C# - 影像處理 RotateBicubic() 做圖片旋轉

練習：

• 使用 RotateBicubic() 讓圖片旋轉 30 度角。
• 加入 Stopwatch() 顯示圖片處理所花的時間。

##ReadMore##

Step1. 檔案 → 新增專案 → Windows Form 應用程式 → 拉物件 Form1.cs[設計] → 撰寫 Form1.cs

Step2. 方案總管 → 參考 → 右鍵加入參考 → 瀏灠(預設路徑) C:\Program Files (x86)\AForge.NET\Framework\Release → 加入參考：

• AForge.Imaging.dll 
• AForge.Imaging.Formats.dll

Step3. 使用測試圖片：

Step4. Windows Form 拉入需要工具：

• pictureBox × 2
• button × 2
• textBox × 1
• openFileDialog × 1

Step5. Coding

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

using AForge.Imaging;
using AForge.Imaging.Formats;
using AForge.Imaging.Filters;
using System.Diagnostics;

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

        Bitmap imgone;
        Stopwatch stopWatch = new Stopwatch();

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "所有檔案(*.*)|*.*";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                imgone = ImageDecoder.DecodeFromFile(openFileDialog1.FileName);
                pictureBox1.Image = imgone;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            stopWatch.Reset();
            stopWatch.Start();

            RotateBicubic filter = new RotateBicubic(30, true);

            Bitmap rotateImg = filter.Apply(imgone);
            pictureBox2.Image = rotateImg;

            stopWatch.Stop();
            TimeSpan ti = new TimeSpan();
            textBox1.Text = ti.ToString();
        }
    }
}