C#如何调用SDK采集图像并在Halcon窗口中显示

本篇内容主要讲解“C#如何调用SDK采集图像并在Halcon窗口中显示”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“C#如何调用SDK采集图像并在Halcon窗口中显示”吧!

开发环境    VS2012+C#（32位）  Halcon12

引用动态链接库

引用Halcon动态链接库（halcondotnet.dll）

引用海康相机动态链接库（MvCameraControl.Net.dll）这个文件在MVS安装目录下MVS\Development\DotNet中，如果你是32位的开发环境就选择win32文件夹下的，如果是64位就选择win64文件夹下的

创建相机类

先在创建的类中编写方法，之后实例化相机类，调用类中的方法。

鼠标右键单击工程项目–添加–类，选择“类”，输入类的名称，例如Hikvision，点击右下角的“添加”。

首先，要引入的命名空间：using HalconDotNet;     using MvCamCtrl.NET;

其次，需要用到的全部变量：

private MyCamera m_pMyCamera;MyCamera.MV_CC_DEVICE_INFO_LIST m_pDeviceList;//设备列表private MyCamera.MVCC_INTVALUE stParam;//用于接收特定的参数//为读取、保存图像创建的数组UInt32 m_nBufSizeForDriver = 3072 * 2048 * 3;byte[] m_pBufForDriver = new byte[3072 * 2048 * 3];UInt32 m_nBufSizeForSaveImage = 3072 * 2048 * 3 * 3 + 2048;byte[] m_pBufForSaveImage = new byte[3072 * 2048 * 3 * 3 + 2048];//要转成的Halcon图像HImage image = new HImage();

(1) 查找设备列表

        //查找设备        public void DeviceListAcq()        {            int nRet;            // ch:创建设备列表 en:Create Device List            System.GC.Collect();            cbDeviceList.Items.Clear();            nRet = MyCamera.MV_CC_EnumDevices_NET(MyCamera.MV_GIGE_DEVICE | MyCamera.MV_USB_DEVICE, ref m_pDeviceList);            if (0 != nRet)            {                MessageBox.Show("查找设备失败！");                return;            }             // ch:在窗体列表中显示设备名 | en:Display device name in the form list            for (int i = 0; i < m_pDeviceList.nDeviceNum; i++)            {                MyCamera.MV_CC_DEVICE_INFO device = (MyCamera.MV_CC_DEVICE_INFO)Marshal.PtrToStructure(m_pDeviceList.pDeviceInfo[i], typeof(MyCamera.MV_CC_DEVICE_INFO));                if (device.nTLayerType == MyCamera.MV_GIGE_DEVICE)                {                    IntPtr buffer = Marshal.UnsafeAddrOfPinnedArrayElement(device.SpecialInfo.stGigEInfo, 0);                    MyCamera.MV_GIGE_DEVICE_INFO gigeInfo = (MyCamera.MV_GIGE_DEVICE_INFO)Marshal.PtrToStructure(buffer, typeof(MyCamera.MV_GIGE_DEVICE_INFO));                    if (gigeInfo.chUserDefinedName != "")                    {                        cbDeviceList.Items.Add("GigE: " + gigeInfo.chUserDefinedName + " (" + gigeInfo.chSerialNumber + ")");                    }                    else                    {                        cbDeviceList.Items.Add("GigE: " + gigeInfo.chManufacturerName + " " + gigeInfo.chModelName + " (" + gigeInfo.chSerialNumber + ")");                    }                }                else if (device.nTLayerType == MyCamera.MV_USB_DEVICE)                {                    IntPtr buffer = Marshal.UnsafeAddrOfPinnedArrayElement(device.SpecialInfo.stUsb3VInfo, 0);                    MyCamera.MV_USB3_DEVICE_INFO usbInfo = (MyCamera.MV_USB3_DEVICE_INFO)Marshal.PtrToStructure(buffer, typeof(MyCamera.MV_USB3_DEVICE_INFO));                    if (usbInfo.chUserDefinedName != "")                    {                        cbDeviceList.Items.Add("USB: " + usbInfo.chUserDefinedName + " (" + usbInfo.chSerialNumber + ")");                    }                    else                    {                        cbDeviceList.Items.Add("USB: " + usbInfo.chManufacturerName + " " + usbInfo.chModelName + " (" + usbInfo.chSerialNumber + ")");                    }                }            }             // ch:选择第一项 | en:Select the first item            if (m_pDeviceList.nDeviceNum != 0)            {                cbDeviceList.SelectedIndex = 0;            }        }

(2) 打开设备

        //打开设备        public void OpenDevice()        {            if (m_pDeviceList.nDeviceNum == 0 || cbDeviceList.SelectedIndex == -1)            {                MessageBox.Show("未发现设备，请选择");                return;            }            int nRet = -1;             // ch:获取选择的设备信息 | en:Get selected device information            MyCamera.MV_CC_DEVICE_INFO device =                (MyCamera.MV_CC_DEVICE_INFO)Marshal.PtrToStructure(m_pDeviceList.pDeviceInfo[cbDeviceList.SelectedIndex],                                                              typeof(MyCamera.MV_CC_DEVICE_INFO));             // ch:打开设备 | en:Open device            if (null == m_pMyCamera)            {                m_pMyCamera = new MyCamera();                if (null == m_pMyCamera)                {                    return;                }            }             nRet = m_pMyCamera.MV_CC_CreateDevice_NET(ref device);            if (MyCamera.MV_OK != nRet)            {                return;            }             nRet = m_pMyCamera.MV_CC_OpenDevice_NET();            if (MyCamera.MV_OK != nRet)            {                m_pMyCamera.MV_CC_DestroyDevice_NET();                MessageBox.Show("设备打开失败");                //ShowErrorMsg("Device open fail!", nRet);                return;            }             // ch:探测网络最佳包大小(只对GigE相机有效) | en:Detection network optimal package size(It only works for the GigE camera)            if (device.nTLayerType == MyCamera.MV_GIGE_DEVICE)            {                int nPacketSize = m_pMyCamera.MV_CC_GetOptimalPacketSize_NET();                if (nPacketSize > 0)                {                    nRet = m_pMyCamera.MV_CC_SetIntValue_NET("GevSCPSPacketSize", (uint)nPacketSize);                    if (nRet != MyCamera.MV_OK)                    {                        Console.WriteLine("Warning: Set Packet Size failed {0:x8}", nRet);                    }                }                else                {                    Console.WriteLine("Warning: Get Packet Size failed {0:x8}", nPacketSize);                }            }             // ch:设置采集连续模式 | en:Set Continues Aquisition Mode            m_pMyCamera.MV_CC_SetEnumValue_NET("AcquisitionMode", 2);// ch:工作在连续模式 | en:Acquisition On Continuous Mode            m_pMyCamera.MV_CC_SetEnumValue_NET("TriggerMode", 0);    // ch:连续模式 | en:Continuous        }

(3) 连续采集

        //连续采集（也就是实时显示）        public void ContinuesGrab(PictureBox picBox)        {            int nRet;             // ch:开始采集 | en:Start Grabbing            nRet = m_pMyCamera.MV_CC_StartGrabbing_NET();            if (MyCamera.MV_OK != nRet)            {                MessageBox.Show("采集失败！");                //ShowErrorMsg("Trigger Fail!", nRet);                return;            }             //实时采集            m_pMyCamera.MV_CC_SetEnumValue_NET("TriggerMode", 0);             // ch:显示 | en:Display   在PictureBox控件中显示            nRet = m_pMyCamera.MV_CC_Display_NET(picBox.Handle);            if (MyCamera.MV_OK != nRet)            {                MessageBox.Show("显示失败！");            }        }

(4) 停止采集

        //停止采集        public void StopGrab()        {            int nRet = -1;            // ch:停止采集 | en:Stop Grabbing            nRet = m_pMyCamera.MV_CC_StopGrabbing_NET();            if (nRet != MyCamera.MV_OK)            {                MessageBox.Show("停止采集失败！");            }         }

(5) 关闭设备

        //关闭设备        public void CloseDevice()        {            // ch:关闭设备 | en:Close Device            int nRet;             nRet = m_pMyCamera.MV_CC_CloseDevice_NET();            if (MyCamera.MV_OK != nRet)            {                return;            }             nRet = m_pMyCamera.MV_CC_DestroyDevice_NET();            if (MyCamera.MV_OK != nRet)            {                return;            }        }

(6) 转成Halcon图像

        //读取图片转换成Halcon图像        public HImage ReadImage()        {            int nRet;            //MyCamera.MVCC_INTVALUE stParam = new MyCamera.MVCC_INTVALUE();            UInt32 nPayloadSize = 0;            nRet = m_pMyCamera.MV_CC_GetIntValue_NET("PayloadSize", ref stParam);            if (MyCamera.MV_OK != nRet)            {                return null;            }            nPayloadSize = stParam.nCurValue;            if (nPayloadSize > m_nBufSizeForDriver)            {                m_nBufSizeForDriver = nPayloadSize;                m_pBufForDriver = new byte[m_nBufSizeForDriver];                m_nBufSizeForSaveImage = m_nBufSizeForDriver * 3 + 2048;                m_pBufForSaveImage = new byte[m_nBufSizeForSaveImage];            }             IntPtr pData = Marshal.UnsafeAddrOfPinnedArrayElement(m_pBufForDriver, 0);            MyCamera.MV_FRAME_OUT_INFO_EX stFrameInfo = new MyCamera.MV_FRAME_OUT_INFO_EX();            nRet = m_pMyCamera.MV_CC_GetOneFrameTimeout_NET(pData, m_nBufSizeForDriver, ref stFrameInfo, 1000);//获取一帧图像，超时时间设置为1000            if (MyCamera.MV_OK != nRet)            {                return null;            }             HImage image = new HImage();             //采集的是黑白图像，利用Halcon图像库中的GenImage1算子来构建图像            image.GenImage1("byte", (int)stFrameInfo.nWidth, (int)stFrameInfo.nHeight, pData);            return image;        }

下面是我所做的一个窗体界面，显示设备序列号的下拉列表做成了一个用户控件，将上述的代码全部放在用户控件中，在主窗体里调用用户控件里的方法来实现相机的连接和采集

具体见示例代码。

示例代码：

        //查找设备        private void btnEnum_Click(object sender, EventArgs e)        {            ucDeviceList1.DeviceListAcq();        }         //打开设备        private void btnOpen_Click(object sender, EventArgs e)        {            ucDeviceList1.OpenDevice();            btnOpen.Enabled = false;            btnClose.Enabled = true;             btnContinuesGrab.Enabled = true;            //btnSingleStep.Enabled = true;            btnStopGrab.Enabled = true;        }         //关闭设备        private void btnClose_Click(object sender, EventArgs e)        {            ucDeviceList1.CloseDevice();             btnOpen.Enabled = true;            btnClose.Enabled = false;             btnContinuesGrab.Enabled = false;            btnSingleStep.Enabled = false;            btnStopGrab.Enabled = false;        }         //实时显示        private void btnContinuesGrab_Click(object sender, EventArgs e)        {            ucDeviceList1.ContinuesGrab(picboxShowImg);            btnContinuesGrab.Enabled = false;            btnSingleStep.Enabled = true;            btnStopGrab.Enabled = true;        }         //单步采集        private void btnSingleStep_Click(object sender, EventArgs e)        {            // 将采集到的图像在Halcon窗口中显示            HTuple hWind = hWindowControl1.HalconWindow;             HTuple width, height;             HObject hv_image;            HOperatorSet.GenEmptyObj(out hv_image);            hv_image.Dispose();            hv_image = ucDeviceList1.ReadImage();             HOperatorSet.GetImageSize(hv_image, out width, out height);            HOperatorSet.SetPart(hWind, 0, 0, height - 1, width - 1);            HOperatorSet.DispObj(img, hWind);             btnStopGrab.Enabled = true;         }         //停止采集        private void btnStopGrab_Click(object sender, EventArgs e)        {            ucDeviceList1.StopGrab();            btnContinuesGrab.Enabled = true;            btnStopGrab.Enabled = false;        }         //关闭设备        private void btnClose_Click(object sender, EventArgs e)        {            ucDeviceList1.CloseDevice();             btnOpen.Enabled = true;            btnClose.Enabled = false;             btnContinuesGrab.Enabled = false;            btnSingleStep.Enabled = false;            btnStopGrab.Enabled = false;        }

注：上述方法是不需要修改相机IP的，但是要提前用MVS软件修改相机的IP

到此，相信大家对“C#如何调用SDK采集图像并在Halcon窗口中显示”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！