/// <summary>
/// 该方法是找出所有相似的点，然后取最左边的点和最右边的点的中间，即使小人的中心点
/// </summary>
/// <param name="bitmap"></param>
/// <param name="width"></param>
/// <param name="sy"></param>
/// <param name="ey"></param>
/// <param name="personColor"></param>
/// <returns></returns>
public static PersonEntity GetLittlePersonBottom(Bitmap bitmap, int width, int sy, int ey, Color personColor, Action <string, Label> timeAction, Label label)
{
var lx = width;
var ly = 0;
var rx = 0;
var ry = 0;
var miny = bitmap.Height;
var maxy = 0;
Stopwatch sw = new Stopwatch();
sw.Start();
LockBitmap lockbmp = new LockBitmap(bitmap);
lockbmp.LockBits();
for (var y = sy; y < ey; ++y)
{
for (var x = 0; x < width; ++x)
{
//var color = bitmap.GetPixel(x, y);
var color = lockbmp.GetPixel(x, y);
if (Math.Abs(color.R - personColor.R) <= 10 &&
Math.Abs(color.G - personColor.G) <= 10 &&
Math.Abs(color.B - personColor.B) <= 10)
{
//bitmap.SetPixel(x, y, Color.Red);
if (x <= lx)
{
lx = x;
ly = y;
}
if (x >= rx)
{
rx = x;
ry = y;
}
if (y < miny)
{
miny = y;
}
if (y > maxy)
{
maxy = y;
}
}
}
}
lockbmp.UnlockBits();
var px = (rx - lx) / 2 + lx;
var py = ly;
var g = Graphics.FromImage(bitmap);
//最左边的点
g.FillEllipse(Brushes.Red, new Rectangle(lx - 2, ly - 2, 5, 5));
//真正需要的点
g.FillEllipse(Brushes.Red, new Rectangle(px - 5, py - 5, 11, 11));
g.Dispose();
sw.Stop();
timeAction?.Invoke(sw.ElapsedMilliseconds.ToString(), label);
//return new Point(px, py);
return(new PersonEntity()
{
Center = new Point()
{
X = px, Y = py
},
LeftUp = new Point()
{
X = lx - 5, Y = miny - 5
},
RightDown = new Point()
{
X = rx + 5, Y = maxy + 5
}
});
}
/// <summary>
/// 该方法是先找出盒子的顶点，然后找最左边颜色跟顶点相近的点，在取最右边的点，左右中心即是要的点
/// </summary>
/// <param name="bitmap"></param>
/// <param name="width"></param>
/// <param name="sy"></param>
/// <param name="ey"></param>
/// <returns></returns>
public static Point GetBoxCenterPoint(Bitmap bitmap, int width, int sy, int ey, PersonEntity pe, Action <string, Label> timeAction, Label label)
{
Stopwatch sw = new Stopwatch();
sw.Start();
LockBitmap lockbitmap = new LockBitmap(bitmap);
lockbitmap.LockBits();
//去背景色
var background = lockbitmap.GetPixel(5, sy + 5);
var A = new Point(-1, -1); //下一个盒子的顶点
var B = new Point(width, -1); //下一个盒子的最左边的点
var C = new Point(-1, -1); //下一个盒子的最右边的点
var boxColor = Color.Empty;
//遍历
//找A点
for (var y = sy; (y < ey) && (A.X == -1); ++y)
{
for (var x = 0; x < width; ++x)
{
if (x >= pe.LeftUp.X && x <= pe.RightDown.X && y >= pe.LeftUp.Y && y <= pe.RightDown.Y)
{
continue;
}
var color = lockbitmap.GetPixel(x, y);
if (Math.Abs(color.R - background.R) > 12 ||
Math.Abs(color.G - background.G) > 12 ||
Math.Abs(color.B - background.B) > 12)
{
A.X = x;
//因为会有阴影，所以向下加几个像素
A.Y = y + 3;
//记录盒子的颜色
boxColor = lockbitmap.GetPixel(A.X, A.Y);
//结束获取A
break;
}
}
}
//找B点
var bsx = A.X - 300;
var bex = A.X + 300;
bsx = bsx < 0 ? 0 : bsx;
bex = bex > width ? width - 10 : bex;
var count = 0;
//有的靠很近，所以不用加太多
//for (var y = A.Y + 50; (y < A.Y + 300) && count <= 30; ++y)
for (var y = A.Y + 1; (y < A.Y + 300) && count <= 30; ++y)
{
for (var x = bsx; x < bex; ++x)
{
var color = lockbitmap.GetPixel(x, y);
if (Math.Abs(color.R - boxColor.R) <= 3 &&
Math.Abs(color.G - boxColor.G) <= 3 &&
Math.Abs(color.B - boxColor.B) <= 3)
{
if (x < B.X)
{
B.X = x;
B.Y = y;
}
else if (x >= B.X)
{
++count;
}
break;
}
}
}
var centerPoint = new Point(A.X, B.Y);
lockbitmap.UnlockBits();
var g = Graphics.FromImage(bitmap);
//取背景色的点
g.FillEllipse(Brushes.Red, 5, sy + 5, 10, 10);
//A点
g.FillEllipse(Brushes.Red, new Rectangle(A.X - 5, A.Y - 5, 11, 11));
//B点
g.FillEllipse(Brushes.Red, new Rectangle(B.X - 5, B.Y - 5, 11, 11));
//中心点
g.FillEllipse(Brushes.Red, new Rectangle(centerPoint.X - 5, centerPoint.Y - 5, 11, 11));
g.Dispose();
sw.Stop();
timeAction?.Invoke(sw.ElapsedMilliseconds.ToString(), label);
return(centerPoint);
}
