天天向上

C# Grabber Service選取GrabberService專案按下滑鼠右鍵並選取管理NuGet套件安裝Newtonsoft.Json套件專案新增appsettings.json選取GrabberService專案按下滑鼠右鍵並選取"加入"，接著選取"新增項目"輸入名稱: appsettings.json滑鼠雙擊開啟appsettings.jsonGrabberService/FrameHeader.csusing System.Runtime.InteropServices;
namespace GrabberService;
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct FrameHeader
{
public ulong FrameId;
public ulong TimestampNs;
public uint Width;
public uint Height;
public uint Stride;
public uint PixelFormat;
public uint ImageSize;
public uint CameraIndex;
public uint Flags;
}

今天測試同步播放兩支影片

 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

using System;

 using System.Threading;

 using Emgu.CV;

 using Emgu.CV.CvEnum;

 using Emgu.CV.Structure;

 using System.Windows.Forms;

 

 namespace WaferPositioning

 {

 // 同時播放兩支影片

 public class DualVideoPlayer

 {

 private VideoCapture capture1;

 private VideoCapture capture2;

 private ManualResetEvent pauseEvent = new ManualResetEvent(true);

 private bool stopThreads = false;

 

 public event EventHandler<FrameReadyEventArgs> FrameReady;

 

 public DualVideoPlayer(string videoFile1, string videoFile2)

 {

 capture1 = new VideoCapture(videoFile1);

 capture2 = new VideoCapture(videoFile2);

 }

 

 public void Start()

 {

 stopThreads = false;

 pauseEvent.Set(); // Resume if paused

 ThreadPool.QueueUserWorkItem(o => StartVideoPlayback());

 }

 

 public void Pause()

 {

 pauseEvent.Reset(); // Pause playback

 }

 

 public void Resume()

 {

 pauseEvent.Set(); // Resume playback

 }

 

 public void Stop()

 {

 stopThreads = true;

 pauseEvent.Set(); // Resume if paused

 }

 

 private void StartVideoPlayback()

 {

 while (!stopThreads)

 {

 pauseEvent.WaitOne(); // Pause if signaled

 

 Mat frame1 = new Mat();

 Mat frame2 = new Mat();

 

 // Read frames from the video captures

 capture1.Read(frame1);

 capture2.Read(frame2);

 

 if (!frame1.IsEmpty && !frame2.IsEmpty)

 {

 FrameReady?.Invoke(this, new FrameReadyEventArgs(frame1, frame2));

 }

 else

 {

 // End of video, you may want to stop or loop the playback

 capture1.Set(CapProp.PosFrames, 0);

 capture2.Set(CapProp.PosFrames, 0);

 }

 Thread.Sleep(33);

 Application.DoEvents(); // Allow UI events to be processed

 }

 }

 }

 

 public class FrameReadyEventArgs : EventArgs

 {

 public Mat Frame1 { get; }

 public Mat Frame2 { get; }

 

 public FrameReadyEventArgs(Mat frame1, Mat frame2)

 {

 Frame1 = frame1;

 Frame2 = frame2;

 }

 }

 }

 

編輯應用程式 App.config

 

 
下載 .NET 7.0 x64

nuGet管理套件安裝
1. SQLite

 1: static void Main(string[] args)

 2: {

 3: var v1 = f1();

 4: var avg1 = v1 / 3;

 5: Console.WriteLine($"{avg1.GetType().Name}, avg: {avg1}");

 6:  

 7: var v2 = f2();

 8: var avg2 = v2 / 3;

 9: Console.WriteLine($"{avg2.GetType().Name}, avg: {avg2}");

 10:  

 11: var v3 = f3();

 12: var avg3 = v3 / 3;

 13: Console.WriteLine($"{avg3.GetType().Name}, avg: {avg3}");

 14:  

 15: var v4 = f4();

 16: var avg4 = v4 / 3;

 17: Console.WriteLine($"{avg4.GetType().Name}, avg: {avg4}");

 18:  

 19: var v5 = f5();

 20: var avg5 = v5 / 3;

 21: Console.WriteLine($"{avg5.GetType().Name}, avg: {avg5}");

 22: Console.ReadKey();

 23: }

 24: static double f1()

 25: {

 26: double x = 100;

 27: return x;

 28: }

 29: static float f2()

 30: {

 31: float x = 100;

 32: return x;

 33: }

 34: static decimal f3()

 35: {

 36: decimal x = 100;

 37: return x;

 38: }

 39: static long f4()

 40: {

 41: long x = 100;

 42: return x;

 43: }

 44: static Int32 f5()

 45: {

 46: Int32 x = 100;

 47: return x;

 48: }

C# call a c++ method, which is called GetSourceImage(…)The following is the way how we get the bitmap data by copying srcBmpData to dstBmpdata, and showing them on a pictureBox.The copy sequence is just the same as OpenCV BGR, it looks as though we create a Format32bppArgb image. ,

 1: this.Invoke((MethodInvoker)delegate

 2: {

 3: int width, height, channel, step;

 4: unsafe

 5: {

 6: byte* srcBmpData = cVideo.GetSourceImage(&width, &height, &channel, &step);

 7: Result_lbl.Text = $"{width},{height},{channel},{step}";

 8: Bitmap bmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);

 9: var data = bmp.LockBits(new Rectangle(0, 0, width, height),

 10: System.Drawing.Imaging.ImageLockMode.WriteOnly,

 11: System.Drawing.Imaging.PixelFormat.Format32bppRgb);

 12: byte* dstBmpData = (byte*)data.Scan0.ToPointer();

 13: int hei = height;

 14: int wid = width;

 15: int stepsize = step;

 16: 

 17:  

 18: for (int y = 0; y < height; y++)

 19: {

 20: for (int x = 0; x < width; x++)

 21: {

 22: dstBmpData[y * width * 4 + 4 * x] = srcBmpData[y * step + channel * x];

 23: dstBmpData[y * width * 4 + 4 * x + 1] = srcBmpData[y * step + channel * x + 1];

 24: dstBmpData[y * width * 4 + 4 * x + 2] = srcBmpData[y * step + channel * x + 2];

 25: }

 26: }

 27: bmp.UnlockBits(data);

 28: pictureBox1.Image = bmp;

 29: }

 30: });

以下根據 DKTD-WinFormThreading 文章節錄重點
1.自己建立thread優點: 精確管理thread生命週期缺點: 執行緒數目過多時
，CPU會耗費太多的資源處理Context Switching

 1:  

 2: enum Animal

 3: {

 4: Dog = 0x0001,

 5: Cat = 0x0002,

 6: Duck = 0x0004,

 7: Chicken = 0x0008

 8: }

 9: static void Main(string[] args)

 10: {

 11: Animal animals = Animal.Dog | Animal.Cat;

 12: Console.WriteLine(animals.ToString());

 13: Console.ReadKey();

 14: }

先說結論:  readonly比較不會出錯，一般狀況新版的dll蓋過去就好，但如果是const狀況，須將整個專案重新編譯，才不會出錯!
參考資料:[C#.NET] 定義常數時用 readonly 好? 還是 const 好?

Serialization is used to write class objects to files.[1] De-Serialization is used to recover the objects from the file.
When we want to transport an object through network then we have to convert the object into a stream of bytes.[2] The process of converting an object into a stream of bytes is called Serialization. For an object to be serializable, it should implement ISerialize Interface. De-serialization is the reverse process of creating an object from a stream of bytes.
參考資料:1. C# Serialization & Deserialization with Example

參考資料1. SQLite 資料庫 C# 程式範例－使用 Dapper