//Board(81cells) recognition
public Mat _2B_SDK_ProjectivTransformInv(Mat frame2, Point[] Q4W, bool DispB)
{
int rgN = regSize, Na = 0, Nb = regSize, Nc = Na + Nb;
Size sz = new Size(rgN, rgN);
//射影変換設定
Point[] reaXY = { new Point(Na, Na), new Point(Nc, Na), new Point(Nc, Nc), new Point(Na, Nc) }; //■テンプレート枠
PT.SetPoint(reaXY, Q4W); //Projective transformation parameter set
PT.ProjectionSolver(); //Calculation of projective transformation parameters
byte b255 = 255, b0 = 0, thVal = 128;
Mat BlockImg = new Mat(sz, MatType.CV_8UC1);
unsafe {
int Hi = frame2.Height, Wi = frame2.Width, Wb = BlockImg.Width;
byte *S = frame2.DataPointer;
byte *D = BlockImg.DataPointer;
Point Qi = new Point(), Qr = new Point();
for (int y = 0; y < rgN; y++)
{
Qr.Y = y;
for (int x = 0; x < rgN; x++)
{
Qr.X = x;
Qi = PT.Convert_RtoI(Qr);
if (Qi.X < 0 || Qi.X >= Wi || Qi.Y < 0 || Qi.Y >= Hi)
{
continue;
}
D[y * Wb + x] = (S[Qi.Y * Wi + Qi.X] > thVal)? b255: b0;
}
}
}
// Cv2.ImWrite("BlockImg.jpg", BlockImg);
if (DispB)
{
new Window("SDK_MakeOutCel", WindowMode.KeepRatio, BlockImg);
}
return(BlockImg);
}