实例介绍
【实例简介】
【实例截图】
【核心代码】
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | 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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