Affine変換で画像を回転させてみる

まずは、ボタンを押すと回転された画像をpicture boxに表示するFormアプリを作ってみます。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using OpenCvSharp;
using OpenCvSharp.CPlusPlus;
using OpenCvSharp.Extensions;


namespace _06_affineRot
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button_disp_Click(object sender, EventArgs e)
        {
            Mat matImage = new Mat(@"C:\Users\hoge\hogehoge.jpg");
            Mat procImage = new Mat();

            // とりあえずリサイズしてみた
            Cv2.Resize(matImage, procImage, new CvSize(320,240));

            // affine変換で回転させてみる
            Point2f center = new Point2f(procImage.Width / 2, procImage.Height / 2);
            double angle = -40.0;
            double scale = 1.0;
            Mat affineMatrix = Cv2.GetRotationMatrix2D(center, angle, scale);
            Cv2.WarpAffine(procImage, procImage, affineMatrix, procImage.Size());

            // 表示用bitmap変換
            Image dispImage = BitmapConverter.ToBitmap(procImage);

            pictureBox1.Image = dispImage;

        }
    }
}