Examples LinkSVP four: the machine vision based presentation, motion detection achieved using LinkIVE

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background

    See LinkSVP example of one of Beijing introduced.

LinkSVP Profile

    See one of LinkSVP exampleLinkSVP introduction.

Example achieve movement detection MotionDetect

The sample program demonstrates how to use LinkIVE be a relatively complete motion detection feature development.

Ready to work

• Refer to the user manual setup the development environment, compiler 3531D engineering, network boot configuration parameters.
• With HDMI output device (e.g. camera, a notebook, a set top box, etc.) access the HDMI-A Evaluation Board Interface
• The evaluation board monitor connected HDMI-OUT (1080P can support, default program output 1080P60).
• On power-up, enter the /root/demodirectory
• Run MotionDetectthe program

operation result

Complete project

See the complete project: https://gitee.com/LinkPi/LinkSVP/tree/master/MotionDetect

The main source code

main.cpp

#include <QCoreApplication>
#include "Link.h"
#include "MotionDetect.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    Link::init();

    LinkObject *vi=Link::create("InputVi");
    QVariantMap dataVi;
    dataVi["interface"]="HDMI-A";
    vi->start(dataVi);

    MotionDetect *MD=new MotionDetect();
    QVariantMap dataMD;
    dataMD["framerate"]=4;
    MD->start(dataMD);

    LinkObject *vo=Link::create("OutputVo");
    QVariantMap dataVo;
    dataVo["type"]="hdmi";
    vo->start(dataVo);

    vi->linkV(MD)->linkV(vo);

    return a.exec();
}

MotionDetect.cpp

#include "MotionDetect.h"

MotionDetect::MotionDetect(QObject *parent) : LinkFrame(parent)
{
    data["framerate"]=4;
    data["width"]=640;
    data["height"]=360;
    data["thresh"]=30;
    data["area"]=800;

    mem["pre"]=IVEMem(640,360);
    mem["ccl"]=IVEMem(640,360);
}

void MotionDetect::oneFrame()
{

    Sub(mem["in"],mem["pre"],mem["out"]);
    thresh(mem["out"],mem["out"],data["thresh"].toInt());
    erode(mem["out"],mem["out"],3);
    dilate(mem["out"],mem["out"],5);
    copy(mem["out"],mem["ccl"]);
    wait();
    QVariantList list=CCL(mem["ccl"],data["area"].toInt());

    copy(mem["in"],mem["pre"]);
    wait();

    if(list.count()>0)
    {
        qDebug("######################################");
        for(int i=0;i<list.count();i++)
        {
            qDebug()<<list[i];
        }
    }
}