/// <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("01010") || checkBlackWhiteCrossingPoint.Contains("10101"))
{
Console.WriteLine("有交錯");
return(true);
}
else
{
return(false);
}
}
public static bool AnalyzeZebraCrossingTexture(int mainDirectionLineGroupId, Dictionary <LineQuantification, LinkedList <LineEquation> > linesHistogram, Image <Gray, byte> processingImg, Image <Bgr, byte> oriImg, Image <Bgr, byte> stasticDst, Image <Bgr, byte> drawScanLineImg)
{
//紀錄斑馬線之間白色連結起來的線段
List <LineSegment2DF> crossingConnectionlines = new List <LineSegment2DF>();
Point prePoint = new Point();
Point currentPoint = new Point();
Image <Bgr, byte> scanLineImg = oriImg.Clone();
IntensityPoint current, previous;
current = new IntensityPoint();
previous = new IntensityPoint();
int index = 0;
List <LineEquation> orderedLines = new List <LineEquation>();
//角度幾乎呈垂直,所以排序用x軸
if ((17 <= mainDirectionLineGroupId && mainDirectionLineGroupId <= 18) || (7 <= mainDirectionLineGroupId && mainDirectionLineGroupId <= 9))
{
var orderedMainLines = from line in linesHistogram[(LineQuantification)mainDirectionLineGroupId] orderby(line.Line.P1.X + line.Line.P2.X) / 2 select line;
foreach (LineEquation line in orderedMainLines)
{
orderedLines.Add(line);
}
}
else
{
var orderedMainLines = from line in linesHistogram[(LineQuantification)mainDirectionLineGroupId] orderby(line.Line.P1.Y + line.Line.P2.Y) / 2 select line;
foreach (LineEquation line in orderedMainLines)
{
orderedLines.Add(line);
}
}
foreach (LineEquation line in orderedLines)
{
int lineCenterY = (line.Line.P1.Y + line.Line.P2.Y) / 2;
int lineCenterX = (line.Line.P1.X + line.Line.P2.X) / 2;
if (!currentPoint.IsEmpty)
{
prePoint = currentPoint;
}
currentPoint = new Point(lineCenterX, lineCenterY);
//兩點 =>存放線條,並繪製
if (!currentPoint.IsEmpty && !prePoint.IsEmpty)
{
LineSegment2DF scanline = new LineSegment2DF(prePoint, currentPoint);
if (drawScanLineImg != null)
{
drawScanLineImg.Draw(scanline, Utilities.LineColors[index % Utilities.LineColors.Length], 2);
}
//記錄每一條線段
crossingConnectionlines.Add(scanline);
//Console.WriteLine("draw Line:direction ,x = " + scanline.Direction.X + "y =" + scanline.Direction.Y + ",point p1.x =" + prePoint.X + ",p1.y = " + prePoint.Y + ", p2.x =" + currentPoint.X + ",p2.y = " + currentPoint.Y);
}
//Console.WriteLine("-------------------------------------");
index++;
}
//統計黑白像素與判斷是否每條線段為白黑白的特徵
bool isBlackWhiteCrossing = DoBlackWhiteStatisticsByScanLine(crossingConnectionlines, processingImg, stasticDst);
if (isBlackWhiteCrossing && linesHistogram[(LineQuantification)mainDirectionLineGroupId].Count > 3)
{
//Console.WriteLine("共有" + linesHistogram[(LineQuantification)mainDirectionLineGroupId].Count + "相似斜率線段");
return(true);
}
else
{
return(false);
}
}