public DiffContainer GetDiffs(Bitmap newFrame, int compressRate)
{
IplImage Frame = BitmapConverter.ToIplImage(newFrame);
if (_oldImage == null || _oldImage.Height != newFrame.Height)
{
_oldImage = new Bitmap(newFrame.Width, newFrame.Height);
}
IplImage Previous_Frame = BitmapConverter.ToIplImage(_oldImage);
IplImage Difference = new IplImage(Previous_Frame.Width, Previous_Frame.Height, BitDepth.U8, 4);
Cv.AbsDiff(Frame, Previous_Frame, Difference);
IplImage gray = new IplImage(Previous_Frame.Width, Previous_Frame.Height, BitDepth.U8, 1);
Cv.CvtColor(Difference, gray, ColorConversion.RgbToGray);
DiffContainer container = new DiffContainer();
CvSeq <CvPoint> contours;
CvSeq <CvPoint> contour;
using (CvMemStorage storage = new CvMemStorage())
for (int i = gray.FindContours(storage, out contours, CvContour.SizeOf, ContourRetrieval.External, ContourChain.ApproxSimple); contours != null; contours = contours.HNext)
{
contour = Cv.ApproxPoly(contours, CvContour.SizeOf, storage, ApproxPolyMethod.DP, 0.2);
if (contour.ContourPerimeter() > 100 &&
contour.ContourPerimeter() < 10000
)
{
var r = contour.BoundingRect();
var im = Frame.GetSubImage(r);
Rectangle rect = new Rectangle(r.X, r.Y, r.Width, r.Height);
rect.X -= 1;
rect.Y -= 1;
rect.Width += 2;
rect.Height += 2;
var j = BitmapConverter.ToBitmap(im);
container.Data.Add(rect, j);
}
}
UpdateOldFrame(container);
return(container);
}
public DiffContainer GetDiffs(Bitmap newFrame, int compressRate)
{
//sw.Restart();
Image <Bgr, Byte> Frame = new Image <Bgr, byte>(newFrame);
if (_oldImage == null || _oldImage.Height != newFrame.Height)
{
_oldImage = new Bitmap(newFrame.Width, newFrame.Height);
}
Previous_Frame = new Image <Bgr, byte>(_oldImage);
Image <Bgr, Byte> Difference;
Difference = Previous_Frame.AbsDiff(Frame);
Image <Gray, Byte> gray = Difference.Convert <Gray, Byte>().PyrDown().PyrUp();
DiffContainer container = new DiffContainer();
List <MovedObject> movedObjects = new List <MovedObject>();
using (MemStorage storage = new MemStorage())
for (Contour <System.Drawing.Point> contours = gray.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, RETR_TYPE.CV_RETR_EXTERNAL, storage);
contours != null; contours = contours.HNext)
{
Contour <Point> contour = contours.ApproxPoly(contours.Perimeter * 0.001);
if (contour.Area > 100)
// if (contour.Total > 5)
{
Rectangle rect = contour.BoundingRectangle;
rect.X -= 1;
rect.Y -= 1;
rect.Width += 2;
rect.Height += 2;
var part = Frame.GetSubRect(rect);
//var j = ImageResizer.ImageBuilder.Current.Build(part.ToBitmap(),
// new ImageResizer.ResizeSettings(
// "maxwidth=" + part.Width / CompressRate +
// "&maxheight=" + part.Height +
// "&format=jpg&quality=20"
// ));
var j = part.ToBitmap();
container.Data.Add(rect, j);
}
}
UpdateOldFrame(container);
//sw.Stop();
//container.Elapsed = sw.ElapsedMilliseconds;
return(container);
}
public DiffItem(Rectangle rectangle, Bitmap bitmap, byte quality)
{
X = rectangle.X;
Y = rectangle.Y;
Width = rectangle.Width;
Height = rectangle.Height;
//ImageBytes = DiffContainer.ImageToByteArray(bitmap);
ImageBytes = DiffContainer.ImageToByte2(bitmap, quality);
}
private void UpdateOldFrame(DiffContainer diffs)
{
Graphics g = Graphics.FromImage(_oldImage);
foreach (var p in diffs.Data)
{
g.DrawImage(p.Value, p.Key);
}
Previous_Frame = new Image <Bgr, byte>(_oldImage);
}
private void UpdateOldFrame(DiffContainer diffs)
{
Graphics g = Graphics.FromImage(_oldImage);
foreach (var p in diffs.Data)
{
g.DrawImage(p.Value, p.Key);
}
Previous_Frame = BitmapConverter.ToIplImage(_oldImage);
}
object IDiffManager.Compress(DiffContainer diffContainer)
{
throw new NotImplementedException();
}
public DiffContainer GetDiffs(Bitmap newFrame, int compressRate)
{
if (_oldImage == null || _oldImage.Height != newFrame.Height)
{
_oldImage = new Bitmap(newFrame.Width, newFrame.Height);
}
var diffContainer = new DiffContainer();
var bitmapData = newFrame.LockBits(new Rectangle(0, 0, newFrame.Width, newFrame.Height), ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
var oldBitmapData = _oldImage.LockBits(new Rectangle(0, 0, _oldImage.Width, _oldImage.Height),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
var startY = 0;
var startX = 0;
var endY = newFrame.Height - 1;
var endX = newFrame.Width - 1;
var inc = 4;
unsafe
{
var identical = true;
for (int j = 0; j < newFrame.Height - inc; j += inc)
{
var needBreak = false;
for (int i = 0; i < newFrame.Width - inc; i += inc)
{
if (
*
((int *)
((int)bitmapData.Scan0 + bitmapData.Stride * j + bitmapData.Stride / bitmapData.Width * i)) !=
*
((int *)
((int)oldBitmapData.Scan0 + oldBitmapData.Stride * j + oldBitmapData.Stride / oldBitmapData.Width * i)))
{
startY = j;
identical = false;
needBreak = true;
break;
}
}
if (needBreak)
{
break;
}
}
if (identical)
{
newFrame.UnlockBits(bitmapData);
_oldImage.UnlockBits(oldBitmapData);
return(diffContainer);
}
for (int j = newFrame.Height - 1; j >= startY + inc; j -= inc)
{
var needBreak = false;
for (int i = 0; i < newFrame.Width - inc; i += inc)
{
if (
*
((int *)
((int)bitmapData.Scan0 + bitmapData.Stride * j + bitmapData.Stride / bitmapData.Width * i)) !=
*
((int *)
((int)oldBitmapData.Scan0 + oldBitmapData.Stride * j + oldBitmapData.Stride / oldBitmapData.Width * i)))
{
endY = j;
needBreak = true;
break;
}
}
if (needBreak)
{
break;
}
}
for (int i = 0; i < newFrame.Width - inc; i += inc)
{
var needBreak = false;
for (int j = startY; j <= endY - inc; j += inc)
{
if (
*
((int *)
((int)bitmapData.Scan0 + bitmapData.Stride * j + bitmapData.Stride / bitmapData.Width * i)) !=
*
((int *)
((int)oldBitmapData.Scan0 + oldBitmapData.Stride * j + oldBitmapData.Stride / oldBitmapData.Width * i)))
{
startX = i;
needBreak = true;
break;
}
}
if (needBreak)
{
break;
}
}
for (int i = newFrame.Width - 1; i >= startX + inc; i -= inc)
{
var needBreak = false;
for (int j = startY; j <= endY - inc; j += inc)
{
if (
*
((int *)
((int)bitmapData.Scan0 + bitmapData.Stride * j + bitmapData.Stride / bitmapData.Width * i)) !=
*
((int *)
((int)oldBitmapData.Scan0 + oldBitmapData.Stride * j + oldBitmapData.Stride / oldBitmapData.Width * i)))
{
endX = i;
needBreak = true;
break;
}
}
if (needBreak)
{
break;
}
}
}
if (startY - 10 >= 0)
{
startY -= 10;
}
else
{
startY = 0;
}
if (endY + 10 < newFrame.Height)
{
endY += 10;
}
else
{
endY = newFrame.Height - 1;
}
if (startX - 10 >= 0)
{
startX -= 10;
}
else
{
startX = 0;
}
if (endX + 10 < newFrame.Width)
{
endX += 10;
}
else
{
endX = newFrame.Width - 1;
}
newFrame.UnlockBits(bitmapData);
_oldImage.UnlockBits(oldBitmapData);
var diffBitmap = newFrame.Clone(new Rectangle(startX, startY, endX - startX + 1, endY - startY + 1), newFrame.PixelFormat);
diffContainer.Data.Add(new Rectangle(startX, startY, diffBitmap.Width, diffBitmap.Height), diffBitmap);
_oldImage = newFrame;
return(diffContainer);
}