int x = (int)(Math.Sin(Cv.PI / 180 * radian) * (int)(Math.Sqrt(_V) / 1.5)) + nX / nCount;
int y = (int)(Math.Cos(Cv.PI / 180 * radian) * (int)(Math.Sqrt(_V) / 1.5)) + nY / nCount;

if (checkV == -1)
{

if (y > 0 && x > 0 && y < 480 && x < 640)
checkV = _Value[x, y];

}
else
{

if (y > 0 && x > 0 && y < 480 && x < 640)
{

if (checkV != _Value[x, y])
{

checkV = _Value[x, y];
_Count++;

}

}

}

}