效果

项目

VS2022+.net4.8+OCRV4

代码

using OpenCvSharp;
using Sdcb.PaddleInference;
using Sdcb.PaddleOCR;
using Sdcb.PaddleOCR.Models;
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 PaddleInference.OCRServiceV4
{public partial class frmTest : Form{public frmTest(){InitializeComponent();}String startupPath;public PaddleOcrAll paddleOcr;private string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";Bitmap bmp;PaddleOcrResult ocrResult;DateTime dt1 = DateTime.Now;DateTime dt2 = DateTime.Now;String imgPath;Mat mat;Pen pen = new Pen(Brushes.Red, 2);private void frmTest_Load(object sender, EventArgs e){comboBox1.SelectedIndex = 0;startupPath = Application.StartupPath;rbOnnx.Checked = true;}private void btnLoadModel_Click(object sender, EventArgs e){LoadModel();MessageBox.Show("加载完成");}void LoadModel(){string detectionModelDir;string classificationModelDir;string recognitionModelDir;string labelFilePath;if (comboBox1.SelectedIndex == 0){detectionModelDir = startupPath + "\\inference\\ch_PP-OCRv4_det_infer";classificationModelDir = startupPath + "\\inference\\ch_ppocr_mobile_v2.0_cls_infer";recognitionModelDir = startupPath + "\\inference\\ch_PP-OCRv4_rec_infer";labelFilePath = startupPath + "\\inference\\ppocr_keys.txt";}else{detectionModelDir = startupPath + "\\inference_server\\detv4_teacher_inference";classificationModelDir = startupPath + "\\inference_server\\ch_ppocr_mobile_v2.0_cls_infer";recognitionModelDir = startupPath + "\\inference_server\\ch_PP-OCRv4_rec_server_infer";labelFilePath = startupPath + "\\inference_server\\ppocr_keys.txt";}FullOcrModel model = FullOcrModel.FromDirectory(detectionModelDir, classificationModelDir, recognitionModelDir, labelFilePath, ModelVersion.V4);if (rbOnnx.Enabled == true){paddleOcr = new PaddleOcrAll(model, PaddleDevice.Onnx());}else if (rbOpenblas.Enabled == true){paddleOcr = new PaddleOcrAll(model, PaddleDevice.Openblas());}else if (rbMkldnn.Enabled == true){paddleOcr = new PaddleOcrAll(model, PaddleDevice.Mkldnn());}else{paddleOcr = new PaddleOcrAll(model);}paddleOcr.AllowRotateDetection = true;    /* 允许识别有角度的文字 */paddleOcr.Enable180Classification = false; /* 允许识别旋转角度大于90度的文字 */}private void btnSelect_Click(object sender, EventArgs e){if (paddleOcr == null){MessageBox.Show("请先加载模型");return;}OpenFileDialog ofd = new OpenFileDialog();ofd.Filter = fileFilter;if (ofd.ShowDialog() != DialogResult.OK) return;imgPath = ofd.FileName;bmp = new Bitmap(imgPath, true);RotateImage(bmp);pictureBox1.Image = bmp;richTextBox1.Clear();mat = new Mat(ofd.FileName);//pictureBox1.Image = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(mat);dt1 = DateTime.Now;ocrResult = paddleOcr.Run(mat);dt2 = DateTime.Now;ShowOCRResult(ocrResult);}/// <summary>/// 显示结果/// </summary>private void ShowOCRResult(PaddleOcrResult ocrResult){richTextBox1.Clear();Bitmap bitmap = (Bitmap)this.pictureBox1.Image;richTextBox1.AppendText("耗时:" + (dt2 - dt1).TotalMilliseconds + "ms\n");richTextBox1.AppendText("-----------------------------------\n");richTextBox1.AppendText(ocrResult.Text + "\n");using (Graphics g = Graphics.FromImage(bitmap)){foreach (var item in ocrResult.Regions){g.DrawRectangle(pen, item.Rect.BoundingRect().Left, item.Rect.BoundingRect().Top, item.Rect.BoundingRect().Width, item.Rect.BoundingRect().Height);}}pictureBox1.Image = null;pictureBox1.Image = bitmap;}private void button1_Click(object sender, EventArgs e){if (paddleOcr == null){MessageBox.Show("请先加载模型");return;}if (pictureBox1.Image == null){return;}richTextBox1.Clear();Application.DoEvents();dt1 = DateTime.Now;ocrResult = paddleOcr.Run(mat);dt2 = DateTime.Now;ShowOCRResult(ocrResult);}/// <summary>/// 根据图片exif调整方向/// </summary>/// <param name="img"></param>public void RotateImage(Bitmap img){var exif = img.PropertyItems;byte orien = 0;var item = exif.Where(m => m.Id == 274).ToArray();if (item.Length > 0)orien = item[0].Value[0];switch (orien){case 2:img.RotateFlip(RotateFlipType.RotateNoneFlipX);//horizontal flipbreak;case 3:img.RotateFlip(RotateFlipType.Rotate180FlipNone);//right-topbreak;case 4:img.RotateFlip(RotateFlipType.RotateNoneFlipY);//vertical flipbreak;case 5:img.RotateFlip(RotateFlipType.Rotate90FlipX);break;case 6:img.RotateFlip(RotateFlipType.Rotate90FlipNone);//right-topbreak;case 7:img.RotateFlip(RotateFlipType.Rotate270FlipX);break;case 8:img.RotateFlip(RotateFlipType.Rotate270FlipNone);//left-bottombreak;default:break;}}}
}

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