效果

項目

VS2022+.net4.8+ OpenCvSharp4+Sdcb.RotationDetector

代碼 using OpenCvSharp;using Sdcb.RotationDetector;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;namespace RotationDetector_圖片旋轉角度檢測{ public partial Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { startupPath = Application.StartupPath; rd = new PaddleRotationDetector(RotationDetectionModel.EmbeddedDefault); } Bitmap bmp; string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png"; string img = ""; string startupPath = ""; DateTime dt1 = DateTime.Now; DateTime dt2 = DateTime.Now; PaddleRotationDetector rd; private void button1_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = fileFilter;if (ofd.ShowDialog() != DialogResult.OK) return; pictureBox1.Image = ; img = ofd.FileName; bmp = new Bitmap(img); pictureBox1.Image = new Bitmap(img); textBox1.Text = ""; } private void button2_Click(object sender, EventArgs e) {if (img=="") { return; } Mat src = OpenCvSharp.Extensions.BitmapConverter.ToMat(new Bitmap(pictureBox1.Image)); Cv2.CvtColor(src, src, ColorConversionCodes.RGBA2RGB);//mat轉三通道mat dt1 = DateTime.Now; RotationResult r = rd.Run(src); dt2 = DateTime.Now; StringBuilder sb = new StringBuilder(); sb.AppendLine("圖片旋轉角度："+ r.Rotation ); sb.AppendLine("--------------------"); sb.AppendLine("耗時:" + (dt2 - dt1).TotalMilliseconds + "ms"); textBox1.Text = sb.ToString(); } /// <summary> /// 90 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button3_Click(object sender, EventArgs e) {if (bmp==) {return; } var mat = OpenCvSharp.Extensions.BitmapConverter.ToMat(bmp); Cv2.CvtColor(mat, mat, ColorConversionCodes.RGBA2RGB); Cv2.Rotate(mat, mat, RotateFlags.Rotate90Clockwise); var bitmap = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(mat); pictureBox1.Image = bitmap; } /// <summary> /// 180 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button4_Click(object sender, EventArgs e) {if (bmp == ) {return; } var mat = OpenCvSharp.Extensions.BitmapConverter.ToMat(bmp); Cv2.CvtColor(mat, mat, ColorConversionCodes.RGBA2RGB); Cv2.Rotate(mat, mat, RotateFlags.Rotate180); var bitmap = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(mat); pictureBox1.Image = bitmap; } /// <summary> /// 270 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button5_Click(object sender, EventArgs e) {if (bmp == ) {return; } var mat = OpenCvSharp.Extensions.BitmapConverter.ToMat(bmp); Cv2.CvtColor(mat, mat, ColorConversionCodes.RGBA2RGB); Cv2.Rotate(mat, mat, RotateFlags.Rotate90Counterclockwise); var bitmap = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(mat); pictureBox1.Image = bitmap; } }}參考 https://github.com/sdcb/PaddleSharp