private void differenceToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
List <string> list = new List <string>();
foreach (TreeNode item in treeView1.Nodes)
{
if (item.Checked)
{
list.Add(item.Text);
}
}
if (list.Count > 1)
{
var img = new Mat();
CvInvoke.AbsDiff(imgList[list[0]], imgList[list[1]], img);
AddImage(img.ToImage <Bgr, byte>(), "Difference");
pictureBox1.Image = img.ToBitmap();
}
else
{
MessageBox.Show("Select two images.");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public static Rectangle detect_blue_rectangle(Bitmap b1, Bitmap b2)
{
Rectangle ret = Rectangle.Empty;
Image <Bgr, Byte> img1 = new Image <Bgr, byte>(b1);
Image <Bgr, Byte> img2 = new Image <Bgr, byte>(b2);
Mat diff = new Mat();
CvInvoke.AbsDiff(img1, img2, diff);
Mat tmp = new Mat();
CvInvoke.CvtColor(diff, tmp, ColorConversion.Bgr2Gray);
CvInvoke.Threshold(tmp, diff, 0, 255, ThresholdType.Binary | ThresholdType.Otsu);
using (VectorOfVectorOfPoint contours = new VectorOfVectorOfPoint())
{
CvInvoke.FindContours(diff, contours, null, RetrType.External, ChainApproxMethod.ChainApproxNone);
int count = contours.Size;
double m = 0.0;
for (int i = 0; i < count; i++)
{
double d = CvInvoke.ContourArea(contours[i]);
if (d > m)
{
m = d;
ret = CvInvoke.BoundingRectangle(contours[i]);
}
}
}
Program.logIt(string.Format("detect_blue_rectangle: -- {0}", ret));
return(ret);
}
private static int[] GetAdjust(Image <Gray, byte> ImgCap, Image <Gray, byte> ImgGerber, int RangeX, int RangeY)
{
int x_ok = 0;
int y_ok = 0;
double diff = 2448 * 2018;
for (int x = -RangeX; x < RangeX; x++)
{
for (int y = -RangeY; y < RangeY; y++)
{
using (Image <Gray, byte> imgTransform = ImageProcessingUtils.ImageTransformation(ImgCap.Copy(), x, y))
{
CvInvoke.AbsDiff(imgTransform, ImgGerber, imgTransform);
int count = CvInvoke.CountNonZero(imgTransform);
if (count < diff)
{
diff = count;
x_ok = x;
y_ok = y;
}
}
}
}
return(new int[] { x_ok, y_ok });
}
/**********************************************************
* Frame processing using background subtraction and
* morphological operations, (sensitive to light)
**********************************************************/
private static void ProcessFrame(Mat backgroundFrame_l, Mat backgroundFrame_r, int threshold, int erodeIterations, int dilateIterations)
{
//Find difference between background(first) frame and current frame
CvInvoke.AbsDiff(backgroundFrame_l, rawFrame_l, diffFrame_l);
CvInvoke.AbsDiff(backgroundFrame_r, rawFrame_r, diffFrame_r);
//Apply binary threshold to grayscale image(white pixel will mark difference)
CvInvoke.CvtColor(diffFrame_l, grayscaleDiffFrame_l, ColorConversion.Bgr2Gray);
CvInvoke.CvtColor(diffFrame_r, grayscaleDiffFrame_r, ColorConversion.Bgr2Gray);
CvInvoke.Threshold(grayscaleDiffFrame_l, binaryDiffFrame_l, threshold, 255, ThresholdType.Binary);
CvInvoke.Threshold(grayscaleDiffFrame_r, binaryDiffFrame_r, threshold, 255, ThresholdType.Binary);
//Remove noise with opening operation(erosion followed by dilation)
CvInvoke.Erode(binaryDiffFrame_l, denoisedDiffFrame_l, null, new Point(-1, -1), erodeIterations, BorderType.Default, new MCvScalar(1));
CvInvoke.Erode(binaryDiffFrame_r, denoisedDiffFrame_r, null, new Point(-1, -1), erodeIterations, BorderType.Default, new MCvScalar(1));
CvInvoke.Dilate(denoisedDiffFrame_l, denoisedDiffFrame_l, null, new Point(-1, -1), dilateIterations, BorderType.Default, new MCvScalar(1));
CvInvoke.Dilate(denoisedDiffFrame_r, denoisedDiffFrame_r, null, new Point(-1, -1), dilateIterations, BorderType.Default, new MCvScalar(1));
rawFrame_l.CopyTo(finalFrame_l);
rawFrame_r.CopyTo(finalFrame_r);
left_camera = true;
DetectObject(denoisedDiffFrame_l, finalFrame_l);
left_camera = false;
DetectObject(denoisedDiffFrame_r, finalFrame_r);
}
public void TestConvolutionAndLaplace()
{
Mat image = new Mat(new Size(300, 400), DepthType.Cv8U, 1);
CvInvoke.Randu(image, new MCvScalar(0.0), new MCvScalar(255.0));
Mat laplacian = new Mat();
CvInvoke.Laplacian(image, laplacian, DepthType.Cv8U);
float[,] k = { { 0, 1, 0 },
{ 1, -4, 1 },
{ 0, 1, 0 } };
ConvolutionKernelF kernel = new ConvolutionKernelF(k);
Mat convoluted = new Mat(image.Size, DepthType.Cv8U, 1);
CvInvoke.Filter2D(image, convoluted, kernel, kernel.Center);
Mat absDiff = new Mat();
CvInvoke.AbsDiff(laplacian, convoluted, absDiff);
int nonZeroPixelCount = CvInvoke.CountNonZero(absDiff);
EmguAssert.IsTrue(nonZeroPixelCount == 0);
//Emgu.CV.UI.ImageViewer.Show(absDiff);
}
public void TestQuaternion3()
{
Random r = new Random();
Quaternions q1 = new Quaternions();
q1.AxisAngle = new MCvPoint3D64f(r.NextDouble(), r.NextDouble(), r.NextDouble());
Quaternions q2 = new Quaternions();
q2.AxisAngle = q1.AxisAngle;
double epsilon = 1.0e-8;
EmguAssert.IsTrue(Math.Abs(q1.W - q2.W) < epsilon);
EmguAssert.IsTrue(Math.Abs(q1.X - q2.X) < epsilon);
EmguAssert.IsTrue(Math.Abs(q1.Y - q2.Y) < epsilon);
EmguAssert.IsTrue(Math.Abs(q1.Z - q2.Z) < epsilon);
RotationVector3D rVec = new RotationVector3D(new double[] { q1.AxisAngle.X, q1.AxisAngle.Y, q1.AxisAngle.Z });
Mat m1 = rVec.RotationMatrix;
Matrix <double> m2 = new Matrix <double>(3, 3);
q1.GetRotationMatrix(m2);
Matrix <double> diff = new Matrix <double>(3, 3);
CvInvoke.AbsDiff(m1, m2, diff);
double norm = CvInvoke.Norm(diff, Emgu.CV.CvEnum.NormType.C);
EmguAssert.IsTrue(norm < epsilon);
Quaternions q4 = q1 * Quaternions.Empty;
//EmguAssert.IsTrue(q4.Equals(q1));
}
static ContourProperties FishContour(Mat image_raw, Mat background)
{
bool fishcont_found = false;
Size frsize = new Size(image_raw.Width, image_raw.Height);
Mat image = new Mat(frsize, Emgu.CV.CvEnum.DepthType.Cv8U, 1);
ContourProperties contprops = new ContourProperties();
ThresholdType ttype = 0;
VectorOfVectorOfPoint contours = new VectorOfVectorOfPoint();
Mat hierarchy = new Mat();
CvInvoke.AbsDiff(image_raw, background, image);
// This should be 30 as the LB. Switched to 20 to see if i could pick up paramecia.
CvInvoke.Threshold(image, image, 10, 255, ttype);
// UNCOMMENT IF YOU WANT TO SHOW THRESHOLDED IMAGE
String camerawindow = "Camera Window";
CvInvoke.NamedWindow(camerawindow);
CvInvoke.Imshow(camerawindow, image);
CvInvoke.WaitKey(1);
CvInvoke.FindContours(image, contours, hierarchy, RetrType.External, ChainApproxMethod.ChainApproxNone);
int fish_contour_index = 0;
Rectangle bounding_rect = new Rectangle();
for (int ind = 0; ind < contours.Size; ind++)
{
bounding_rect = CvInvoke.BoundingRectangle(contours[ind]);
if (bounding_rect.Width > bounding_rect.Height)
{
contprops.height = bounding_rect.Width;
}
else
{
contprops.height = bounding_rect.Height;
}
if (contprops.height < 50 && contprops.height > 25)
{
fish_contour_index = ind;
fishcont_found = true;
break;
}
}
if (fishcont_found)
{
var contourCenter = new Point();
var contourCOM = new Point();
MCvMoments com = new MCvMoments();
com = CvInvoke.Moments(contours[fish_contour_index]);
contourCOM.X = (int)(com.M10 / com.M00);
contourCOM.Y = (int) (com.M01 / com.M00);
contourCenter.X = (int)(bounding_rect.X + (float)bounding_rect.Width / (float)2);
contourCenter.Y = (int)(bounding_rect.Y + (float)bounding_rect.Height / (float)2);
contprops.center = contourCenter;
contprops.com = contourCOM;
}
else
{
Console.WriteLine(contprops.com);
Console.WriteLine(contprops.height);
Console.WriteLine("no contours");
}
return contprops;
}
public static void AbsDiff(this Mat mat, double value)
{
Mat op = new Mat(mat.Size, mat.Depth, mat.NumberOfChannels);
op.SetTo(new MCvScalar(value));
CvInvoke.AbsDiff(mat, op, mat);
op.Dispose();
}
public static Mat Abs(Mat mat)
{
Mat copy = new Mat();
var zeros = Mat.Zeros(mat.Height, mat.Width, mat.Depth, mat.NumberOfChannels);
CvInvoke.AbsDiff(mat, zeros, copy);
return(copy);
}
void Process()
{
while (!stop)
{
// read frame by frame from video or camera
cam = cap.QueryFrame();
// end of video
if (cam == null)
{
break;
}
CvInvoke.Resize(cam, cam, new Size(640, 480));
try
{
// convert color from BGR to Gray image
CvInvoke.CvtColor(cam, gray, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
// blur it
CvInvoke.GaussianBlur(gray, gray, new Size(21, 21), 0);
//CvInvoke.Imshow("gray", gray);
// if first frame is null meaning it's first frame of video
if (firstFrame == null)
{
//clone from gray frame
firstFrame = gray.Clone();
frameDelta = firstFrame.Clone();
//CvInvoke.Imshow("firstFrame", firstFrame);
continue;
}
// every frame change, compair with first frame, if there is difference between them, save it to frame delta
CvInvoke.AbsDiff(gray, firstFrame, frameDelta);
//CvInvoke.Imshow("frameDelta", frameDelta);
// threshold frame delta
CvInvoke.Threshold(frameDelta, thresh, 25, 255, Emgu.CV.CvEnum.ThresholdType.Binary);
Morphops(thresh);
//CvInvoke.Imshow("thresh", thresh);
// find contours from thresh image
findContours(thresh, cam);
}
catch (Exception)
{
}
CvInvoke.Imshow("Cam", cam);
CvInvoke.WaitKey(33);
}
}
private void buttonDifference_Click(object sender, EventArgs e)
{
if (imageConverted.Data != null)
{
imageDifference = new Image <Gray, byte>(imageOriginal.Cols, imageOriginal.Rows);
CvInvoke.AbsDiff(imageZoomed, imageConverted, imageDifference);
imageBox2.Image = imageDifference;
}
}
private Mat DetectPen()
{
if (capture == null)
{
return(null);
}
Mat m = new Mat();
Mat n = new Mat();
Mat o = new Mat();
Mat binaryDiffFrame = new Mat();
Mat denoisedDiffFrame = new Mat();
Mat finalFrame = new Mat();
Rectangle cropbox = new Rectangle();
capture.Read(m);
if (!m.IsEmpty)
{
Image <Bgr, byte> ret = m.ToImage <Bgr, byte>();
Image <Bgr, byte> img = m.ToImage <Bgr, byte>();
var image = img.InRange(new Bgr(blue1, green1, red1), new Bgr(blue2, green2, red2));
var mat = img.Mat;//nueva matriz igual a la anterior
mat.SetTo(new MCvScalar(0, 0, 255), image);
mat.CopyTo(ret);
Image <Bgr, byte> imgout = ret.CopyBlank();//imagen sin fondo negro
imgout._Or(img);
CvInvoke.AbsDiff(m, imgout, n);
// Aplica limite binario a la imagen en escala de grises (white pixels marcan la diferencia)
CvInvoke.CvtColor(n, o, ColorConversion.Bgr2Gray);
CvInvoke.Threshold(o, binaryDiffFrame, 5, 255, ThresholdType.Binary);// 5 determina el límite del brillo al convertir la imagen de escala de grises a imagen binaria (blanco y negro)
// Remueve ruido con la operacion opening (eronde seguida de dilate)
CvInvoke.Erode(binaryDiffFrame, denoisedDiffFrame, null, new Point(-1, -1), ErodeIterations, BorderType.Default, new MCvScalar(1));
CvInvoke.Dilate(denoisedDiffFrame, denoisedDiffFrame, null, new Point(-1, -1), DilateIterations, BorderType.Default, new MCvScalar(1));
m.CopyTo(finalFrame);
m.Dispose();
n.Dispose();
o.Dispose();
binaryDiffFrame.Dispose();
return(DetectObject(denoisedDiffFrame, finalFrame, cropbox));
}
else
{
// break;
}
return(null);
}
private void preencherImagemBinariaSemPlanoDeFundo()
{
mCopiaImagemPlanoDeFundo = mImagemDoPlanoDeFundo.Clone();
CvInvoke.AbsDiff(mImagemColorida, mCopiaImagemPlanoDeFundo, mImagemSemPlanoDeFundo);
CvInvoke.CvtColor(mImagemSemPlanoDeFundo, mImagemCinzaSemPlanoDeFundo, ColorConversion.Rgb2Gray);
// CvInvoke.Threshold(mImagemCinzaSemPlanoDeFundo, mImagemBinariaSemPlanoDeFundo, ParametrosConstantes.LimiarTransformacaoParaCinza,
//ParametrosConstantes.MaximoLimiarTransformacaoParaCinza, ThresholdType.Binary);
CvInvoke.AdaptiveThreshold(mImagemCinzaSemPlanoDeFundo, mImagemBinariaSemPlanoDeFundo, ParametrosConstantes.MaximoLimiarTransformacaoParaCinza,
AdaptiveThresholdType.GaussianC, ThresholdType.Binary, 11, 3);
}
public void TestOclPyr()
{
if (!CvInvoke.HaveOpenCL)
{
return;
}
Image <Gray, Byte> img = new Image <Gray, byte>(640, 480);
//add some randome noise to the image
img.SetRandUniform(new MCvScalar(), new MCvScalar(255, 255, 255));
Image <Gray, Byte> down = img.PyrDown();
//Emgu.CV.UI.ImageViewer.Show(down);
Image <Gray, Byte> up = down.PyrUp();
UMat gImg = img.ToUMat();
UMat gDown = new UMat();
UMat gUp = new UMat();
CvInvoke.PyrDown(gImg, gDown);
CvInvoke.PyrUp(gDown, gUp);
CvInvoke.AbsDiff(down, gDown.ToImage <Gray, Byte>(), down);
CvInvoke.AbsDiff(up, gUp.ToImage <Gray, Byte>(), up);
double[] minVals, maxVals;
Point[] minLocs, maxLocs;
down.MinMax(out minVals, out maxVals, out minLocs, out maxLocs);
double maxVal = 0.0;
for (int i = 0; i < maxVals.Length; i++)
{
if (maxVals[i] > maxVal)
{
maxVal = maxVals[i];
}
}
Trace.WriteLine(String.Format("Max diff: {0}", maxVal));
EmguAssert.IsTrue(maxVal <= 1.0);
//Assert.LessOrEqual(maxVal, 1.0);
up.MinMax(out minVals, out maxVals, out minLocs, out maxLocs);
maxVal = 0.0;
for (int i = 0; i < maxVals.Length; i++)
{
if (maxVals[i] > maxVal)
{
maxVal = maxVals[i];
}
}
Trace.WriteLine(String.Format("Max diff: {0}", maxVal));
EmguAssert.IsTrue(maxVal <= 1.0);
//Assert.LessOrEqual(maxVal, 1.0);
}
public void TestQuaternions1()
{
Quaternions q = new Quaternions();
double epsilon = 1.0e-10;
Matrix <double> point = new Matrix <double>(3, 1);
point.SetRandNormal(new MCvScalar(), new MCvScalar(20));
using (Matrix <double> pt1 = new Matrix <double>(3, 1))
using (Matrix <double> pt2 = new Matrix <double>(3, 1))
using (Matrix <double> pt3 = new Matrix <double>(3, 1))
{
double x1 = 1.0, y1 = 0.2, z1 = 0.1;
double x2 = 0.0, y2 = 0.0, z2 = 0.0;
q.SetEuler(x1, y1, z1);
q.GetEuler(ref x2, ref y2, ref z2);
EmguAssert.IsTrue(
Math.Abs(x2 - x1) < epsilon &&
Math.Abs(y2 - y1) < epsilon &&
Math.Abs(z2 - z1) < epsilon);
q.RotatePoints(point, pt1);
Matrix <double> rMat = new Matrix <double>(3, 3);
q.GetRotationMatrix(rMat);
CvInvoke.Gemm(rMat, point, 1.0, null, 0.0, pt2, Emgu.CV.CvEnum.GemmType.Default);
CvInvoke.AbsDiff(pt1, pt2, pt3);
EmguAssert.IsTrue(
pt3[0, 0] < epsilon &&
pt3[1, 0] < epsilon &&
pt3[2, 0] < epsilon);
}
double rotationAngle = 0.2;
q.SetEuler(rotationAngle, 0.0, 0.0);
EmguAssert.IsTrue(Math.Abs(q.RotationAngle - rotationAngle) < epsilon);
q.SetEuler(0.0, rotationAngle, 0.0);
EmguAssert.IsTrue(Math.Abs(q.RotationAngle - rotationAngle) < epsilon);
q.SetEuler(0.0, 0.0, rotationAngle);
EmguAssert.IsTrue(Math.Abs(q.RotationAngle - rotationAngle) < epsilon);
q = q * q;
EmguAssert.IsTrue(Math.Abs(q.RotationAngle / 2.0 - rotationAngle) < epsilon);
q.SetEuler(0.2, 0.1, 0.05);
double t = q.RotationAngle;
q = q * q;
EmguAssert.IsTrue(Math.Abs(q.RotationAngle / 2.0 - t) < epsilon);
}
public void TestKMeans()
{
int clustersCount = 5;
int sampleCount = 300;
int imageSize = 500;
Bgr[] colors = new Bgr[]
{
new Bgr(0, 0, 255),
new Bgr(0, 255, 0),
new Bgr(255, 100, 100),
new Bgr(255, 0, 255),
new Bgr(0, 255, 255)
};
Image <Bgr, Byte> image = new Image <Bgr, byte>(imageSize, imageSize);
#region generate random samples
Matrix <float> points = new Matrix <float>(sampleCount, 1, 2);
Matrix <int> clusters = new Matrix <int>(sampleCount, 1);
Random r = new Random();
for (int i = 0; i < clustersCount; i++)
{
Matrix <float> row = points.GetRows(i * (sampleCount / clustersCount),
(i + 1) * (sampleCount / clustersCount), 1);
row.SetRandNormal(new MCvScalar(r.Next() % imageSize, r.Next() % imageSize),
new MCvScalar((r.Next() % imageSize) / 6, (r.Next() % imageSize) / 6));
}
using (ScalarArray ia = new ScalarArray(new MCvScalar()))
{
CvInvoke.AbsDiff(points, ia, points);
}
CvInvoke.RandShuffle(points, 1.0, 0);
#endregion
CvInvoke.Kmeans(
points,
2,
clusters,
new MCvTermCriteria(10, 1.0),
5,
CvEnum.KMeansInitType.PPCenters);
for (int i = 0; i < sampleCount; i++)
{
PointF p = new PointF(points.Data[i, 0], points.Data[i, 1]);
image.Draw(new CircleF(p, 1.0f), colors[clusters[i, 0]], 1);
}
//Emgu.CV.UI.ImageViewer.Show(image);
}
/*
* private bool IsMatch(IScreenshot screenshot, Mat reference, double threshold)
* {
* var result = new Mat();
*
* CvInvoke.AbsDiff(screenshot.Image, reference, result);
* var mean = CvInvoke.Mean(result);
*
* return mean.V0 <= threshold * 255;
* }
*/
private bool IsMatch(IScreenshot screenshot, Mat reference, Rectangle roi, double threshold)
{
var result = new Mat();
var screenshotRoi = new Mat(screenshot.Image, roi);
var referenceRoi = new Mat(reference, roi);
CvInvoke.AbsDiff(screenshotRoi, referenceRoi, result);
var mean = CvInvoke.Mean(result);
return(mean.V0 <= threshold * 255);
}
private void Compare(Mat image1, Mat image2)
{
using (var difImage = new Mat())
{
CvInvoke.AbsDiff(image1, image2, difImage);
var viewer = new ImageViewer();
viewer.Image = difImage;
// viewer.ShowDialog();
}
}
void Process()
{
thresh = gray = new Mat();
while (true)
{
cam = cap.QueryFrame();
//if cam = null it's mean end of the video
if (cam == null)
{
break;
}
try
{
//convert frame from BGR to Gray
CvInvoke.CvtColor(cam, gray, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
//blur it
CvInvoke.GaussianBlur(gray, gray, new Size(21, 21), 0);
//show gray frame
CvInvoke.Imshow("gray", gray);
//firstFrame is first frame of video, if it is null,
if (firstFrame == null)
{
firstFrame = gray.Clone();
frameDelta = firstFrame.Clone();
continue;
}
CvInvoke.AbsDiff(gray, firstFrame, frameDelta);
CvInvoke.Imshow("frameDelta", frameDelta);
CvInvoke.Threshold(frameDelta, thresh, 25, 255, Emgu.CV.CvEnum.ThresholdType.Binary);
Morphops(thresh);
CvInvoke.Imshow("thresh", thresh);
findContours(thresh, cam);
}
catch (Exception)
{
}
CvInvoke.Imshow("Cam", cam);
CvInvoke.WaitKey(33);
}
}
public void TestCudaPyr()
{
if (!CudaInvoke.HasCuda)
{
return;
}
Image <Gray, Byte> img = new Image <Gray, byte>(640, 480);
img.SetRandUniform(new MCvScalar(), new MCvScalar(255, 255, 255));
Image <Gray, Byte> down = img.PyrDown();
Image <Gray, Byte> up = down.PyrUp();
CudaImage <Gray, Byte> gImg = new CudaImage <Gray, byte>(img);
CudaImage <Gray, Byte> gDown = new CudaImage <Gray, byte>(img.Size.Width >> 1, img.Size.Height >> 1);
CudaImage <Gray, Byte> gUp = new CudaImage <Gray, byte>(img.Size);
CudaInvoke.PyrDown(gImg, gDown, null);
CudaInvoke.PyrUp(gDown, gUp, null);
CvInvoke.AbsDiff(down, gDown.ToImage(), down);
CvInvoke.AbsDiff(up, gUp.ToImage(), up);
double[] minVals, maxVals;
Point[] minLocs, maxLocs;
down.MinMax(out minVals, out maxVals, out minLocs, out maxLocs);
double maxVal = 0.0;
for (int i = 0; i < maxVals.Length; i++)
{
if (maxVals[i] > maxVal)
{
maxVal = maxVals[i];
}
}
Trace.WriteLine(String.Format("Max diff: {0}", maxVal));
EmguAssert.IsTrue(maxVal <= 1.0);
//Assert.LessOrEqual(maxVal, 1.0);
up.MinMax(out minVals, out maxVals, out minLocs, out maxLocs);
maxVal = 0.0;
for (int i = 0; i < maxVals.Length; i++)
{
if (maxVals[i] > maxVal)
{
maxVal = maxVals[i];
}
}
Trace.WriteLine(String.Format("Max diff: {0}", maxVal));
EmguAssert.IsTrue(maxVal <= 1.0);
//Assert.LessOrEqual(maxVal, 1.0);
}
static ContourProperties LargestContour(Mat image_raw, Mat background, bool draw)
{
Size frsize = new Size(image_raw.Width, image_raw.Height);
Mat image = new Mat(frsize, Emgu.CV.CvEnum.DepthType.Cv8U, 1);
ContourProperties contprops = new ContourProperties();
ThresholdType ttype = 0;
VectorOfVectorOfPoint contours = new VectorOfVectorOfPoint();
Mat hierarchy = new Mat();
CvInvoke.AbsDiff(image_raw, background, image);
CvInvoke.Threshold(image, image, 35, 255, ttype);
CvInvoke.FindContours(image, contours, hierarchy, RetrType.External, ChainApproxMethod.ChainApproxNone);
double largest_area = 0;
int largest_area_index = 0;
for (int ind = 0; ind < contours.Size; ind++)
{
double area = CvInvoke.ContourArea(contours[ind]);
if (area > largest_area)
{
if (image_raw.Width > 1000 && contours[ind][0].Y < 100) // prevents stim LED from being caught as a contour
{
continue;
}
largest_area = area;
largest_area_index = ind;
}
}
var contourCenter = new Point();
if (contours.Size > 0)
{
Rectangle bounding_rect = CvInvoke.BoundingRectangle(contours[largest_area_index]);
contourCenter.X = (int)(bounding_rect.X + (float)bounding_rect.Width / (float)2);
contourCenter.Y = (int)(bounding_rect.Y + (float)bounding_rect.Height / (float)2);
contprops.center = contourCenter;
contprops.height = bounding_rect.Height;
if (draw)
{
CvInvoke.DrawContours(image_raw, contours, largest_area_index, new MCvScalar(255, 0, 0), 2); // these are correct.
CvInvoke.Rectangle(image_raw, bounding_rect, new MCvScalar(255, 0, 0));
CvInvoke.Circle(image_raw, contourCenter, 50, new MCvScalar(255, 0, 0)); // THIS IS ABOUT 50 PIXELS TOO HIGH
}
}
else
{
// Console.WriteLine("no contours");
}
return(contprops);
}
public static double comparePixel(Image <Bgr, byte> img1, Image <Bgr, byte> img2, double tanhScale = 0.01f)
{
Size midSize = new Size((img1.Width + img2.Width) / 2, (img1.Height + img2.Height) / 2);
img1 = img1.Resize(midSize.Width, midSize.Height, Emgu.CV.CvEnum.Inter.Linear);
img2 = img2.Resize(midSize.Width, midSize.Height, Emgu.CV.CvEnum.Inter.Linear);
Mat diffMat = new Mat();
CvInvoke.AbsDiff(img1, img2, diffMat);
MCvScalar diffSum = CvInvoke.Sum(diffMat);
double x = (diffSum.V0 + diffSum.V1 + diffSum.V2) / 3.0 / (midSize.Width * midSize.Height);
return(1 - Math.Tanh(tanhScale * x));
}
/// <summary>
/// Compare two images - return the percentage the images match
/// </summary>
public static double CompareImages(Image <Bgr, byte> firstImage, Mat secondImage)
{
using (Image <Bgr, byte> diffImage = new Image <Bgr, byte>(firstImage.Size))
{
// OpenCV method to produce an image which is the difference of the 2.
CvInvoke.AbsDiff(firstImage, secondImage, diffImage);
// Threshold to filter out pixels that are basically a match.
// Count remaining black pixels.
var nonZeroPixels = diffImage.ThresholdBinary(new Bgr(20, 20, 20), new Bgr(255d, 255d, 255d)).CountNonzero().Average();
// Divide by total pixels in resolution for total percentage images match
return(1 - (nonZeroPixels / (firstImage.Height * firstImage.Width)));
}
}
public void TestMatrixSubtract()
{
Matrix <float> f = new Matrix <float>(600, 480);
//set the value to 300
f.SetValue(new MCvScalar(300));
f -= 10;
using (ScalarArray sa = new ScalarArray(290))
using (Mat absDiff = new Mat())
{
//calculate the different of the value in f mat with 290
CvInvoke.AbsDiff(f, sa, absDiff);
int nonZeroCount = CvInvoke.CountNonZero(absDiff);
//Console.WriteLine(String.Format("number of elements that is not 290: {0}", nonZeroCount));
}
}
public Camera()
{
InitializeComponent();
Capture cap = new Capture();
contours = new List <Mat>();
while (true)
{
cam = cap.QueryFrame();
if (cam.IsEmpty)
{
break;
}
thresh = cam;
try
{
CvInvoke.CvtColor(cam, gray, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
CvInvoke.GaussianBlur(gray, gray, new Size(640, 480), 20);
CvInvoke.AbsDiff(firstFrame, gray, frameDelta);
CvInvoke.Threshold(frameDelta, thresh, 25, 255, Emgu.CV.CvEnum.ThresholdType.Binary);
//CvInvoke.Dilate(thresh, thresh, null, new Point(-1, -1), 2, Emgu.CV.CvEnum.BorderType.Default,new MCvScalar(0));
//CvInvoke.FindContours(thresh.Clone(),contours,)
}
catch (Exception)
{
}
if (firstFrame == null)
{
firstFrame = gray;
}
CvInvoke.Imshow("thresh", thresh);
CvInvoke.Imshow("Cam", cam);
CvInvoke.WaitKey(33);
}
}
private void ProcessFrame(object sender, EventArgs arg)
{
frame_in = cam.QueryFrame();
if (flag_motion)
{
frame_copy = frame_in.Clone();
CvInvoke.CvtColor(frame_copy, frame_gray, ColorConversion.Bgr2Gray);
CvInvoke.AbsDiff(frame_gray, frame_gray_prev, frame_difference);
frame_gray_prev.Dispose();
frame_gray_prev = frame_gray.Clone();
CvInvoke.Threshold(frame_difference, frame_difference, canny_th1, canny_th2, ThresholdType.Binary);
CvInvoke.GaussianBlur(frame_difference, frame_difference, new Size(blur_size, blur_size), blur_x, blur_x);
CvInvoke.Threshold(frame_difference, frame_difference, canny_th1, canny_th2, ThresholdType.Binary);
if (erosion_size > 0)
{
CvInvoke.Erode(frame_difference, frame_difference, element_erode, new Point(1, 1), 1, BorderType.Default, new MCvScalar(0));
}
if (dilation_size > 0)
{
CvInvoke.Dilate(frame_difference, frame_difference, element_dilate, new Point(1, 1), 1, BorderType.Default, new MCvScalar(0));
}
Image <Bgr, Byte> frame_display = frame_difference.ToImage <Bgr, Byte>();
frame_copy.Dispose();
if (imageBox1.Image != null)
{
imageBox1.Image.Dispose();
}
imageBox1.Image = frame_display;
// frame_display.Dispose();
}
else
{
if (imageBox1.Image != null)
{
imageBox1.Image.Dispose();
}
imageBox1.Image = frame_in;
}
}
public static double GetDifference(Mat mat1, Mat mat2, Mat? mask = null)
{
if (mask != null && !mask.IsEmpty)
{
var mat1Masked = new Mat();
mat1.CopyTo(mat1Masked, mask);
mat1 = mat1Masked;
var mat2Masked = new Mat();
mat2.CopyTo(mat2Masked, mask);
mat2 = mat2Masked;
}
var foreground = new Mat();
CvInvoke.AbsDiff(mat1, mat2, foreground);
return CvInvoke.Mean(foreground).V0;
}
double Similar(ref Mat src, ref Mat src2)
{
Matrix <Byte> matrix = new Matrix <Byte>(src.Rows, src.Cols, src.NumberOfChannels);
src.CopyTo(matrix);
Mat gray1 = new Mat(),
gray2 = new Mat();
CvInvoke.CvtColor(src, gray1, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
CvInvoke.CvtColor(src2, gray2, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
var size = new Size(Math.Max(src.Width, src2.Width), Math.Max(src.Height, src2.Height));
CvInvoke.Resize(gray1, gray1, size);
CvInvoke.Resize(gray2, gray2, size);
using (var scaledImg1 = gray1)
using (var scaledImg2 = gray2)
{
int threshold = 230;
CvInvoke.Threshold(scaledImg1, scaledImg1, threshold, 255, ThresholdType.Binary);
CvInvoke.Threshold(scaledImg2, scaledImg2, threshold, 255, ThresholdType.Binary);
//CvInvoke.CalcHist()
Mat res = new Mat();
CvInvoke.AbsDiff(scaledImg1, scaledImg2, res);
CvInvoke.Imshow("第一张", scaledImg1);
CvInvoke.Imshow("第二张", scaledImg2);
//Mat mat1 = scaledImg1.Row(0);
//Mat mat2 = scaledImg2.Col(0);
//var r1 = CvInvoke.CompareHist(scaledImg1, scaledImg2, HistogramCompMethod.Correl);
CvInvoke.Imshow("res", res);
//var all = 1;// Convert.ToDouble( CvInvoke.Sum(scaledImg1));
var sum1 = CvInvoke.Sum(scaledImg1);
var sum = CvInvoke.Sum(res);
var result = (1 - sum.V0 / sum1.V0);
Console.WriteLine("result:" + result);
return(result);
}
}
static List <ContourProperties> BarrierLocations(Mat image_raw, Mat background)
{
int minArea = 1000;
int maxArea = 600000;
Size frsize = new Size(image_raw.Width, image_raw.Height);
Mat image = new Mat(frsize, Emgu.CV.CvEnum.DepthType.Cv8U, 1);
ThresholdType ttype = 0;
VectorOfVectorOfPoint contours = new VectorOfVectorOfPoint();
List <VectorOfPoint> contlist = new List <VectorOfPoint>();
List <ContourProperties> cp_list = new List <ContourProperties>();
Mat hierarchy = new Mat();
CvInvoke.AbsDiff(image_raw, background, image);
CvInvoke.Threshold(image, image, 50, 255, ttype);
CvInvoke.FindContours(image, contours, hierarchy, RetrType.External, ChainApproxMethod.ChainApproxNone);
Point contourCenter = new Point();
for (int ind = 0; ind < contours.Size; ind++)
{
double area = CvInvoke.ContourArea(contours[ind]);
if (area > minArea && area < maxArea)
{
contlist.Add(contours[ind]);
}
}
for (int contind = 0; contind < contlist.Count; contind++)
{
ContourProperties contprops = new ContourProperties();
Rectangle bounding_rect = CvInvoke.BoundingRectangle(contlist[contind]);
contourCenter.X = (int)(bounding_rect.X + (float)bounding_rect.Width / (float)2);
contourCenter.Y = (int)(bounding_rect.Y + (float)bounding_rect.Height / (float)2);
contprops.center = contourCenter;
contprops.height = bounding_rect.Height;
cp_list.Add(contprops);
}
return(cp_list);
}
public static Bitmap extract_different_mask(Bitmap b1, Bitmap b2)
{
Bitmap ret = null;
Image <Gray, Byte> img1 = new Image <Gray, byte>(b1);
Image <Gray, Byte> img2 = new Image <Gray, byte>(b2);
Mat diff = new Mat();
CvInvoke.AbsDiff(img1, img2, diff);
Mat tmp = new Mat();
CvInvoke.Threshold(diff, tmp, 0, 255, ThresholdType.Binary | ThresholdType.Otsu);
diff = tmp;
using (VectorOfVectorOfPoint contours = new VectorOfVectorOfPoint())
{
CvInvoke.FindContours(diff, contours, null, RetrType.External, ChainApproxMethod.ChainApproxNone);
int count = contours.Size;
double m = 0.0;
int idx = -1;
for (int i = 0; i < count; i++)
{
double d = CvInvoke.ContourArea(contours[i]);
if (d > m)
{
m = d;
idx = i;
}
}
if (idx >= 0)
{
tmp = Mat.Ones(img2.Mat.Rows, img2.Mat.Cols, img2.Mat.Depth, img2.Mat.NumberOfChannels);
VectorOfVectorOfPoint vvp = new VectorOfVectorOfPoint();
vvp.Push(contours[idx]);
CvInvoke.FillPoly(tmp, vvp, new MCvScalar(255));
CvInvoke.CvtColor(tmp, diff, ColorConversion.Gray2Bgr);
ret = diff.Bitmap;
}
}
return(ret);
}
