/// <summary>
/// 繪製黑白交錯的曲線(縱軸是Intensity,橫軸是排序的線段從最前面的線段到最下面的線段的座標)
/// </summary>
/// <param name="drawImg"></param>
/// <param name="current">現在的座標像素</param>
/// <param name="previous">前一個點的座標像素</param>
/// <param name="x">x軸步近的值</param>
private static void DrawBlackWhiteCurve(Image <Bgr, byte> drawImg, IntensityPoint current, IntensityPoint previous, int x)
{
//繪製呈現用，斑馬線黑白像素經過的圖形
int projectY = Math.Abs((int)current.GetIntensity() - 300);
if (!current.IsEmpty() && !previous.IsEmpty())
{
float prevPorjectY = Math.Abs((float)previous.GetIntensity() - 300);
drawImg.Draw(new LineSegment2DF(new PointF(x - 2, projectY), new PointF(x, prevPorjectY)), new Bgr(Color.Green), 1);
}
else
{
drawImg.Draw(new LineSegment2DF(new PointF(0, 300), new PointF(x, projectY)), new Bgr(Color.Red), 1);
}
drawImg.Draw(new CircleF(new PointF(x, projectY), 1), new Bgr(Color.Blue), 2);
}
private static bool DoBlackWhiteStatisticsByScanLine(List <LineSegment2DF> lines, Image <Gray, byte> source, Image <Bgr, byte> stasticDst)
{
string checkBlackWhiteCrossingPoint = "";
Image <Bgr, byte> blackWhiteCurveImg = new Image <Bgr, byte>(480, 300, new Bgr(Color.White));
int x = 0; // 要尋訪的起點
IntensityPoint current, previous;
current = new IntensityPoint();
previous = new IntensityPoint();
//記錄每一條線段的像素統計用的索引
int pixelSum = 0;
int previousPixelValue = -1;
int previousCheckIntentisty = -1;
//計算線段通過pixel
foreach (LineSegment2DF line in lines)
{
float nextX;
float nextY = line.P1.Y;
//如果尋訪小於線段結束點的y軸，則不斷尋訪
while (nextY < line.P2.Y)
{
nextX = GetXPositionFromLineEquations(line.P1, line.P2, nextY);
//抓灰階 or 二值化做測試
Gray pixel = source[Convert.ToInt32(nextY), Convert.ToInt32(nextX)];
CheckBlackWhiteTexture(checkBlackWhiteCrossingPoint, pixel.Intensity, ref pixelSum, ref previousPixelValue, ref previousCheckIntentisty, ref checkBlackWhiteCrossingPoint);
//取得目前掃描線步進的素值
current.SetData(new PointF(nextX, nextY), pixel.Intensity);
if (stasticDst != null)
{
DrawBlackWhiteCurve(stasticDst, current, previous, x);
}
//設定前一筆
previous.SetData(current.GetLocation(), current.GetIntensity());
//Console.WriteLine("x:" + nextX + ",y:" + nextY + ",Intensity:" + pixel.Intensity);
//步進Y
nextY++;
//繪製用的步進值
x += 5;
}
}
////顯示所有check的狀況
Console.WriteLine(checkBlackWhiteCrossingPoint);
if (checkBlackWhiteCrossingPoint.Contains("010101") || checkBlackWhiteCrossingPoint.Contains("101010"))
{
Console.WriteLine("有交錯");
return(true);
}
else
{
return(false);
}
}