【实例简介】
【实例截图】
【核心代码】
using
System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing.Imaging;
using
System.Text;
using
System.Windows;
using
System.Windows.Forms;
using
System.IO;
using
System.Windows.Media.Imaging;
using
AForge;
using
AForge.Controls;
using
AForge.Video;
using
AForge.Video.DirectShow;
using
Size = System.Drawing.Size;
using
System.Configuration;
using
System.Drawing;
using
System.Drawing.Drawing2D;
namespace
OperateCamera
{
public
partial
class
Form1 : Form
{
private
FilterInfoCollection videoDevices;
private
VideoCaptureDevice videoSource;
public
Form1()
{
InitializeComponent();
}
private
void
Form1_Load(
object
sender, EventArgs e)
{
try
{
// 枚举所有视频输入设备
videoDevices =
new
FilterInfoCollection(FilterCategory.VideoInputDevice);
if
(videoDevices.Count == 0)
throw
new
ApplicationException();
foreach
(FilterInfo device
in
videoDevices)
{
tscbxCameras.Items.Add(device.Name);
}
tscbxCameras.SelectedIndex = 0;
}
catch
(ApplicationException)
{
tscbxCameras.Items.Add(
"No local capture devices"
);
videoDevices =
null
;
}
}
private
void
btnConnect_Click(
object
sender, EventArgs e)
{
CameraConn();
}
//连接摄像头
private
void
CameraConn()
{
videoSourcePlayer.SignalToStop();
videoSourcePlayer.WaitForStop();
VideoCaptureDevice videoSource =
new
VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString);
videoSource.DesiredFrameSize =
new
System.Drawing.Size(1280, 1024);
videoSource.DesiredFrameRate = 1;
videoSourcePlayer.VideoSource = videoSource;
videoSourcePlayer.Start();
}
//关闭摄像头
private
void
btnClose_Click(
object
sender, EventArgs e)
{
videoSourcePlayer.SignalToStop();
videoSourcePlayer.WaitForStop();
}
//主窗体关闭
private
void
Form1_FormClosing(
object
sender, FormClosingEventArgs e)
{
btnClose_Click(
null
,
null
);
}
//拍照
private
void
Photograph_Click(
object
sender, EventArgs e)
{
try
{
if
(videoSourcePlayer.IsRunning)
{
BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
videoSourcePlayer.GetCurrentVideoFrame().GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
//
PngBitmapEncoder pE =
new
PngBitmapEncoder();
BitmapFrame bitmap = BitmapFrame.Create(bitmapSource);
pE.Frames.Add(bitmap);
string
fileName = DateTime.Now.ToString(
"yyyyMMddHHmmss"
)
"_1"
;
string
fileSaveName = DateTime.Now.ToString(
"yyyyMMddHHmmss"
);
string
picName = GetImagePath()
"\\"
fileName
".jpg"
;
string
saveName = GetImagePath()
"\\"
fileSaveName
".jpg"
;
if
(File.Exists(picName))
{
File.Delete(picName);
}
using
(Stream stream = File.Create(picName))
{
pE.Save(stream);
}
//拍照完成后关摄像头并刷新同时关窗体
//if (videoSourcePlayer != null && videoSourcePlayer.IsRunning)
//{
// videoSourcePlayer.SignalToStop();
// videoSourcePlayer.WaitForStop();
//}
GetThumbnail(picName, saveName, 1920, 1080);
}
}
catch
(Exception ex)
{
MessageBox.Show(
"摄像头异常:"
ex.Message);
}
}
//文件存储路径
private
string
GetImagePath()
{
AppSettingsReader reader =
new
AppSettingsReader();
string
strServer = reader.GetValue(
"ServerPath"
,
typeof
(
string
)).ToString();
//string personImgPath = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory)
// Path.DirectorySeparatorChar.ToString() "PersonImg";
string
personImgPath =
"\\\\"
strServer
"\\upload"
;
if
(!Directory.Exists(personImgPath))
{
Directory.CreateDirectory(personImgPath);
}
return
personImgPath;
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="serverImagePath">图片地址</param>
/// <param name="thumbnailImagePath">缩略图地址</param>
/// <param name="width">图片宽度</param>
/// <param name="height">图片高度</param>
/// <param name="p"></param>
public
static
bool
GetThumbnail(
string
serverImagePath,
string
thumbnailImagePath,
int
width,
int
height)
{
System.Drawing.Image serverImage = System.Drawing.Image.FromFile(serverImagePath);
//画板大小
int
towidth = width;
int
toheight = height;
//缩略图矩形框的像素点
int
x = 0;
int
y = 0;
int
ow = serverImage.Width;
int
oh = serverImage.Height;
if
(ow > oh)
{
toheight = serverImage.Height * width / serverImage.Width;
}
else
{
towidth = serverImage.Width * height / serverImage.Height;
}
//新建一个bmp图片
System.Drawing.Image bm =
new
System.Drawing.Bitmap(width, height);
//新建一个画板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bm);
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(System.Drawing.Color.White);
//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(serverImage,
new
System.Drawing.Rectangle((width - towidth) / 2, (height - toheight) / 2, towidth, toheight),
0, 0, ow, oh, System.Drawing.GraphicsUnit.Pixel);
try
{
//以jpg格式保存缩略图
bm.Save(thumbnailImagePath, System.Drawing.Imaging.ImageFormat.Jpeg);
serverImage.Dispose();
bm.Dispose();
g.Dispose();
//删除原图
File.Delete(serverImagePath);
return
true
;
}
catch
(System.Exception e)
{
return
false
;
throw
e;
}
finally
{
serverImage.Dispose();
bm.Dispose();
g.Dispose();
}
}
// /// <summary>
// /// 从视频中截取图片,调用GetNewImage方法,自定义图片大小,返回Bitmap格式图片
// /// </summary>
// /// <returns></returns>
// private Bitmap GetImage()
// {
// Bitmap bitmap;
// try
// {
// CameraForm.SendMessage(this.hHwnd, 0x41e, 0, 0);
// System.Windows.IDataObject obj1 = System.Windows.Clipboard.GetDataObject();
// if (obj1.GetDataPresent(typeof(Bitmap)))
// {
// bitmap= (Bitmap)obj1.GetData(typeof(Bitmap));
// GetNewImage(bitmap, 300, 300);//自定图片大小
// }
//}
// catch
// {
//}
// return bitmap;
// }
// /// <summary>
// /// 对图片进行处理,返回一个Image类别的对象
// /// </summary>
// /// <param name="oldImgPath">原图片路径</param>
// /// <param name="newWidth">新图片宽度</param>
// /// <param name="newHeight">新图片高度</param>
// /// <returns></returns>
// private Image GetNewImage(Bitmap bmap, int newWidth, int newHeight)
// {
// Image oldImg = bmap;
// Image newImg = oldImg.GetThumbnailImage(newWidth, newHeight, new Image.GetThumbnailImageAbort(IsTrue), IntPtr.Zero); // 对原图片进行缩放
// return newImg;
// }
}
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