore FunctionPerformanceTable 1-4 shows performance and device utilization for the Hyper TransportMegaCore function in Stratix II and Stratix II GX devicesTable 1-4. Hyper Transport Mega Core Function Performance in Stratix ll and Stratix ll GX DevicesParametersMemoryUserRXCombinationalHT Link InterfacePosted Non-Posted Response ClockingALUTSLogicfMAX(MHz) MAx(MHz)Buffers BuffersBuffers Option(12)Registers M4K M512 ( 3)3)Shared3.5005200120500125(4RX/TX/Ref35005200500Ref/x8Shared36005400160500>150RX/TXShared4.0006,00016150RX/TX16Shared4,1006,200500125(4)RX/TX/RefShared4.1006200500125(4Ref/TxShared4.2006400160150RX/TXNotes to table 1-4.Refer to " Clocking Options "on page 3-7 for more information about these options(2 )Other parameters(BAR configurations, etc. )vary the alut and Logic Register utilization numbers by approximately +/-200(3)Figures for -3 speed grade devices only(4) When using the Shared Rx/Tx/Ref and Shared Ref/Tx options, the user interface frequency is limited to exactly the ht frequency divided byTable 1-5 shows performance and device utilization for the Hyper TransportMegaCore function in Stratix and Stratix GX devicesTable 1-5. Hyper Transport Mega Core Function Performance in Stratix and Stratix GX DevicesUser Interface fmaxParametersUtilizationHT Link fMAX MHz)MHZ)RXRXSpeed GradePosted Non-Posted Response Clocking Option LEsM4KBuffers BuffersBuffers)(2 Blocks.5-66Shared rx/tx/ref1240010073)100734448888Shared Ref/Tx 7, 60014400400100{3)100(3)Shared rxtx7,90016400400>125>100Shared rxtx8.900125>100168Shared Rx/T×Ref9,400124004001003)100316Shared ref/ ix9.500144001003)10073)16Shared rx/x9.700400125Notes to table 1-5:(1)Refer to Clocking Options"on page 3-7 for more information about these options(2 )Other parameters( BAR configurations etc. )vary the LE utilization by approximately +/-200 LES(3 )When using the Shared Rx/Tx/ Ref and Shared Ref/Tx options, the user interface frequency is limited to exactly the hT frequency divided by fourHyper Transport MegaCore Function User GuideC March 2009 Altera CorporationA吉RA2. Getting StartedDesign FlowTo evaluate the HyperTransport Mega Core function using the Open Core Plus feature,include these steps in your design flowObtain and install the HyperTransport Mega Core functionThe HyperTransport Mega Core function is part of the MegaCore IP Library, which isdistributed with the Quartus ii software and downloadable from the altera websitewww.altera.como For system requirements and installation instructions, refer to Quartus II InstallationLicensing for Windows and Linux Workstations on the Altera website atwww.altera.com/literature/lit-qts.ispFigure 2-1 shows the directory structure after you install the HyperTransportMegaCore function, where is the installation directory. The default installationWindows is C: altera ; on Linux it islopt/alteraFigure 2-1. Directory StructureInstallation directorypContains the Altera MegaCore IP Library and third-party IP coresalteraContains the Altera MegaCore IP LibrarycommonContains shared componentshtContains the Hyper Transport Hyper Transport Megacore function files and documentationdocContains the documentation for the Hyper Transport MegaCore functionlibContains encrypted lower-level design filesexampleContains the design example for the Hyper Transport Mega Core function2. Create a custom variation of the Hyper Transport Mega Core function3. Implement the rest of your design using the design entry method of your choice4. Use the IP functional simulation model to verify the operation of your designo For more information about Ip functional simulation models, refer to the SimulatingAltera IP in Third-Party Simulation Tools chapter in volume 3 of the Quartus II Handbook5. 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On the Windows Start menu, select Programs> Altera> Quartus II tostart the Quartus lI software. Alternatively, you can use the Quartus II Web editionsoftware2. In the Quartus II window, on the File menu, click New Project Wizard. If you didnot turn it off previously, the New Project Wizard Introduction page appears3. On the New Project Wizard Introduction page, click NextHyper Transport MegaCore Function User Guideo March 2009 Altera Corporation
    2020-12-05下载
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