/// <summary>
/// 取得對應出物體的ROI座標點
/// </summary>
/// <param name="homography">保存了相關匹配後的資訊(用來投影至商品上的匹配位置)</param>
/// <param name="template">樣板特徵類別</param>
/// <returns>回傳座標點</returns>
public static PointF[] GetMatchBoundingBox(HomographyMatrix homography, SURFFeatureData template)
{
if (homography != null) //Get RoI box
{
//draw a rectangle along the projected model
PointF[] pts = new PointF[] {
new PointF(template.GetImg().ROI.Left, template.GetImg().ROI.Bottom),
new PointF(template.GetImg().ROI.Right, template.GetImg().ROI.Bottom),
new PointF(template.GetImg().ROI.Right, template.GetImg().ROI.Top),
new PointF(template.GetImg().ROI.Left, template.GetImg().ROI.Top)
};
homography.ProjectPoints(pts); //project points
return(pts);
}
else
{
return(null);
}
}
/// <summary>
/// 顯示畫出匹配的視窗
/// </summary>
/// <param name="matchData">匹配後回傳的資料類別</param>
/// <param name="observedScene">觀察景象特徵資料</param>
public static void ShowSURFMatchForm(SURFMatchedData matchData, SURFFeatureData observedScene)
{
PointF[] matchPts = GetMatchBoundingBox(matchData.GetHomography(), matchData.GetTemplateSURFData());
//Draw the matched keypoints
Image <Bgr, Byte> result = Features2DToolbox.DrawMatches(matchData.GetTemplateSURFData().GetImg(), matchData.GetTemplateSURFData().GetKeyPoints(), observedScene.GetImg(), observedScene.GetKeyPoints(),
matchData.GetIndices(), new Bgr(255, 255, 255), new Bgr(255, 255, 255), matchData.GetMask(), Features2DToolbox.KeypointDrawType.DEFAULT);
if (matchPts != null)
{
result.DrawPolyline(Array.ConvertAll <PointF, Point>(matchPts, Point.Round), true, new Bgr(Color.Red), 2);
}
new ImageViewer(result, "顯示匹配圖像").Show();
}
