protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
using(IntPtrSafeMemoryBox box = new IntPtrSafeMemoryBox())
{
box.Value = Handle;
CxCore.cvReleaseMemStorage(box.Pointer);
}
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
using (IntPtrSafeMemoryBox releasePad = new IntPtrSafeMemoryBox())
{
releasePad.Value = Handle;
HighGui.cvReleaseCapture(releasePad.Pointer);
}
}
void DrawSquares(List<CvPoint> squares, PieceInfo[] pieces, HighGuiWindow window)
{
using (IplImage cpy = lastFrame.CloneImage())
{
StructureSafeMemoryBox<CvPoint> pt = new StructureSafeMemoryBox<CvPoint>(4);
IntPtrSafeMemoryBox rect = new IntPtrSafeMemoryBox();
rect.Value = pt.Pointer;
Int32SafeMemoryBox count = new Int32SafeMemoryBox();
count.Value = 4;
for (int i = 0; i < squares.Count; i += 4)
{
pt[0] = squares[i + 0];
pt[1] = squares[i + 1];
pt[2] = squares[i + 2];
pt[3] = squares[i + 3];
CvPoint center = new CvPoint((squares[i + 0].x + squares[i + 2].x) / 2,
(squares[i + 0].y + squares[i + 2].y) / 2);
// CvScalar color = new CvScalar(0, 255, 255);
CxCore.cvPolyLine(cpy, rect.Pointer, count.Pointer,
1, 1, CvScalar.FromRGB(255, 255, 0), 3, CxCore.CV_AA, 0);
}
PieceInfo[,] layout = lastLayout;
if (layout != null)
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
pt[0] = new CvPoint(j * 20 + 3, i * 20 + 3);
pt[1] = new CvPoint(j * 20 + 3, i * 20 + 18);
pt[2] = new CvPoint(j * 20 + 18, i * 20 + 18);
pt[3] = new CvPoint(j * 20 + 18, i * 20 + 3);
CvScalar color = CvScalar.FromRGB(layout[i, j].color[0], layout[i, j].color[1], layout[i, j].color[2]);
CxCore.cvFillPoly(cpy, rect.Pointer, count.Pointer, 1, color, CxCore.CV_AA, 0);
}
}
}
count.Dispose();
rect.Dispose();
pt.Dispose();
window.ShowImage(cpy);
}
}
public static List<CvPoint> FindRectangles(IplImage image)
{
storage.Clear();
const int N = 11;
const int thresh = 50;
CvSize imageSize = image.Size;
CvSize evenImageSize = new CvSize(imageSize.width & ~1, imageSize.height & ~1);
double MinArea = (evenImageSize.height / 12) * (evenImageSize.height / 12);
double MaxArea = (evenImageSize.height / 4) * (evenImageSize.height / 4);
List<CvPoint> squares = new List<CvPoint>();
using (IplImage timg = new IplImage(imageSize, 8, 3),
gray = new IplImage(evenImageSize, 8, 1),
pyr = new IplImage(new CvSize(evenImageSize.width / 2, evenImageSize.height / 2), 8, 3))
{
Cv.cvCvtColor(image, timg, Cv.CV_BGR2HSV);
CxCore.cvSetImageROI(timg, new CvRect(new CvPoint(), evenImageSize));
Cv.cvPyrDown(timg, pyr, 7);
Cv.cvPyrUp(pyr, timg, 7);
IplImage tgray = new IplImage(evenImageSize, 8, 1);
for (int c = 0; c < 3; c++)
{
CxCore.cvSetImageCOI(timg, c + 1);
timg.CopyTo(tgray);
for (int l = 0; l < N; l++)
{
if (l == 0)
{
Cv.cvCanny(tgray, gray, 0, thresh, 5);
Cv.cvDilate(gray, gray, IntPtr.Zero, 1);
}
else
{
Cv.cvThreshold(tgray, gray, (l + 1) * 255 / N, 255, 0);
}
CvSeqNavigator contours;
using (IntPtrSafeMemoryBox box = new IntPtrSafeMemoryBox())
{
Cv.cvFindContours(gray, storage, box.Pointer, CvTypeSizes.CvContourSize,
Cv.CV_RETR_LIST, Cv.CV_CHAIN_APPROX_SIMPLE, new CvPoint());
contours = new CvSeqNavigator(box.Value);
}
while (!contours.IsEmpty)
{
IntPtr resultSeq = Cv.cvApproxPoly(contours.Pointer,
CvTypeSizes.CvContourSize, storage, Cv.CV_POLY_APPROX_DP,
Cv.cvContourPerimeter(contours) * 0.02, 0);
CvSeqCollection<CvPoint> result = new CvSeqCollection<CvPoint>(resultSeq, true);
if (result.Count == 4)
{
double area = Math.Abs(Cv.cvContourArea(resultSeq, CvSlice.WholeSeq));
if (area >= MinArea && area <= MaxArea &&
Cv.cvCheckContourConvexity(resultSeq) != 0)
{
CvPoint[] resultArray = result.ToArray();
double dist1 = Math.Sqrt(CvPoint.Distance2(resultArray[0], resultArray[1]));
double dist2 = Math.Sqrt(CvPoint.Distance2(resultArray[1], resultArray[2]));
double dist3 = Math.Sqrt(CvPoint.Distance2(resultArray[2], resultArray[3]));
double dist4 = Math.Sqrt(CvPoint.Distance2(resultArray[3], resultArray[0]));
bool found = Math.Abs((dist1 - dist3) / (dist1 + dist3)) < 0.1 &&
Math.Abs((dist2 - dist4) / (dist2 + dist4)) < 0.1 &&
Math.Abs((dist1 - dist2) / (dist1 + dist2)) < 0.1;
if (found)
{
for (int i = 0; i < 4; i++)
{
squares.Add(result[i]);
}
}
}
}
contours.Next();
}
}
}
}
return squares;
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (ownHandle)
{
using (IntPtrSafeMemoryBox releasePad = new IntPtrSafeMemoryBox())
{
releasePad.Value = Handle;
CxCore.cvReleaseImage(releasePad.Pointer);
}
}
}
