很早的一个项目是用Delphi7写的，后来要换海康的摄像头，就用海康的TCG-225做了测试，能够预览摄像头，手动抓拍，开启监听，监听抓拍事件并提取车牌号码等。启用监听的话，摄像头需要单独配置一下监听地址和接口。
测试环境中，tcg-225配置一下监听地址为本主机ip和端口默认，设置为视频检测的方式，用默认绘制的检测线，把ipad上显示的车牌在镜头前滑过，就可以触发抓拍和识别。效果OK。
└newGkcars/
└HCNetSDKCom/
├AnalyzeData.dll
├AudioIntercom.dll
├HCAlarm.dll
├HCAlarm.lib
├HCCoreDevCfg.dll
├HCDisplay.dll
├HCGeneralCfgMgr.dll
├HCGeneralCfgMgr.lib
├HCIndustry.dll
├HCPlayBack.dll
├HCPreview.dll
├HCPreview.lib
├HCVoiceTalk.dll
├OpenAL32.dll
├StreamTransClient.dll
├SystemTransform.dll
├libiconv2.dll
└msvcr90.dll
├AudioRender.dll
├EagleEyeRender.dll
├GdiPlus.lib
├HCCore.dll
├HCCore.lib
├HCNetSDK.dcu
├HCNetSDK.dll
├HCNetSDK.lib
├HCNetSDK.pas
├HXVA.dll
├MP_Render.dll
├MP_VIE.dll
├NPQos.dll
├PlayCtrl.dll
├PlayCtrl.lib
├Project1.cfg
├Project1.dof
├Project1.dpr
├Project1.exe
├Project1.res
├SuperRender.dll
├Unit1.dcu
├Unit1.ddp
├Unit1.dfm
├Unit1.pas
├YUVProcess.dll
├gdiplus.dll
├hpr.dll
├libeay32.dll
├plaympeg4.dcu
├plaympeg4.pas
├ssleay32.dll
├zlib1.dll
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