/// <summary>
/// 获取匹配结果
/// </summary>
/// <param name="searchMat">对应的训练（模板）图像</param>
/// <param name="resultMat">匹配结果</param>
/// <param name="matchModes">匹配算法</param>
/// <param name="argument">匹配参数</param>
/// <returns></returns>
private static TemplateMatchResult GetMatchResult(Mat searchMat, Mat resultMat, TemplateMatchModes matchModes, TemplateMatchArgument argument)
{
var threshold = argument.Threshold;
var maxCount = argument.MaxCount;
var matchResult = new TemplateMatchResult();
while (matchResult.MatchItems.Count < maxCount)
{
double value;
Point topLeft;
Cv2.MinMaxLoc(resultMat, out var minValue, out var maxValue, out var minLocation, out var maxLocation);
if (matchModes == TemplateMatchModes.SqDiff || matchModes == TemplateMatchModes.SqDiffNormed)
{
value = minValue;
topLeft = minLocation;
}
else
{
value = maxValue;
topLeft = maxLocation;
}
if (maxValue < threshold)
{
break;
}
argument.OutputDebugMessage($"[TemplateMatch] The info of the match is ([{matchModes}][{threshold:F}][{matchResult.MatchItems.Count}]) = {value:F}.");
var matchItem = new TemplateMatchResultItem()
{
Value = value
};
var centerX = topLeft.X + (double)searchMat.Width / 2;
var centerY = topLeft.Y + (double)searchMat.Height / 2;
matchItem.Point = new System.Drawing.Point((int)centerX, (int)centerY);
matchItem.Rectangle =
new System.Drawing.Rectangle(topLeft.X, topLeft.Y, searchMat.Width, searchMat.Height);
matchResult.MatchItems.Add(matchItem);
//屏蔽已筛选区域
if (matchModes == TemplateMatchModes.SqDiff || matchModes == TemplateMatchModes.SqDiffNormed)
{
Cv2.FloodFill(resultMat, topLeft, double.MaxValue);
}
else
{
Cv2.FloodFill(resultMat, topLeft, double.MinValue);
}
}
matchResult.Success = matchResult.MatchItems.Any();
return(matchResult);
}
/// <summary>
/// 预览模版匹配结果（仅在开启了<see cref="MatchArgument.PreviewMatchResult"/>配置时）
/// </summary>
/// <param name="argument"></param>
/// <param name="matchResult"></param>
/// <param name="sourceImage"></param>
internal static void PreviewDebugTemplateMatchResult(this MatchArgument argument, TemplateMatchResult matchResult, Mat sourceImage)
{
if (!argument.IsExtensionConfigEnabled(MatchArgument.PreviewMatchResult))
{
return;
}
using var image = new Mat(sourceImage, 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);
}
}
PreviewMatchResultImage(image);
}