少有人走的路这个例子中，勇哥使用的相机型号为：型号：MV-EM500M，使用的GigE接口。
这个例程演示了利用相机的SDK进行图像采集、保存、缩放、翻转、旋转。
采集的图像（实时的）是直接写到了form窗口上，利用了窗体的Paint事件。
代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using MVGigE=MVAPI.MVGigE ;
using MVImage=MVAPI.MVImage ;
using MVSTATUS = MVAPI.MVSTATUS_CODES;
using System.Diagnostics;
namespace Cross
{
public partial class Cross : Form
{
public delegate int InvokeDraw();
InvokeDraw invokeDraw = null;
IntPtr m_hCam = IntPtr.Zero;
MVAPI.MV_PixelFormatEnums m_PixelFormat;
int m_nWidth;
int m_nHeight;
IntPtr m_hImage = IntPtr.Zero;
IntPtr m_hImageFlip = IntPtr.Zero;
IntPtr m_hImageRotate = IntPtr.Zero;
IntPtr m_hImageShow = IntPtr.Zero;
int m_nZoom = 1;
int m_nFlip = 0;
int m_nRotate = 0;
IAsyncResult ia = null;
MVAPI.MV_SNAPPROC StreamCBDelegate = null;
public Cross()
{
InitializeComponent();
}
int DrawImage()
{
if (InvokeRequired)
{
if (ia == null)
{
invokeDraw = DrawImage;
ia = this.BeginInvoke(invokeDraw);
}
else if (ia.IsCompleted)
{
invokeDraw = DrawImage;
EndInvoke(ia);
ia = this.BeginInvoke(invokeDraw);
}
return 0;
}
IntPtr hImage = IntPtr.Zero;
int w, h;
IntPtr hdc = IntPtr.Zero;
if (m_nRotate > 0)
{
w = m_nHeight/m_nZoom;
h = m_nWidth / m_nZoom;
m_hImageShow = m_hImageRotate;
}
else
{
h = m_nHeight / m_nZoom;
w = m_nWidth / m_nZoom;
if (m_nFlip > 0)
m_hImageShow = m_hImageFlip;
else
m_hImageShow = m_hImage;
}
hImage = MVImage.MVImageCreate(w, h, 24);
hdc = MVImage.MVImageGetDC(hImage);
MVImage.MVImageDrawEx(m_hImageShow, hdc, 0, 0, w, h, 0, 0, MVImage.MVImageGetWidth(m_hImageShow), MVImage.MVImageGetHeight(m_hImageShow));
Graphics g = Graphics.FromHdcInternal(hdc);
g.DrawLine(new Pen(Color.Green), w / 2, 0, w / 2, h);//坐标
g.DrawLine(new Pen(Color.Green), 0, h / 2, w, h/ 2);//坐标
MVImage.MVImageDrawHwnd(hImage, this.Handle, 8, 40);
MVImage.MVImageReleaseDC(hImage);
MVImage.MVImageRelease(hImage);
g.Dispose();
return 0;
}
int ShowImage(ref MVAPI.IMAGE_INFO pInfo)
{
MVGigE.MVInfo2Image(m_hCam, ref pInfo, m_hImage);
Flip();
Rotate();
return DrawImage();
}
int StreamCB(ref MVAPI.IMAGE_INFO pInfo, IntPtr UserVal)
{
return ShowImage(ref pInfo);
}
private void Cross_Load(object sender, EventArgs e)
{
MVGigE.MVInitLib();
MVGigE.MVUpdateCameraList();
int CamNum = 0;
MVSTATUS r = MVGigE.MVGetNumOfCameras(out CamNum);
if (CamNum == 0)
{
MessageBox.Show("没有找到相机，请确认连接和相机IP设置");
return;
}
r = MVGigE.MVOpenCamByIndex(0, out m_hCam);
if (m_hCam == IntPtr.Zero)
{
if (r == MVSTATUS.MVST_ACCESS_DENIED)
{
MessageBox.Show("无法打开相机，可能正被别的软件控制");
return;
}
}
int w, h;
r = MVGigE.MVGetWidth(m_hCam, out w);
if (r != MVSTATUS.MVST_SUCCESS)
{
MessageBox.Show("取得图像宽度失败");
return;
}
r = MVGigE.MVGetHeight(m_hCam, out h);
if (r != MVSTATUS.MVST_SUCCESS)
{
MessageBox.Show("取得图像高度失败");
return;
}
r = MVGigE.MVGetPixelFormat(m_hCam, out m_PixelFormat);
if (r != MVSTATUS.MVST_SUCCESS)
{
MessageBox.Show("取得图像颜色模式失败");
return;
}
m_nWidth = w;
m_nHeight = h;
if (m_PixelFormat == MVAPI.MV_PixelFormatEnums.PixelFormat_Mono8)
{
m_hImage = MVImage.MVImageCreate(w, h, 8);
m_hImageFlip = MVImage.MVImageCreate(w, h, 8);
m_hImageRotate = MVImage.MVImageCreate(h, w, 8);
}
else
{
m_hImage = MVImage.MVImageCreate(w, h, 24);
m_hImageFlip = MVImage.MVImageCreate(w, h, 24);
m_hImageRotate = MVImage.MVImageCreate(h, w, 24);
}
r = MVGigE.MVSetStrobeSource(m_hCam, MVAPI.LineSourceEnums.LineSource_ExposureActive);
if (r != MVSTATUS.MVST_SUCCESS)
{
MessageBox.Show("设置外闪光同步信号源失败");
}
InitZoom();
InitFlip();
InitRotate();
}
private void CaptureSnap_Click(object sender, EventArgs e)
{
StreamCBDelegate += new MVAPI.MV_SNAPPROC(StreamCB);
MVGigE.MVSetTriggerMode(m_hCam, MVAPI.TriggerModeEnums.TriggerMode_Off);
MVGigE.MVStartGrab(m_hCam, StreamCBDelegate, this.Handle);
StopSnap.Enabled = true;
CaptureSnap.Enabled = false;
}
private void StopSnap_Click(object sender, EventArgs e)
{
MVGigE.MVStopGrab(m_hCam);
StreamCBDelegate -= new MVAPI.MV_SNAPPROC(StreamCB);
StopSnap.Enabled = false;
CaptureSnap.Enabled = true;
}
private void Save_Click(object sender, EventArgs e)
{
if (saveFileDialog1.ShowDialog(this) == DialogResult.OK)
{
MVImage.MVImageSave(m_hImageShow, saveFileDialog1.FileName);
}
}
private void Cross_Paint(object sender, PaintEventArgs e)
{
if (CaptureSnap.Enabled&&m_hImage !=IntPtr.Zero)
{
DrawImage();
}
}
private void Cross_FormClosing(object sender, FormClosingEventArgs e)
{
MVGigE.MVSetTriggerMode(m_hCam, MVAPI.TriggerModeEnums.TriggerMode_Off);
MVGigE.MVCloseCam(m_hCam);
MVImage.MVImageRelease(m_hImage);
MVImage.MVImageRelease(m_hImageFlip);
MVImage.MVImageRelease(m_hImageRotate);
m_hCam = IntPtr.Zero;
}
private void InitZoom()
{
comboBox_Zoom.Items.Add("25%");
comboBox_Zoom.Items.Add("50%");
comboBox_Zoom.Items.Add("100%");
comboBox_Zoom.SelectedIndex = 2;
m_nZoom = 1;
}
private void InitFlip()
{
comboBox_Flip.Items.Add("不翻转");
comboBox_Flip.Items.Add("左右翻转");
comboBox_Flip.Items.Add("上下翻转");
comboBox_Flip.Items.Add("同时翻转");
comboBox_Flip.SelectedIndex = 0;
}
private void InitRotate()
{
comboBox_Rotate.Items.Add("不旋转");
comboBox_Rotate.Items.Add("顺时针90°");
comboBox_Rotate.Items.Add("逆时针90°");
comboBox_Rotate.SelectedIndex = 0;
}
private void comboBox_Flip_SelectedIndexChanged(object sender, EventArgs e)
{
m_nFlip = comboBox_Flip.SelectedIndex;
if (CaptureSnap.Enabled)
{
Flip();
Rotate();
this.Refresh();
}
}
private void comboBox_Rotate_SelectedIndexChanged(object sender, EventArgs e)
{
m_nRotate = comboBox_Rotate.SelectedIndex;
if (CaptureSnap.Enabled)
{
Rotate();
}
this.Refresh();
}
private void comboBox_Zoom_SelectedIndexChanged(object sender, EventArgs e)
{
switch (comboBox_Zoom.SelectedIndex)
{
case 0:
m_nZoom = 4;
break;
case 1:
m_nZoom = 2;
break;
case 2:
m_nZoom = 1;
break;
default:
m_nZoom = 1;
break;
}
this.Refresh();
}
private void Flip()
{
int nFlip = m_nFlip;
switch (nFlip)
{
case 0:
break;
case 1:
MVGigE.MVImageFlip(m_hCam, m_hImage, m_hImageFlip, MVAPI.ImageFlipType.FlipHorizontal);
break;
case 2:
MVGigE.MVImageFlip(m_hCam, m_hImage, m_hImageFlip, MVAPI.ImageFlipType.FlipVertical);
break;
case 3:
MVGigE.MVImageFlip(m_hCam, m_hImage, m_hImageFlip, MVAPI.ImageFlipType.FlipBoth);
break;
default:
break;
}
}
private void Rotate()
{
int nRotate = m_nRotate;
if (nRotate == 0)
{
return;
}
IntPtr hImage = m_hImage;
if (m_nFlip != 0)
{
hImage = m_hImageFlip;
}
switch (nRotate)
{
case 1:
MVGigE.MVImageRotate(m_hCam, hImage, m_hImageRotate, MVAPI.ImageRotateType.Rotate90DegCw);
break;
case 2:
MVGigE.MVImageRotate(m_hCam, hImage, m_hImageRotate, MVAPI.ImageRotateType.Rotate90DegCcw);
break;
default:
break;
}
}
}
}---------------------
作者：hackpig
来源：www.skcircle.com
版权声明：本文为博主原创文章，转载请附上博文链接！
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