public static Bitmap CyclicPatternsInLines(List <Point> edgePoints, List <RawLine> rawLines, RecognitionOptions options)
{
rawLines = rawLines.OrderBy(l => l.yInt).ToList();
List <Bitmap> images = new List <Bitmap>();
foreach (var rawLine in rawLines)
{
bool[] linePoints = new bool[options.imageWidth];
foreach (var pt in edgePoints)
{
if (Math.Abs(rawLine.yInt - (pt.Y - pt.X * rawLine.k)) < 2)
{
linePoints[pt.X] = true;
}
}
var lines = SegmentDetector.GetSegments(linePoints, rawLine);
if (lines.Count > 0)
{
images.Add(CyclicPatternsImage(linePoints, lines.First().p1.X, lines.Last().p2.X));
}
}
return(ImageUtil.VerticalConcat(images));
}
/*
* Forms solid lines from set of raw lines.
* Discards lines that have cyclic patterns in them.
*/
public static List <Line> FilterLines(List <Point> edgePoints, List <RawLine> rawLines, RecognitionOptions options)
{
List <Line> lines = new List <Line>();
foreach (var rawLine in rawLines)
{
// convert rawLine to list of black/white pixels
bool[] linePoints = new bool[options.imageWidth];
foreach (var pt in edgePoints)
{
if (Math.Abs(rawLine.yInt - (pt.Y - pt.X * rawLine.k)) < 2)
{
linePoints[pt.X] = true;
}
}
var segments = SegmentDetector.GetSegments(linePoints, rawLine);
if (segments.Count > 0)
{
Line solidLine = SegmentDetector.GetSolidLine(segments);
if (!options.detectCyclicPatterns ||
!CyclicPatternDetector.HasCyclicPatterns(linePoints, solidLine.p1.X, solidLine.p2.X, options))
{
lines.Add(solidLine);
}
}
}
return(lines);
}