public void OnCameraViewStarted(int width, int height)
{
mIntermediateMat = new Mat();
mSize0 = new Size();
mChannels = new MatOfInt[] { new MatOfInt(0), new MatOfInt(1), new MatOfInt(2) };
mBuff = new float[mHistSizeNum];
mHistSize = new MatOfInt(mHistSizeNum);
mRanges = new MatOfFloat(0f, 256f);
mMat0 = new Mat();
mColorsRGB = new Scalar[] { new Scalar(200, 0, 0, 255), new Scalar(0, 200, 0, 255), new Scalar(0, 0, 200, 255) };
mColorsHue = new Scalar[] {
new Scalar(255, 0, 0, 255), new Scalar(255, 60, 0, 255), new Scalar(255, 120, 0, 255), new Scalar(255, 180, 0, 255), new Scalar(255, 240, 0, 255),
new Scalar(215, 213, 0, 255), new Scalar(150, 255, 0, 255), new Scalar(85, 255, 0, 255), new Scalar(20, 255, 0, 255), new Scalar(0, 255, 30, 255),
new Scalar(0, 255, 85, 255), new Scalar(0, 255, 150, 255), new Scalar(0, 255, 215, 255), new Scalar(0, 234, 255, 255), new Scalar(0, 170, 255, 255),
new Scalar(0, 120, 255, 255), new Scalar(0, 60, 255, 255), new Scalar(0, 0, 255, 255), new Scalar(64, 0, 255, 255), new Scalar(120, 0, 255, 255),
new Scalar(180, 0, 255, 255), new Scalar(255, 0, 255, 255), new Scalar(255, 0, 215, 255), new Scalar(255, 0, 85, 255), new Scalar(255, 0, 0, 255)
};
mWhilte = Scalar.All(255);
mP1 = new Point();
mP2 = new Point();
// Fill sepia kernel
mSepiaKernel = new Mat(4, 4, CvType.Cv32f);
mSepiaKernel.Put(0, 0, /* R */ 0.189f, 0.769f, 0.393f, 0f);
mSepiaKernel.Put(1, 0, /* G */ 0.168f, 0.686f, 0.349f, 0f);
mSepiaKernel.Put(2, 0, /* B */ 0.131f, 0.534f, 0.272f, 0f);
mSepiaKernel.Put(3, 0, /* A */ 0.000f, 0.000f, 0.000f, 1f);
}
public void OnCameraViewStarted(int width, int height)
{
mRgba = new Mat(height, width, CvType.Cv8uc4);
mDetector = new ColorBlobDetector();
mSpectrum = new Mat();
mBlobColorRgba = new Scalar(255);
mBlobColorHsv = new Scalar(255);
SPECTRUM_SIZE = new Size(200, 64);
CONTOUR_COLOR = new Scalar(255, 0, 0, 255);
}
public CameraCalibrator(int width, int height)
{
mImageSize = new Size(width, height);
mFlags = Calib3d.CalibFixPrincipalPoint +
Calib3d.CalibZeroTangentDist +
Calib3d.CalibFixAspectRatio +
Calib3d.CalibFixK4 +
Calib3d.CalibFixK5;
Mat.Eye(3, 3, CvType.Cv64fc1).CopyTo(mCameraMatrix);
mCameraMatrix.Put(0, 0, 1.0);
Mat.Zeros(5, 1, CvType.Cv64fc1).CopyTo(mDistortionCoefficients);
Log.Info(TAG, "Instantiated new " + GetType().ToString());
mCornersSize = (int)(mPatternSize.Width * mPatternSize.Height);
}
public Mat OnCameraFrame(CameraBridgeViewBase.ICvCameraViewFrame inputFrame)
{
Mat rgba = inputFrame.Rgba();
Size sizeRgba = rgba.Size();
Mat rgbaInnerWindow;
int rows = (int)sizeRgba.Height;
int cols = (int)sizeRgba.Width;
int left = cols / 8;
int top = rows / 8;
int width = cols * 3 / 4;
int height = rows * 3 / 4;
switch (CameraViewActivity.viewMode)
{
case CameraViewActivity.VIEW_MODE_RGBA:
Point center = new Point(100, 200);
int radius = 100;
Scalar color = new Scalar(0, 255, 0);
// canvas, center, radius, color, linewidth
Imgproc.Circle(rgba, center, radius, color, 5);
center.X = 400;
center.Y = 700;
color.Val[0] = 255;
// canvas, string, left up, font id, size, color
Imgproc.PutText(rgba, "Surprise,\nmotherfucker!", center, 1, 4, color, 16);
break;
case CameraViewActivity.VIEW_MODE_HIST:
Mat hist = new Mat();
int thikness = (int)(sizeRgba.Width / (mHistSizeNum + 10) / 5);
if (thikness > 5)
{
thikness = 5;
}
int offset = (int)((sizeRgba.Width - (5 * mHistSizeNum + 4 * 10) * thikness) / 2);
// RGB
for (int c = 0; c < 3; c++)
{
Imgproc.CalcHist(Arrays.AsList(rgba).Cast <Mat>().ToList(), mChannels[c], mMat0, hist, mHistSize, mRanges);
Core.Normalize(hist, hist, sizeRgba.Height / 2, 0, Core.NormInf);
hist.Get(0, 0, mBuff);
for (int h = 0; h < mHistSizeNum; h++)
{
mP1.X = mP2.X = offset + (c * (mHistSizeNum + 10) + h) * thikness;
mP1.Y = sizeRgba.Height - 1;
mP2.Y = mP1.Y - 2 - (int)mBuff[h];
Imgproc.Line(rgba, mP1, mP2, mColorsRGB[c], thikness);
}
}
// Value and Hue
Imgproc.CvtColor(rgba, mIntermediateMat, Imgproc.ColorRgb2hsvFull);
// Value
Imgproc.CalcHist(Arrays.AsList(mIntermediateMat).Cast <Mat>().ToList(), mChannels[2], mMat0, hist, mHistSize, mRanges);
Core.Normalize(hist, hist, sizeRgba.Height / 2, 0, Core.NormInf);
hist.Get(0, 0, mBuff);
for (int h = 0; h < mHistSizeNum; h++)
{
mP1.X = mP2.X = offset + (3 * (mHistSizeNum + 10) + h) * thikness;
mP1.Y = sizeRgba.Height - 1;
mP2.Y = mP1.Y - 2 - (int)mBuff[h];
Imgproc.Line(rgba, mP1, mP2, mWhilte, thikness);
}
// Hue
Imgproc.CalcHist(Arrays.AsList(mIntermediateMat).Cast <Mat>().ToList(), mChannels[0], mMat0, hist, mHistSize, mRanges);
Core.Normalize(hist, hist, sizeRgba.Height / 2, 0, Core.NormInf);
hist.Get(0, 0, mBuff);
for (int h = 0; h < mHistSizeNum; h++)
{
mP1.X = mP2.X = offset + (4 * (mHistSizeNum + 10) + h) * thikness;
mP1.Y = sizeRgba.Height - 1;
mP2.Y = mP1.Y - 2 - (int)mBuff[h];
Imgproc.Line(rgba, mP1, mP2, mColorsHue[h], thikness);
}
break;
case CameraViewActivity.VIEW_MODE_CANNY:
rgbaInnerWindow = rgba.Submat(top, top + height, left, left + width);
Imgproc.Canny(rgbaInnerWindow, mIntermediateMat, 80, 90);
Imgproc.CvtColor(mIntermediateMat, rgbaInnerWindow, Imgproc.ColorGray2bgra, 4);
rgbaInnerWindow.Release();
break;
case CameraViewActivity.VIEW_MODE_SOBEL:
Mat gray = inputFrame.Gray();
Mat grayInnerWindow = gray.Submat(top, top + height, left, left + width);
rgbaInnerWindow = rgba.Submat(top, top + height, left, left + width);
Imgproc.Sobel(grayInnerWindow, mIntermediateMat, CvType.Cv8u, 1, 1);
Core.ConvertScaleAbs(mIntermediateMat, mIntermediateMat, 10, 0);
Imgproc.CvtColor(mIntermediateMat, rgbaInnerWindow, Imgproc.ColorGray2bgra, 4);
grayInnerWindow.Release();
rgbaInnerWindow.Release();
break;
case CameraViewActivity.VIEW_MODE_SEPIA:
rgbaInnerWindow = rgba.Submat(top, top + height, left, left + width);
Core.Transform(rgbaInnerWindow, rgbaInnerWindow, mSepiaKernel);
rgbaInnerWindow.Release();
break;
case CameraViewActivity.VIEW_MODE_ZOOM:
Mat zoomCorner = rgba.Submat(0, rows / 2 - rows / 10, 0, cols / 2 - cols / 10);
Mat mZoomWindow = rgba.Submat(rows / 2 - 9 * rows / 100, rows / 2 + 9 * rows / 100, cols / 2 - 9 * cols / 100, cols / 2 + 9 * cols / 100);
Imgproc.Resize(mZoomWindow, zoomCorner, zoomCorner.Size());
Size wsize = mZoomWindow.Size();
Imgproc.Rectangle(mZoomWindow, new Point(1, 1), new Point(wsize.Width - 2, wsize.Height - 2), new Scalar(255, 0, 0, 255), 2);
zoomCorner.Release();
mZoomWindow.Release();
break;
case CameraViewActivity.VIEW_MODE_PIXELIZE:
rgbaInnerWindow = rgba.Submat(top, top + height, left, left + width);
Imgproc.Resize(rgbaInnerWindow, mIntermediateMat, mSize0, 0.1, 0.1, Imgproc.InterNearest);
Imgproc.Resize(mIntermediateMat, rgbaInnerWindow, rgbaInnerWindow.Size(), 0.0, 0.0, Imgproc.InterNearest);
rgbaInnerWindow.Release();
break;
case CameraViewActivity.VIEW_MODE_POSTERIZE:
/*
* Imgproc.cvtColor(rgbaInnerWindow, mIntermediateMat, Imgproc.COLOR_RGBA2RGB);
* Imgproc.pyrMeanShiftFiltering(mIntermediateMat, mIntermediateMat, 5, 50);
* Imgproc.cvtColor(mIntermediateMat, rgbaInnerWindow, Imgproc.COLOR_RGB2RGBA);
*/
rgbaInnerWindow = rgba.Submat(top, top + height, left, left + width);
Imgproc.Canny(rgbaInnerWindow, mIntermediateMat, 80, 90);
rgbaInnerWindow.SetTo(new Scalar(0, 0, 0, 255), mIntermediateMat);
Core.ConvertScaleAbs(rgbaInnerWindow, mIntermediateMat, 1.0 / 16, 0);
Core.ConvertScaleAbs(mIntermediateMat, rgbaInnerWindow, 16, 0);
rgbaInnerWindow.Release();
break;
}
return(rgba);
}