Samuele E. Locatelli
123 lines
3.9 KiB
C#
123 lines
3.9 KiB
C#
using OpenCvSharp;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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namespace Thermo.Cam.Utils
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{
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public class PerspTrans
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{
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#region Private Fields
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private Point2f[] dstPoints = new Point2f[] {
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new Point2f(600, 0),
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new Point2f(0, 0),
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new Point2f(0, 400),
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new Point2f(600, 400),
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};
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private Point2f[] srcPoints = new Point2f[] {
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new Point2f(300, 0),
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new Point2f(0, 0),
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new Point2f(0, 200),
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new Point2f(300, 200),
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};
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#endregion Private Fields
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#region Protected Fields
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protected Mat OriginalImage;
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#endregion Protected Fields
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#region Public Constructors
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public PerspTrans(List<System.Drawing.Point> _srcPoints, List<System.Drawing.Point> _dstPoints)
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{
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srcPoints = convDraw2CV(_srcPoints);
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dstPoints = convDraw2CV(_dstPoints);
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}
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#endregion Public Constructors
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#region Protected Methods
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/// <summary>
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/// Conversione array di punti Point2f --> System.Drawings
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/// </summary>
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/// <param name="origList"></param>
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/// <returns></returns>
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protected List<System.Drawing.Point> convCV2Draw(Point2f[] origList)
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{
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List<System.Drawing.Point> answ = origList.Select(item => new System.Drawing.Point() { X = (int)item.X, Y = (int)item.Y }).ToList();
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return answ;
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}
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/// <summary>
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/// Conversione array di punti System.Drawings --> Point2f
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/// </summary>
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/// <param name="origList"></param>
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/// <returns></returns>
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protected Point2f[] convDraw2CV(List<System.Drawing.Point> origList)
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{
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Point2f[] answ = origList.Select(item => new Point2f(item.X, item.Y)).ToArray();
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return answ;
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}
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#endregion Protected Methods
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#region Public Methods
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// This is the function that converts IplImage image
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// into Bitmap
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public static Bitmap MatToBitmap(Mat image)
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{
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return OpenCvSharp.Extensions.BitmapConverter.ToBitmap(image);
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}
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public Bitmap convertImage(Bitmap OrigImage, int dimX, int dimY)
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{
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Bitmap answ = OrigImage;
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OriginalImage = OpenCvSharp.Extensions.BitmapConverter.ToMat(OrigImage);
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// verifica siano 4 sorgente e 4 dest...
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if (srcPoints.Length == 4 && dstPoints.Length == 4)
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{
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using var matrix = Cv2.GetPerspectiveTransform(srcPoints, dstPoints);
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using var dst = new Mat(new OpenCvSharp.Size(dimX, dimY), MatType.CV_8UC3);
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Cv2.WarpPerspective(OriginalImage, dst, matrix, dst.Size());
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answ = MatToBitmap(dst);
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}
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return answ;
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}
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/// <summary>
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/// Calcola antitrasformata x il punto dallo spazio di destinazione a quello di origine (secondo matrice di trasformazione)
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/// </summary>
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/// <param name="reqPointDest">Punto nelle corrd dello spazio DEST</param>
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/// <returns></returns>
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public List<System.Drawing.Point> getReversedPoint(List<System.Drawing.Point> reqPointDest)
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{
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List<System.Drawing.Point> answ = new List<System.Drawing.Point>();
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// trasformo
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var puntiDest = convDraw2CV(reqPointDest);
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if (srcPoints.Length == 4 && dstPoints.Length == 4)
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{
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using var matrix = Cv2.GetPerspectiveTransform(srcPoints, dstPoints);
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var puntiOrig = Cv2.PerspectiveTransform(puntiDest, matrix);
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if (puntiOrig.Count() > 0)
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{
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answ = convCV2Draw(puntiOrig);
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}
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}
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return answ;
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}
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#endregion Public Methods
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}
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} |