百度OCR身份证识别C++离线SDKV3.0 C#对接
目录
说明
效果
问题
项目
代码
下载
说明
自己根据SDK封装了动态库，然后C#调用。
SDK 简介
本 SDK 适应于于 Windows 平台下的⾝份证识别系统,⽀持 C++接⼜开发的 SDK,开发者可在VS2015 下⾯进⾏开发（推荐使⽤，不保证其他版本 VS 都兼容）。SDK 采⽤ C++的动态库 DLL 的⽅式，另外随 SDK 附带⼀个鉴权激活⼯具（LicenseTool.exe，在license_tool ⽬录），通过该激活⼯具可⽣成正常接 ⼊SDK 的激活 license ⽂件 license.zip(解压后可⽣成两个⽂件 license.ini 和license.key)达到通过鉴权， 正常使⽤SDK 的⽬的。
激活工具授权
鉴权采⽤ SDK 附带的鉴权⼯具 LicenseTool.exe、双击打开 exe 后，输⼊申请获取到的授权序列号，执⾏按钮激活后会⽣成⼀个 license.zip ⽂件，把这个⽂件解压后会⽣成 license.ini 和 license.key两个⽂件，把这 2 个⽂件放置到 SDK 的 license ⽂件夹，即可通过授权激活。另外⽀持鉴权⽂件路径定制化及模型⽂件路径定制化,可参考 SDK 示例（鉴权⽂件 license.key 和 license.ini 的路径可参考SDK 代码示例，也可以⽤ SDK 现成的默认路径）。鉴权⼯具 LicenseTool.exe 如下所示，在⼯具中输⼊申请得到的 license 系列号即可⽣成鉴权 zip ⽂件。解压 zip 后可⽣成 license.ini 和 license.key 两个⽂件。
SDK包结构
效果
问题
返回的坐标位置有问题，猜测可能是内部缩放了图片导致，后续等官方修复。
项目
代码
using Newtonsoft.Json;
using OpenCvSharp;
using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Text;
using System.Windows.Forms;
using WinFormTest.Common;
namespace WinFormTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
IntPtr IDCard;
int res = -1;
private void Form1_Load(object sender, EventArgs e)
{
IDCard = Native.create();
string key = "";
string licenseKeyPath = Application.StartupPath + "\\license\\license.key";
string licenseFile = Application.StartupPath + "\\license\\license.ini";
key = File.ReadAllText(licenseKeyPath);
res = Native.auth_from_file(IDCard, key, licenseFile, false);
string model_folder = Application.StartupPath + "\\resource";
res = Native.sdk_init(IDCard, model_folder);
image_path = Application.StartupPath + "\\idcard_.jpg";
pictureBox1.Image = new Bitmap(image_path);
}
private void button1_Click(object sender, EventArgs e)
{
if (image_path == "")
{
return;
}
textBox1.Text = "";
Application.DoEvents();
Mat image = new Mat(image_path);
StringBuilder ocr_result1 = new StringBuilder(1024);
StringBuilder ocr_result2 = new StringBuilder(2048);
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
res = Native.ocr2(IDCard, image.CvPtr, ocr_result1, ocr_result2);
string s = ocr_result1.ToString();
string s2 = ocr_result2.ToString();
stopwatch.Stop();
double totalTime = stopwatch.Elapsed.TotalSeconds;
textBox1.Text += $"耗时: {totalTime:F2}s";
textBox1.Text += "\r\n-------------------\r\n";
if (res == 0)
{
Object jsonObject = JsonConvert.DeserializeObject(ocr_result1.ToString());
textBox1.Text += JsonConvert.SerializeObject(jsonObject, Newtonsoft.Json.Formatting.Indented);
textBox1.Text += "\r\n-------------------\r\n";
Object jsonObject2 = JsonConvert.DeserializeObject(ocr_result2.ToString());
textBox1.Text += JsonConvert.SerializeObject(jsonObject2, Newtonsoft.Json.Formatting.Indented);
IDCardRes iDCardResponse = JsonConvert.DeserializeObject<IDCardRes>(ocr_result1.ToString());
IDCardCoordRes iDCardCoordResponse = JsonConvert.DeserializeObject<IDCardCoordRes>(ocr_result2.ToString());
//if (iDCardResponse.name == "") iDCardCoordResponse.name_coord = "";
//if (iDCardResponse.gender == "") iDCardCoordResponse.gender_coord = "";
//if (iDCardResponse.ethnicity == "") iDCardCoordResponse.ethnicity_coord = "";
//if (iDCardResponse.birth == "") iDCardCoordResponse.birth_coord = "";
//if (iDCardResponse.address == "") iDCardCoordResponse.address_coord = "";
//if (iDCardResponse.id_number == "") iDCardCoordResponse.id_number_coord = "";
//if (iDCardResponse.authority == "") iDCardCoordResponse.authority_coord = "";
//if (iDCardResponse.issuing_date == "") iDCardCoordResponse.issuing_date_coord = "";
//if (iDCardResponse.expiry_date == "") iDCardCoordResponse.expiry_date_coord = "";
if (iDCardResponse.name != "")
{
DrawRes(image, iDCardCoordResponse.name_coord);
}
if (iDCardResponse.gender != "")
{
DrawRes(image, iDCardCoordResponse.gender_coord);
}
if (iDCardResponse.ethnicity != "")
{
DrawRes(image, iDCardCoordResponse.ethnicity_coord);
}
if (iDCardResponse.birth != "")
{
DrawRes(image, iDCardCoordResponse.birth_coord);
}
if (iDCardResponse.address != "")
{
DrawRes(image, iDCardCoordResponse.address_coord);
}
if (iDCardResponse.id_number != "")
{
DrawRes(image, iDCardCoordResponse.id_number_coord);
}
if (iDCardResponse.authority != "")
{
DrawRes(image, iDCardCoordResponse.authority_coord);
}
if (iDCardResponse.issuing_date != "")
{
DrawRes(image, iDCardCoordResponse.issuing_date_coord);
}
if (iDCardResponse.expiry_date != "")
{
DrawRes(image, iDCardCoordResponse.expiry_date_coord);
}
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
pictureBox1.Image = null;
}
pictureBox1.Image = new Bitmap(image.ToMemoryStream());
image.Dispose();
}
else
{
textBox1.Text = "识别失败";
}
}
void DrawRes(Mat res_image, string ptsStr)
{
string[] pts = ptsStr.Split(' ');
//多边形的顶点
OpenCvSharp.Point[] points = new OpenCvSharp.Point[]
{
new OpenCvSharp.Point(Convert.ToDouble( pts[0]), Convert.ToDouble( pts[1])),
new OpenCvSharp.Point(Convert.ToDouble( pts[2]), Convert.ToDouble( pts[3])),
new OpenCvSharp.Point(Convert.ToDouble( pts[4]), Convert.ToDouble( pts[5])),
new OpenCvSharp.Point(Convert.ToDouble( pts[6]), Convert.ToDouble( pts[7])),
};
// 绘制多边形
Cv2.Polylines(res_image, new OpenCvSharp.Point[][] { points }, isClosed: true, color: new Scalar(0, 255, 0), thickness: 3);
}
void DrawRes2(Mat res_image, float[] pts)
{
//多边形的顶点
OpenCvSharp.Point[] points = new OpenCvSharp.Point[]
{
new OpenCvSharp.Point(pts[0], pts[1]),
new OpenCvSharp.Point(pts[2], pts[3]),
new OpenCvSharp.Point(pts[4], pts[5]),
new OpenCvSharp.Point(pts[6], pts[7]),
};
// 绘制多边形
Cv2.Polylines(res_image, new OpenCvSharp.Point[][] { points }, isClosed: true, color: new Scalar(0, 255, 0), thickness: 3);
}
string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
string image_path = "";
private void button2_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = fileFilter;
if (ofd.ShowDialog() != DialogResult.OK) return;
pictureBox1.Image = null;
image_path = ofd.FileName;
pictureBox1.Image = new Bitmap(image_path);
textBox1.Text = "";
}
private void button3_Click(object sender, EventArgs e)
{
if (image_path == "")
{
return;
}
textBox1.Text = "";
Application.DoEvents();
Mat image = new Mat(image_path);
IDCardResponse final_result = new IDCardResponse();
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
res = Native.ocr(IDCard, image.CvPtr, ref final_result);
stopwatch.Stop();
double totalTime = stopwatch.Elapsed.TotalSeconds;
textBox1.Text += $"耗时: {totalTime:F2}s";
textBox1.Text += "\r\n-------------------\r\n";
IDCardRes iDCardResponse = new IDCardRes();
iDCardResponse.name = Encoding.UTF8.GetString(final_result.name).Replace("\u0000", "");
iDCardResponse.gender = Encoding.UTF8.GetString(final_result.gender).Replace("\u0000", "");
iDCardResponse.ethnicity = Encoding.UTF8.GetString(final_result.ethnicity).Replace("\u0000", "");
iDCardResponse.birth = Encoding.UTF8.GetString(final_result.birth).Replace("\u0000", "");
iDCardResponse.address = Encoding.UTF8.GetString(final_result.address).Replace("\u0000", "");
iDCardResponse.id_number = Encoding.UTF8.GetString(final_result.id_number).Replace("\u0000", "");
iDCardResponse.authority = Encoding.UTF8.GetString(final_result.authority).Replace("\u0000", "");
iDCardResponse.issuing_date = Encoding.UTF8.GetString(final_result.issuing_date).Replace("\u0000", "");
iDCardResponse.expiry_date = Encoding.UTF8.GetString(final_result.expiry_date).Replace("\u0000", "");
textBox1.Text += JsonConvert.SerializeObject(iDCardResponse, Newtonsoft.Json.Formatting.Indented);
textBox1.Text += "\r\n-------------------\r\n";
IDCardCoordRes2 iDCardCoordRes2 = new IDCardCoordRes2();
iDCardCoordRes2.name_coord = final_result.name_coord;
iDCardCoordRes2.gender_coord = final_result.gender_coord;
iDCardCoordRes2.birth_coord = final_result.birth_coord;
iDCardCoordRes2.address_coord = final_result.address_coord;
iDCardCoordRes2.id_number_coord = final_result.id_number_coord;
iDCardCoordRes2.ethnicity_coord = final_result.ethnicity_coord;
iDCardCoordRes2.authority_coord = final_result.authority_coord;
iDCardCoordRes2.issuing_date_coord = final_result.issuing_date_coord;
iDCardCoordRes2.expiry_date_coord = final_result.expiry_date_coord;
textBox1.Text += JsonConvert.SerializeObject(iDCardCoordRes2, Newtonsoft.Json.Formatting.Indented);
DrawRes2(image, iDCardCoordRes2.name_coord);
DrawRes2(image, iDCardCoordRes2.gender_coord);
DrawRes2(image, iDCardCoordRes2.birth_coord);
DrawRes2(image, iDCardCoordRes2.address_coord);
DrawRes2(image, iDCardCoordRes2.id_number_coord);
DrawRes2(image, iDCardCoordRes2.ethnicity_coord);
DrawRes2(image, iDCardCoordRes2.authority_coord);
DrawRes2(image, iDCardCoordRes2.issuing_date_coord);
DrawRes2(image, iDCardCoordRes2.expiry_date_coord);
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
pictureBox1.Image = null;
}
pictureBox1.Image = new Bitmap(image.ToMemoryStream());
image.Dispose();
}
}
}
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