private FeatureMatchResult GetMatchResult(IList <DMatch> matches, IList <KeyPoint> sourceKeyPoints,
IList <KeyPoint> searchKeyPoints)
{
//至少识别3个点才能得到一个几何图形
var success = matches.Count > 3;
var matchResult = new FeatureMatchResult()
{
Success = success
};
if (!success)
{
return(matchResult);
}
var goodSourceKeyPoints = new List <KeyPoint>();
var goodSearchKeyPoints = new List <KeyPoint>();
var points = new List <System.Drawing.Point>();
double x = double.MaxValue, x1 = 0, y = double.MaxValue, y1 = 0;
foreach (var match in matches)
{
goodSourceKeyPoints.Add(sourceKeyPoints[match.QueryIdx]);
goodSearchKeyPoints.Add(searchKeyPoints[match.TrainIdx]);
var point = sourceKeyPoints[match.QueryIdx].Pt;
points.Add(new System.Drawing.Point((int)point.X, (int)point.Y));
x = Math.Min(point.X, x);
x1 = Math.Max(point.X, x1);
y = Math.Min(point.Y, y);
y1 = Math.Max(point.Y, y1);
}
var leftTop = new System.Drawing.Point((int)Math.Min(x, x1), (int)Math.Min(y, y1));
var size = new System.Drawing.Size((int)Math.Abs(x - x1), (int)Math.Abs(y - y1));
matchResult.MatchItems.Add(new FeatureMatchResultItem()
{
Point = new System.Drawing.Point((int)(x + (double)size.Width / 2),
(int)(y + (double)size.Height / 2)),
FeaturePoints = points,
Rectangle = new Rectangle(leftTop, size),
});
return(matchResult);
}
/// <summary>
/// 预览匹配结果（仅在开启了<see cref="MatchArgument.PreviewMatchResult"/>配置时）
/// </summary>
/// <param name="argument"></param>
/// <param name="matchResult"></param>
/// <param name="sourceMat"></param>
/// <param name="searchMat"></param>
/// <param name="keySourcePoints"></param>
/// <param name="keySearchPoints"></param>
/// <param name="goodMatches"></param>
internal static void PreviewDebugFeatureMatchResult(this MatchArgument argument, FeatureMatchResult matchResult, Mat sourceMat, Mat searchMat,
IEnumerable <KeyPoint> keySourcePoints, IEnumerable <KeyPoint> keySearchPoints,
IEnumerable <DMatch> goodMatches)
{
if (!argument.IsExtensionConfigEnabled(MatchArgument.PreviewMatchResult))
{
return;
}
using var image = new Mat(sourceMat, OpenCvSharp.Range.All);
if (matchResult.Success)
{
foreach (var matchItem in matchResult.MatchItems)
{
var rectangle = matchItem.Rectangle;
Cv2.Rectangle(image, new Point(rectangle.X, rectangle.Y), new Point(rectangle.Right, rectangle.Bottom), Scalar.RandomColor(), 3);
}
}
using var imgMatch = new Mat();
Cv2.DrawMatches(image, keySourcePoints, searchMat, keySearchPoints, goodMatches, imgMatch, flags: DrawMatchesFlags.NotDrawSinglePoints);
PreviewMatchResultImage(imgMatch);
}
