public void Apply(Mat src)
{
using (ResourceTracker t = new ResourceTracker())
{
Stopwatch sw = new Stopwatch();
sw.Start();
Size srcSize = src.Size();
//todo: 只对脸部进行亮肤https://blog.csdn.net/cnbloger/article/details/77949949
//https://blog.csdn.net/skyqsdyy/article/details/89467143
//todo: 对src进行美颜、瘦脸、亮肤等。只要控制在一帧50ms之内即可。
Mat matMask = t.NewMat(srcSize, MatType.CV_8UC1, new Scalar(0));
RenderGreenScreenMask(src, matMask);
//the area is by integer instead of double, so that it can improve the performance of comparision of areas
int minBlockArea = (int)(srcSize.Width * srcSize.Height * this.MinBlockPercent);
var contoursExternalForeground = Cv2.FindContoursAsArray(matMask, RetrievalModes.External, ContourApproximationModes.ApproxNone)
.Select(c => new { contour = c, Area = (int)Cv2.ContourArea(c) })
.Where(c => c.Area >= minBlockArea)
.OrderByDescending(c => c.Area).Take(5).Select(c => c.contour);
//contoursExternalForeground = contoursExternalForeground.Select(c=>Cv2.ApproxPolyDP(c,0.5,true));
//a new Mat used for rendering the selected Contours
var matMaskForeground = t.NewMat(srcSize, MatType.CV_8UC1, new Scalar(0));
//thickness: -1 means filling the inner space
matMaskForeground.DrawContours(contoursExternalForeground, -1, new Scalar(255),
thickness: -1);
//matInternalHollow is the inner Hollow parts of body part.
var matInternalHollow = t.NewMat(srcSize, MatType.CV_8UC1, new Scalar(0));
Cv2.BitwiseXor(matMaskForeground, matMask, matInternalHollow);
int minHollowArea = (int)(minBlockArea * 0.5);//the lower size limitation of InternalHollow is less than minBlockArea, because InternalHollows are smaller
//find the Contours of Internal Hollow
var contoursInternalHollow = Cv2.FindContoursAsArray(matInternalHollow, RetrievalModes.External, ContourApproximationModes.ApproxNone)
.Select(c => new { contour = c, Area = Cv2.ContourArea(c) })
.Where(c => c.Area >= minHollowArea)
.OrderByDescending(c => c.Area).Take(10).Select(c => c.contour);
//draw hollows
foreach (var c in contoursInternalHollow)
{
matMaskForeground.FillConvexPoly(c, new Scalar(0));
}
var element = t.T(Cv2.GetStructuringElement(MorphShapes.Cross, new Size(3, 3)));
//smooth the edge of matMaskForeground
Cv2.MorphologyEx(matMaskForeground, matMaskForeground, MorphTypes.Close,
element, iterations: 6);
Cv2.GaussianBlur(matMaskForeground, matMaskForeground, new Size(3, 3), 0, 0);
var foreground = t.NewMat(src.Size(), MatType.CV_8UC4, new Scalar(0));
ZackCVHelper.AddAlphaChannel(src, foreground, matMaskForeground);
//resize the _backgroundImage to the same size of src
Cv2.Resize(_backgroundImage, src, src.Size());
//draw foreground(people) on the backgroundimage
ZackCVHelper.DrawOverlay(src, foreground);
Debug.WriteLine($"5:{sw.ElapsedMilliseconds}");
}
}
static void Main(string[] args)
{
using (ResourceTracker t = new ResourceTracker())
{
Mat picMat = t.T(Cv2.ImRead("bg.png"));
Mat mat1 = t.T(255 - picMat);
Mat mat2 = t.T(np.zeros_like(mat1));
Mat mat3 = t.NewMat();
Mat mat4 = t.T(np.array(new byte[] { 33, 88, 99 }));
Mat mat5 = t.T(np.array(33, 88, 99));
Mat mat6 = t.T(255 - t.T(picMat * 0.8));
Mat[] mats1 = t.T(picMat.Split());
Mat[] mats2 = new Mat[] { mats1[0], mats1[1], mats1[2], t.T(np.zeros_like(picMat)) };
Cv2.Merge(mats2, mat3);
}
using (ResourceTracker t = new ResourceTracker())
{
Mat mat1 = t.NewMat(new Size(100, 100), MatType.CV_8UC3, new Scalar(0));
Mat mat3 = t.T(255 - t.T(mat1 * 0.8));
Mat[] mats1 = t.T(mat3.Split());
Mat mat4 = t.NewMat();
Cv2.Merge(new Mat[] { mats1[0], mats1[1], mats1[2] }, mat4);
}
using (ResourceTracker t = new ResourceTracker())
{
var img1 = t.T(Cv2.ImRead("bg.png"));
var img2 = t.T(Cv2.ImRead("2.jpg"));
var img2_resized = t.T(np.zeros_like(img1));
Cv2.Resize(img2, img2_resized, img1.Size());
var img3 = t.T(np.zeros_like(img1));
np.where < Vec3b > (img1, img3, p => p.Item0 < 100 || p.Item1 < 100, img1, img2_resized);
Cv2.ImShow("a", img3);
Cv2.WaitKey();
}
}