static void Main(string[] args)
{
using var straightQrCode = new Mat();
var qr = new QRCodeDetector();
var capture = new VideoCapture();
capture.Open(0);
using (var normalWindow = new Window("QRCode"))
{
var normalFrame = new Mat();
var srFrame = new Mat();
while (true)
{
capture.Read(normalFrame);
normalWindow.ShowImage(normalFrame);
var QRCodeContent = qr.DetectAndDecode(normalFrame, out var point);
if (QRCodeContent != "")
{
Console.WriteLine(QRCodeContent);
}
Cv2.WaitKey(500);
}
}
}
public void DetectAndDecode()
{
using var obj = new QRCodeDetector();
int x = 100;
int y = 200;
using var withQr = ImageWithQrCode(x, y, out int w, out int h);
ShowImagesWhenDebugMode(withQr);
using var straightQrCode = new Mat();
var decodedString = obj.DetectAndDecode(withQr, out var points, straightQrCode);
Assert.Equal(4, points.Length);
Assert.Equal(102, points[0].X);
Assert.Equal(201, points[0].Y);
Assert.Equal(199, points[1].X);
Assert.Equal(201, points[1].Y);
Assert.Equal(199, points[2].X);
Assert.Equal(299, points[2].Y);
Assert.Equal(102, points[3].X);
Assert.Equal(299, points[3].Y);
Assert.False(straightQrCode.Empty());
Assert.Equal("https://github.com/opencv/opencv", decodedString);
}
public static void QrCodeTest()
{
Glb.DrawMatAndHist0(Glb.matSrc);
var matGray = Glb.matSrc.CvtColor(ColorConversionCodes.BGR2GRAY);
Glb.DrawMatAndHist1(matGray);
QRCodeDetector detector = new QRCodeDetector();
Point2f[] points;
string text = detector.DetectAndDecode(matGray, out points);
Console.WriteLine("points : " + string.Join(",", points.Select(pt => pt.ToString())));
Console.WriteLine(text);
var matRet = matGray.CvtColor(ColorConversionCodes.GRAY2BGR);
var pts = points.Select(pt => new OpenCvSharp.Point(pt.X, pt.Y));
var ptss = Enumerable.Repeat(pts, 1);
matRet.Polylines(ptss, true, Scalar.Lime);
Glb.DrawMatAndHist2(matRet);
matGray.Dispose();
matRet.Dispose();
}
public void ExplicitlyDetectMulti()
{
using var obj = new QRCodeDetector();
using var withQr = Image("qr_multi.png");
using var pointsMat = new Mat();
ShowImagesWhenDebugMode(withQr);
bool detected = obj.DetectMulti(withQr, out var points);
Assert.True(detected);
Assert.Equal(8, points.Length);
var expectedPoints = new[]
{
new Point2f(39, 39),
new Point2f(260, 39),
new Point2f(260, 260),
new Point2f(39, 260),
new Point2f(334, 334),
new Point2f(565, 334),
new Point2f(565, 565),
new Point2f(334, 565),
};
AreEquivalent(expectedPoints, points);
}
public void ExplicitlyDetectAndDecode()
{
using var obj = new QRCodeDetector();
const int x = 100;
const int y = 200;
using var withQr = ImageWithQrCode(x, y, out var w, out var h);
using var pointsMat = new Mat();
ShowImagesWhenDebugMode(withQr);
bool detected = obj.Detect(withQr, out var points);
Assert.True(detected);
Assert.Equal(4, points.Length);
Assert.Equal(102, points[0].X, 6);
Assert.Equal(201, points[0].Y, 6);
Assert.Equal(199, points[1].X, 6);
Assert.Equal(201, points[1].Y, 6);
Assert.Equal(199, points[2].X, 6);
Assert.Equal(299, points[2].Y, 6);
Assert.Equal(102, points[3].X, 6);
Assert.Equal(299, points[3].Y, 6);
using var straightQrCode = new Mat();
obj.Decode(withQr, points);
var decodedString = obj.Decode(withQr, points, straightQrCode);
Assert.False(straightQrCode.Empty());
Assert.Equal("https://github.com/opencv/opencv", decodedString);
}
private string RecongizeQRCode(Mat mat)
{
Mat dstMat = new Mat();
QRCodeDetector QRdetecter = new QRCodeDetector();
bool res = QRdetecter.Detect(mat, dstMat); //检测
string str = QRdetecter.Decode(mat, dstMat); //解码
return(str);
}
public void DecodeMultibyteString()
{
using var obj = new QRCodeDetector();
using var withQr = Image("qr_multibyte_letters.png");
var decodedString = obj.DetectAndDecode(withQr, out var points);
Assert.Equal(4, points.Length);
Assert.Equal("Helloこんにちは你好안녕하세요", decodedString);
}
public void DecodeSinglebyteString()
{
using var obj = new QRCodeDetector();
using var withQr = Image("qr_singlebyte_letters.png");
var decodedString = obj.DetectAndDecode(withQr, out var points);
Assert.Equal(4, points.Length);
Assert.Equal("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[]^_`{|}", decodedString);
}
public void EmptyDetectMulti()
{
var lenna = Image("lenna.png");
using var obj = new QRCodeDetector();
bool detected = obj.DetectMulti(lenna, out var points);
Assert.False(detected);
Assert.Empty(points);
}
void OnNewSample(Frame frame)
{
if (isDetecting)
{
return;
}
using (var frameSet = frame.AsFrameSet())
{
using (var colorFrame = frameSet.ColorFrame)
{
if (colorFrame == null)
{
return;
}
// set isDetecting true to avoid crashes
isDetecting = true;
int cfWidth = colorFrame.Width;
int cfHeight = colorFrame.Height;
// transform realsense frame into cv mat format
using (var image = new Mat(cfHeight, cfWidth, MatType.CV_8UC3, colorFrame.Data))
{
using (qrCodeDetector = new QRCodeDetector())
{
// Show generated Image in separate window
// Window.ShowImages(image);
// check frame if qrcode is existing
bool detected = qrCodeDetector.Detect(image, out var points);
if (detected)
{
using (var straightQrCode = new Mat())
{
qrCodeDetector.Decode(image, points);
var decodedString = qrCodeDetector.Decode(image, points, straightQrCode);
if (!string.IsNullOrEmpty(decodedString))
{
if (decodedString == "tiger")
{
actionEventQueue.Enqueue("spawnTiger");
}
if (decodedString == "house")
{
actionEventQueue.Enqueue("spawnHouse");
}
}
}
}
isDetecting = false;
}
}
}
}
}
// Use this for initialization
void Start()
{
webCamTextureToMatHelper = gameObject.GetComponent <WebCamTextureToMatHelper>();
detector = new QRCodeDetector();
#if UNITY_ANDROID && !UNITY_EDITOR
// Avoids the front camera low light issue that occurs in only some Android devices (e.g. Google Pixel, Pixel2).
webCamTextureToMatHelper.avoidAndroidFrontCameraLowLightIssue = true;
#endif
webCamTextureToMatHelper.Initialize();
}
private void Run()
{
Texture2D imgTexture = Resources.Load("link_github_ocv") as Texture2D;
Mat imgMat = new Mat(imgTexture.height, imgTexture.width, CvType.CV_8UC4);
Utils.texture2DToMat(imgTexture, imgMat);
Debug.Log("imgMat.ToString() " + imgMat.ToString());
Mat grayMat = new Mat();
Imgproc.cvtColor(imgMat, grayMat, Imgproc.COLOR_RGBA2GRAY);
Mat points = new Mat();
Mat straight_qrcode = new Mat();
QRCodeDetector detector = new QRCodeDetector();
bool result = detector.detect(grayMat, points);
if (result)
{
string decode_info = detector.decode(grayMat, points, straight_qrcode);
Debug.Log(decode_info);
Debug.Log(points.dump());
Debug.Log(straight_qrcode.dump());
// draw QRCode contour.
float[] points_arr = new float[8];
points.get(0, 0, points_arr);
Imgproc.line(imgMat, new Point(points_arr [0], points_arr [1]), new Point(points_arr [2], points_arr [3]), new Scalar(255, 0, 0, 255), 2);
Imgproc.line(imgMat, new Point(points_arr [2], points_arr [3]), new Point(points_arr [4], points_arr [5]), new Scalar(255, 0, 0, 255), 2);
Imgproc.line(imgMat, new Point(points_arr [4], points_arr [5]), new Point(points_arr [6], points_arr [7]), new Scalar(255, 0, 0, 255), 2);
Imgproc.line(imgMat, new Point(points_arr [6], points_arr [7]), new Point(points_arr [0], points_arr [1]), new Scalar(255, 0, 0, 255), 2);
Imgproc.putText(imgMat, "DECODE INFO: " + decode_info, new Point(5, imgMat.rows() - 10), Imgproc.FONT_HERSHEY_SIMPLEX, 0.7, new Scalar(255, 255, 255, 255), 2, Imgproc.LINE_AA, false);
}
Texture2D texture = new Texture2D(imgMat.cols(), imgMat.rows(), TextureFormat.RGBA32, false);
Utils.matToTexture2D(imgMat, texture);
gameObject.GetComponent <Renderer> ().material.mainTexture = texture;
}
public static string DecodeQR(string inputImagePath)
{
Mat inputImage = new Mat(inputImagePath);
QRCodeDetector qrDecoder = new QRCodeDetector();
Point2f[] point2Fs;
string data = qrDecoder.DetectAndDecode(inputImage, out point2Fs);
if (data.Length > 0)
{
Display(inputImage, point2Fs, inputImagePath);
inputImage.Dispose();
qrDecoder.Dispose();
return(data);
}
else
{
throw new Exception("QR Not Found");
inputImage.Dispose();
qrDecoder.Dispose();
}
}
public void ExplicitlyDecodeMulti()
{
var expectedDecodedStrings = new[]
{
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[]^_`{|}",
"Helloこんにちは你好안녕하세요"
};
using var obj = new QRCodeDetector();
using var withQr = Image("qr_multi.png");
using var pointsMat = new Mat();
ShowImagesWhenDebugMode(withQr);
bool detected = obj.DetectMulti(withQr, out var points);
Assert.True(detected);
Assert.Equal(8, points.Length);
bool decoded = obj.DecodeMulti(withQr, points, out var decodedStrings, out var straightQrCode);
Assert.True(decoded);
Assert.Equal(2, decodedStrings.Length);
AreEquivalent(expectedDecodedStrings, decodedStrings);
foreach (var mat in straightQrCode)
{
ShowImagesWhenDebugMode(mat);
}
bool decodedWithoutStraightQrCode = obj.DecodeMulti(withQr, points, out decodedStrings);
Assert.True(decodedWithoutStraightQrCode);
Assert.Equal(2, decodedStrings.Length);
AreEquivalent(expectedDecodedStrings, decodedStrings);
}