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PP-OCRv5

backend 2025/8/4 18:12:55

PP-OCRv5官方效果如下

C++封装、C#调用效果

项目

代码

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PP-OCRv5官方效果如下

C++封装、C#调用效果

项目

代码

using Newtonsoft.Json;
using OpenCvSharp;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace OCRV5Test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

const string DllName = "lw.PPOCRSharp.dll";

//初始化
[DllImport(DllName, EntryPoint = "init", CallingConvention = CallingConvention.StdCall)]
public extern static int init(ref IntPtr engine
, int cpu_threads
, bool enable_mkldnn

, string det_model_dir
, int limit_side_len
, double det_db_thresh
, double det_db_box_thresh
, double det_db_unclip_ratio
, bool use_dilation

, bool cls
, bool use_angle_cls
, string cls_model_dir
, double cls_thresh
, double cls_batch_num

, string rec_model_dir
, string rec_char_dict_path
, int rec_batch_num
, int rec_img_h
, int rec_img_w

, StringBuilder msg);

//识别
[DllImport(DllName, EntryPoint = "ocr", CallingConvention = CallingConvention.StdCall)]
public extern static int ocr(IntPtr engine, IntPtr image, StringBuilder msg, out IntPtr ocr_result, out int ocr_result_len);

//释放
[DllImport(DllName, EntryPoint = "destroy", CallingConvention = CallingConvention.StdCall)]
public extern static int destroy(IntPtr engine, StringBuilder msg);

static IntPtr OCREngine;

private Bitmap bmp;

private String imgPath = null;

private List<OCRResult> ltOCRResult;

private string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tif;*.png";

private StringBuilder OCRResultInfo = new StringBuilder();
private StringBuilder OCRResultAllInfo = new StringBuilder();

Pen pen = new Pen(Brushes.Red, 2f);

private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = fileFilter;
if (ofd.ShowDialog() == DialogResult.OK)
{
imgPath = ofd.FileName;
bmp = new Bitmap(imgPath);
pictureBox1.Image = bmp;
richTextBox1.Clear();

button2_Click(null, null);
}
}

private void button2_Click(object sender, EventArgs e)
{

if (imgPath == null)
{
return;
}
button1.Enabled = false;
button2.Enabled = false;
richTextBox1.Clear();
OCRResultInfo.Clear();
OCRResultAllInfo.Clear();

Application.DoEvents();

Mat img = new Mat(imgPath);
StringBuilder msgTemp = new StringBuilder(128);
StringBuilder ocrResultStr = new StringBuilder(1024 * 100);

Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();

IntPtr strPtr;
int ocr_result_len = 0;

int res = ocr(OCREngine, img.CvPtr, msgTemp, out strPtr, out ocr_result_len);
byte[] buffer = new byte[ocr_result_len];
Marshal.Copy(strPtr, buffer, 0, ocr_result_len);
string ocr_result = Encoding.UTF8.GetString(buffer);
Marshal.FreeCoTaskMem(strPtr);
//Console.WriteLine(ocr_result);
stopwatch.Stop();
double totalTime = stopwatch.Elapsed.TotalSeconds;

OCRResultAllInfo.AppendLine($"耗时: {totalTime:F2}s");
OCRResultAllInfo.AppendLine("---------------------------");

OCRResultInfo.AppendLine($"耗时: {totalTime:F2}s");
OCRResultInfo.AppendLine("---------------------------");

if (res == 0)
{

ltOCRResult = Newtonsoft.Json.JsonConvert.DeserializeObject<List<OCRResult>>(ocr_result);
OCRResultAllInfo.Append(JsonConvert.SerializeObject(ltOCRResult, Newtonsoft.Json.Formatting.Indented));
Graphics graphics = Graphics.FromImage(bmp);

foreach (OCRResult item in ltOCRResult)
{
OCRResultInfo.AppendLine(item.text);
System.Drawing.Point[] pt = new System.Drawing.Point[] {
new System.Drawing.Point(item.x1, item.y1)
, new System.Drawing.Point(item.x2, item.y2)
, new System.Drawing.Point(item.x3, item.y3)
, new System.Drawing.Point(item.x4, item.y4)
};
graphics.DrawPolygon(pen, pt);
}
graphics.Dispose();

if (checkBox1.Checked)
{
richTextBox1.Text = OCRResultAllInfo.ToString();
}
else
{
richTextBox1.Text = OCRResultInfo.ToString();
}

pictureBox1.Image = null;
pictureBox1.Image = bmp;
}
else
{
MessageBox.Show("识别失败，" + msgTemp.ToString());
}

img.Release();
button1.Enabled = true;
button2.Enabled = true;
}

/// <summary>
/// 初始化
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_Load(object sender, EventArgs e)
{
radioButton1.Checked = true;
}

void LoadModel()
{

StringBuilder msgTemp = new StringBuilder(128);
string root_dir = Application.StartupPath + @"\inference";

int cpu_threads = Environment.ProcessorCount + 2;
bool enable_mkldnn = true;

string det_model_dir = "";
int limit_side_len = 960;
double det_db_thresh = 0.3;
double det_db_box_thresh = 0.6;
double det_db_unclip_ratio = 1.2;
bool use_dilation = false;

bool cls = false;
bool use_angle_cls = true;
string cls_model_dir = root_dir + @"\ch_ppocr_mobile_v2.0_cls_infer\";
double cls_thresh = 0.9;
int cls_batch_num = 1;

string rec_model_dir = "";
string rec_char_dict_path = root_dir + @"\ppocrv5_dict.txt";
int rec_batch_num = Environment.ProcessorCount;
int rec_img_h = 48;
int rec_img_w = 320;

if (radioButton1.Checked)
{
det_model_dir = root_dir + @"\PP-OCRv5_mobile_det_infer\";
rec_model_dir = root_dir + @"\PP-OCRv5_mobile_rec_infer\";
}
else
{
det_model_dir = root_dir + @"\PP-OCRv5_server_det_infer\";
rec_model_dir = root_dir + @"\PP-OCRv5_server_rec_infer\";
}
int res = init(ref OCREngine
, cpu_threads
, enable_mkldnn

, det_model_dir
, limit_side_len
, det_db_thresh
, det_db_box_thresh
, det_db_unclip_ratio
, use_dilation

, cls
, use_angle_cls
, cls_model_dir
, cls_thresh
, cls_batch_num

, rec_model_dir
, rec_char_dict_path
, rec_batch_num
, rec_img_h
, rec_img_w

, msgTemp);

if (res == 0)
{
MessageBox.Show("模型加载成功！");
}
else
{
string msg = msgTemp.ToString();
MessageBox.Show("模型加载失败，" + msg);
}
}

private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
richTextBox1.Clear();
if (checkBox1.Checked)
{
richTextBox1.Text = OCRResultAllInfo.ToString();
}
else
{
richTextBox1.Text = OCRResultInfo.ToString();
}
}

private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
RadioButton rb = sender as RadioButton;
if (rb != null && rb.Checked)
{
//MessageBox.Show("选中的是：" + rb.Text);
LoadModel();
}
}
}

}

using Newtonsoft.Json;
using OpenCvSharp;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;namespace OCRV5Test
{public partial class Form1 : Form{public Form1(){InitializeComponent();}const string DllName = "lw.PPOCRSharp.dll";//初始化[DllImport(DllName, EntryPoint = "init", CallingConvention = CallingConvention.StdCall)]public extern static int init(ref IntPtr engine, int cpu_threads, bool enable_mkldnn, string det_model_dir, int limit_side_len, double det_db_thresh, double det_db_box_thresh, double det_db_unclip_ratio, bool use_dilation, bool cls, bool use_angle_cls, string cls_model_dir, double cls_thresh, double cls_batch_num, string rec_model_dir, string rec_char_dict_path, int rec_batch_num, int rec_img_h, int rec_img_w, StringBuilder msg);//识别[DllImport(DllName, EntryPoint = "ocr", CallingConvention = CallingConvention.StdCall)]public extern static int ocr(IntPtr engine, IntPtr image, StringBuilder msg, out IntPtr ocr_result, out int ocr_result_len);//释放[DllImport(DllName, EntryPoint = "destroy", CallingConvention = CallingConvention.StdCall)]public extern static int destroy(IntPtr engine, StringBuilder msg);static IntPtr OCREngine;private Bitmap bmp;private String imgPath = null;private List<OCRResult> ltOCRResult;private string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tif;*.png";private StringBuilder OCRResultInfo = new StringBuilder();private StringBuilder OCRResultAllInfo = new StringBuilder();Pen pen = new Pen(Brushes.Red, 2f);private void button1_Click(object sender, EventArgs e){OpenFileDialog ofd = new OpenFileDialog();ofd.Filter = fileFilter;if (ofd.ShowDialog() == DialogResult.OK){imgPath = ofd.FileName;bmp = new Bitmap(imgPath);pictureBox1.Image = bmp;richTextBox1.Clear();button2_Click(null, null);}}private void button2_Click(object sender, EventArgs e){if (imgPath == null){return;}button1.Enabled = false;button2.Enabled = false;richTextBox1.Clear();OCRResultInfo.Clear();OCRResultAllInfo.Clear();Application.DoEvents();Mat img = new Mat(imgPath);StringBuilder msgTemp = new StringBuilder(128);StringBuilder ocrResultStr = new StringBuilder(1024 * 100);Stopwatch stopwatch = new Stopwatch();stopwatch.Start();IntPtr strPtr;int ocr_result_len = 0;int res = ocr(OCREngine, img.CvPtr, msgTemp, out strPtr, out ocr_result_len);byte[] buffer = new byte[ocr_result_len];Marshal.Copy(strPtr, buffer, 0, ocr_result_len);string ocr_result = Encoding.UTF8.GetString(buffer);Marshal.FreeCoTaskMem(strPtr);//Console.WriteLine(ocr_result);stopwatch.Stop();double totalTime = stopwatch.Elapsed.TotalSeconds;OCRResultAllInfo.AppendLine($"耗时: {totalTime:F2}s");OCRResultAllInfo.AppendLine("---------------------------");OCRResultInfo.AppendLine($"耗时: {totalTime:F2}s");OCRResultInfo.AppendLine("---------------------------");if (res == 0){ltOCRResult = Newtonsoft.Json.JsonConvert.DeserializeObject<List<OCRResult>>(ocr_result);OCRResultAllInfo.Append(JsonConvert.SerializeObject(ltOCRResult, Newtonsoft.Json.Formatting.Indented));Graphics graphics = Graphics.FromImage(bmp);foreach (OCRResult item in ltOCRResult){OCRResultInfo.AppendLine(item.text);System.Drawing.Point[] pt = new System.Drawing.Point[] {new System.Drawing.Point(item.x1, item.y1), new System.Drawing.Point(item.x2, item.y2), new System.Drawing.Point(item.x3, item.y3), new System.Drawing.Point(item.x4, item.y4)};graphics.DrawPolygon(pen, pt);}graphics.Dispose();if (checkBox1.Checked){richTextBox1.Text = OCRResultAllInfo.ToString();}else{richTextBox1.Text = OCRResultInfo.ToString();}pictureBox1.Image = null;pictureBox1.Image = bmp;}else{MessageBox.Show("识别失败，" + msgTemp.ToString());}img.Release();button1.Enabled = true;button2.Enabled = true;}/// <summary>/// 初始化/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void Form1_Load(object sender, EventArgs e){radioButton1.Checked = true;}void LoadModel(){StringBuilder msgTemp = new StringBuilder(128);string root_dir = Application.StartupPath + @"\inference";int cpu_threads = Environment.ProcessorCount + 2;bool enable_mkldnn = true;string det_model_dir = "";int limit_side_len = 960;double det_db_thresh = 0.3;double det_db_box_thresh = 0.6;double det_db_unclip_ratio = 1.2;bool use_dilation = false;bool cls = false;bool use_angle_cls = true;string cls_model_dir = root_dir + @"\ch_ppocr_mobile_v2.0_cls_infer\";double cls_thresh = 0.9;int cls_batch_num = 1;string rec_model_dir = "";string rec_char_dict_path = root_dir + @"\ppocrv5_dict.txt";int rec_batch_num = Environment.ProcessorCount;int rec_img_h = 48;int rec_img_w = 320;if (radioButton1.Checked){det_model_dir = root_dir + @"\PP-OCRv5_mobile_det_infer\";rec_model_dir = root_dir + @"\PP-OCRv5_mobile_rec_infer\";}else{det_model_dir = root_dir + @"\PP-OCRv5_server_det_infer\";rec_model_dir = root_dir + @"\PP-OCRv5_server_rec_infer\";}int res = init(ref OCREngine, cpu_threads, enable_mkldnn, det_model_dir, limit_side_len, det_db_thresh, det_db_box_thresh, det_db_unclip_ratio, use_dilation, cls, use_angle_cls, cls_model_dir, cls_thresh, cls_batch_num, rec_model_dir, rec_char_dict_path, rec_batch_num, rec_img_h, rec_img_w, msgTemp);if (res == 0){MessageBox.Show("模型加载成功！");}else{string msg = msgTemp.ToString();MessageBox.Show("模型加载失败，" + msg);}}private void checkBox1_CheckedChanged(object sender, EventArgs e){richTextBox1.Clear();if (checkBox1.Checked){richTextBox1.Text = OCRResultAllInfo.ToString();}else{richTextBox1.Text = OCRResultInfo.ToString();}}private void radioButton1_CheckedChanged(object sender, EventArgs e){RadioButton rb = sender as RadioButton;if (rb != null && rb.Checked){//MessageBox.Show("选中的是：" + rb.Text);LoadModel();}}}}