update
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Kq
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net10.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Emgu.CV" Version="4.13.0.5924" />
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<PackageReference Include="Emgu.CV.Bitmap" Version="4.13.0.5924" />
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<PackageReference Include="OpenCvSharp4" Version="4.13.0.20260627" />
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<PackageReference Include="OpenCvSharp4.Extensions" Version="4.13.0.20260627" />
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<PackageReference Include="OpenCvSharp4.official.runtime.linux-x64" Version="4.13.0.20260627" />
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<PackageReference Include="ZXing.Net" Version="0.16.11" />
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<PackageReference Include="ZXing.Net.Bindings.Windows.Compatibility" Version="0.16.14" />
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</ItemGroup>
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</Project>
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using OpenCvSharp;
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using ZXing;
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using ZXing.QrCode;
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using OpenCvSharp.Extensions;
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using ZXing.Windows.Compatibility;
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using ZXing.Common;
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using System.Runtime.InteropServices;
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using System.Drawing;
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using System.Net;
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// using Emgu.CV.CvEnum;
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namespace BarcodeReaderExample
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{
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class Program
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{
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static void Main(string[] args)
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{
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VideoCapture camera = new VideoCapture("/dev/video0", VideoCaptureAPIs.V4L2);
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if (!camera.IsOpened())
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throw new Exception("Nie można otworzyć kamery /dev/video0");
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camera.Set(VideoCaptureProperties.FrameWidth, 1280);
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camera.Set(VideoCaptureProperties.FrameHeight, 720);
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camera.Set(VideoCaptureProperties.Fps, 24);
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if(Directory.Exists("cache"))
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{
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Directory.Delete("cache",true);
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}
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Directory.CreateDirectory("cache");
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Mat hey = new Mat("photo.png");
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Mat[] Cached = new Mat[10];
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using var rgb = new Mat();
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// OpenCV stores camera frames as BGR.
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// ZXing's RGBLuminanceSource expects RGB.
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// Cv2.CvtColor(frame, rgb, ColorConversionCodes.BGR2RGB);
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Cv2.NamedWindow("Camera preview", WindowFlags.AutoSize);
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int photocount = 0;
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Mat src = Cv2.ImRead("test.png");
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string[] files = new string[10];
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int files_index =0;
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while (true)
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{
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// if (!camera.Read(frame) || frame.Empty())
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// {
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// Console.Error.WriteLine("Nie udało się odczytać klatki");
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// break;
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// }
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camera.Read(frame);
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Result result = GetResult(frame);
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if (result != null)
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{
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List<ResultPoint> points = result.ResultPoints.ToList();
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float[] pos1 = new float[2] { points[0].X, points[0].Y }; /// lewy dolny róg
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float[] pos2 = new float[2] { points[2].X, points[2].Y }; ///prawy górny róg
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float[] pos3 = new float[2] { points[1].X, points[1].Y }; ///lewy górny róg
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int width = (int)(pos2[0] - pos3[0]);
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int heigh = (int)(pos1[1] - pos3[1]);
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// Cv2.Circle(frame, (int)pos1[0], (int)pos1[1], 5, Scalar.Red, 2);
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// Cv2.Circle(frame, (int)pos2[0], (int)pos2[1], 5, Scalar.Green, 2);
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// Cv2.Circle(frame, (int)pos3[0], (int)pos3[1], 5, Scalar.Blue, 2);
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PointF[] location;
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try
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{
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location = Calculate(pos1, pos2, pos3, new float[2] { points[3].X, points[3].Y });
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}
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catch
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{
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continue;
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}
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// Mat roi = frame[new Rect((int)pos3[0],(int)pos3[1], src.Width+3, src.Height)];
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Mat roi = frame[new Rect((int)pos3[0], (int)pos3[1], width,heigh)];
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src.CopyTo(roi);
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// Console.WriteLine($"szerokość:{width}");
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// Console.WriteLine($"wysokosc:{heigh}");
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// Console.WriteLine($"x:{pos3[0]}");
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// Console.WriteLine($"y:{pos3[1]}");
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// DrawLine(location); //draw red squre
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var points1 = new List<OpenCvSharp.Point>
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{
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GetPoint(location[0]),
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GetPoint(location[1]),
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GetPoint(location[3]),
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GetPoint(location[2])
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};
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// Zagnieźdź w dodatkową kolekcję:
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IEnumerable<IEnumerable<OpenCvSharp.Point>> contours = new[] { points1 };
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// Cv2.FillPoly(frame, contours, Scalar.White); // fill with white
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Cv2.PutText(frame, result.Text, new OpenCvSharp.Point((int)(pos2[0]-pos3[0])/2+(int)pos3[0]-160, (int)(pos2[1]-pos3[1])/2+(int)pos3[1]+60), HersheyFonts.HersheySimplex, 0.8, Scalar.Black, 2);
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if (!files.Contains(result.Text))
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{
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files[files_index] = result.Text;
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Console.WriteLine("downloading: "+result.Text);
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using (var client = new WebClient())
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{
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client.DownloadFile(result.Text, "cache/"+files_index + ".png");
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// Thread.Sleep(2000);
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}
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Cached[files_index] = new Mat("cache/" + files_index + ".png");
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files_index++;
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}
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else
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{
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// try
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// {
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int toload = files.IndexOf(result.Text);
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Mat roi2 = frame[new Rect((int)pos3[0], (int)pos3[1], Cached[toload].Width, Cached[toload].Height)];
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Cached[toload].CopyTo(roi2);
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// Console.WriteLine("work");
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// }
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// catch { }
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}
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// Cv2.draw
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// Cv2.Circle(frame, (int)(RightBottomX), (int)(RightBottomY), 5, Scalar.Green, 2);
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//Cv2.Rectangle(frame, new Point((int)X, (int)Y), new Point ((int)Width, (int)Height), Scalar.Red, 2);
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// Console.WriteLine(result.Text);
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}
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// frame.SaveImage($"photos/photo_{photocount}.png");
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// photocount++;
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Cv2.ImShow("Camera preview", frame);
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Thread.Sleep(1000 / 24);
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// Console.WriteLine("tick");
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int key = Cv2.WaitKey(1);
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if (key == 27 || key == 'q')
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break;
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}
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Cv2.DestroyAllWindows();
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}
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static OpenCvSharp.Point GetPoint(PointF pointf)
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{
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return new OpenCvSharp.Point(pointf.X,pointf.Y);
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}
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static PointF[] Calculate(float[] pos1, float[] pos2, float[] pos3, float[] pos4)
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{
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// Your 4 detected points (change the names if needed)
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PointF p1 = new PointF(pos1[0], pos1[1]);
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PointF p2 = new PointF(pos2[0], pos2[1]);
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PointF p3 = new PointF(pos3[0], pos3[1]);
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PointF p4 = new PointF(pos4[0], pos4[1]);
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// 1. Find the center of the QR
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float centerX = (p1.X + p2.X + p3.X + p4.X) / 4f;
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float centerY = (p1.Y + p2.Y + p3.Y + p4.Y) / 4f;
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PointF center = new PointF(centerX, centerY);
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// 2. How much bigger you want the box (1.0 = exact size, 1.15 = 15% bigger)
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float scale = 1.35f; // ← change this value
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// 3. Move every corner away from the center
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PointF Expand(PointF p)
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{
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float dx = p.X - center.X;
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float dy = p.Y - center.Y;
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return new PointF(center.X + dx * scale, center.Y + dy * scale);
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}
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float scaleLB = 1.75f; // ← change this value
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PointF ExpandLB(PointF p)
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{
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float dx = p.X - center.X;
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float dy = p.Y - center.Y;
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return new PointF(center.X + dx * scaleLB, center.Y + dy * scaleLB);
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}
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PointF topLeft = Expand(p3); // change order if needed
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PointF topRight = Expand(p2);
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PointF bottomRight = ExpandLB(p4);
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PointF bottomLeft = Expand(p1);
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PointF[] Location = new PointF[] {topLeft,topRight,bottomLeft,bottomRight};
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return Location;
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// 4. Now draw the 4 lines
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// Example with System.Drawing or Unity or whatever you use:
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}
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static void DrawLine(PointF p1, PointF p2)
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{
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Cv2.Line(frame, (int)p1.X, (int)p1.Y, (int)p2.X, (int)p2.Y, Scalar.Red, 2);
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}
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static void DrawLine(PointF[] Location)
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{
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DrawLine(Location[0], Location[1]);
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DrawLine(Location[1], Location[2]);
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DrawLine(Location[2], Location[3]);
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DrawLine(Location[3], Location[0]);
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}
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static void DrawLine(float x1, float y1, float x2, float y2)
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{
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Cv2.Line(frame, (int)x1, (int)y1, (int)x2, (int)y2, Scalar.Red, 2);
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}
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static Mat frame = new Mat();
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static Result GetResult(Mat frame)
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{
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QRCodeReader reader = new QRCodeReader();
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Result result = reader.decode(MatToBinaryBitmap(frame));
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return result;
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}
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static BinaryBitmap MatToBinaryBitmap(Mat frame)
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{
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if (frame.Empty())
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throw new ArgumentException("The Mat is empty.", nameof(frame));
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using var rgb = new Mat();
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// OpenCV uses BGR; ZXing RGBLuminanceSource expects RGB.
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Cv2.CvtColor(
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frame,
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rgb,
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ColorConversionCodes.BGR2RGB
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);
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// Clone ensures contiguous pixel memory.
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using var contiguous = rgb.Clone();
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int width = contiguous.Width;
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int height = contiguous.Height;
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int byteCount = checked(
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(int)(contiguous.Total() * contiguous.ElemSize())
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);
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byte[] pixels = new byte[byteCount];
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Marshal.Copy(
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contiguous.Data,
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pixels,
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0,
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pixels.Length
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);
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var luminanceSource = new RGBLuminanceSource(
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pixels,
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width,
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height,
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RGBLuminanceSource.BitmapFormat.RGB24
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);
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return new BinaryBitmap(
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new HybridBinarizer(luminanceSource)
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);
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}
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}
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}
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