基于C#技术实现身份证识别功能

/// <summary>/// 上传图片/// </summary>/// <returns></returns>public static string CardUpload(){try{string appkey = "网站自己申请的key"; //配置您申请的appkey HttpPostedFile file = HttpContext.Current.Request.Files[0];string url = "http://api2.juheapi.com/cardrecon/upload";var parameters = new Dictionary<string, string>();parameters.Add("key", appkey);parameters.Add("cardType", "2");string result = HttpPostData(url, 60000, "pic", file.InputStream, parameters);JObject info = JObject.Parse(JObject.Parse(result)["result"].ToString());var cardInfo = new{name = info["姓名"],card = info["公民身份号码"]};return cardInfo.ToJson();}catch (Exception ex){return ex.ToString();}}/// <summary>/// Post调用API/// </summary>/// <param name="url">api地址</param>/// <param name="timeOut">访问超时时间</param>/// <param name="fileKeyName">文件参数名</param>/// <param name="file">文件流</param>/// <param name="stringDict">参数列表</param>/// <returns>结果集</returns>private static string HttpPostData(string url, int timeOut, string fileKeyName,Stream file, Dictionary<string, string> stringDict){string responseContent;var memStream = new MemoryStream();var webRequest = (HttpWebRequest)WebRequest.Create(url);// 边界符var boundary = "---------------" + DateTime.Now.Ticks.ToString("x");// 边界符var beginBoundary = Encoding.ASCII.GetBytes("--" + boundary + "/r/n");// 最后的结束符var endBoundary = Encoding.ASCII.GetBytes("--" + boundary + "--/r/n");// 设置属性webRequest.Method = "POST";webRequest.Timeout = timeOut;webRequest.ContentType = "multipart/form-data; boundary=" + boundary;//写入开始边界符memStream.Write(beginBoundary, 0, beginBoundary.Length);// 写入文件const string filePartHeader ="Content-Disposition: form-data; name=/"{0}/"; filename=/"{1}/"/r/n" +"Content-Type: application/octet-stream/r/n/r/n";var header = string.Format(filePartHeader, fileKeyName, "card.jpg");var headerbytes = Encoding.UTF8.GetBytes(header);memStream.Write(headerbytes, 0, headerbytes.Length);file.CopyTo(memStream);// 写入字符串的Keyvar stringKeyHeader = "/r/n--" + boundary +"/r/nContent-Disposition: form-data; name=/"{0}/"" +"/r/n/r/n{1}/r/n";foreach (byte[] formitembytes in from string key in stringDict.Keysselect string.Format(stringKeyHeader, key, stringDict[key])into formitemselect Encoding.UTF8.GetBytes(formitem)){memStream.Write(formitembytes, 0, formitembytes.Length);}// 写入最后的结束边界符memStream.Write(endBoundary, 0, endBoundary.Length);webRequest.ContentLength = memStream.Length;// 构造完毕，执行POST方法var requestStream = webRequest.GetRequestStream();memStream.Position = 0;var tempBuffer = new byte[memStream.Length];memStream.Read(tempBuffer, 0, tempBuffer.Length);memStream.Close();requestStream.Write(tempBuffer, 0, tempBuffer.Length);requestStream.Close();var httpWebResponse = (HttpWebResponse)webRequest.GetResponse();using (var httpStreamReader = new StreamReader(httpWebResponse.GetResponseStream(),Encoding.GetEncoding("utf-8"))){responseContent = httpStreamReader.ReadToEnd();}httpWebResponse.Close();webRequest.Abort();return responseContent;}

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 Emgu.CV;using Emgu.CV.OCR;using Emgu.CV.Structure;using System.IO;namespace ImageManage{public partial class Form1 : Form{Image<Gray, Byte> imageThreshold;public Form1(){InitializeComponent();}private void btn_convert_Click(object sender, EventArgs e){//第一个参数是语言包文件夹的地址，不写默认在执行文件夹下Tesseract _ocr = new Tesseract("", "chi_sim", OcrEngineMode.TesseractOnly);_ocr.Recognize(imageThreshold);String text = _ocr.GetText();this.textBox1.Text = text;}private void pictureBox1_Click(object sender, EventArgs e){OpenFileDialog of = new OpenFileDialog();of.Title = "请选择图片";if (of.ShowDialog() == DialogResult.OK){string file = of.FileName;Image img = Image.FromFile(file);pictureBox1.Image = img; }Bitmap bitmap = (Bitmap)this.pictureBox1.Image;Image<Bgr, Byte> imageSource = new Image<Bgr, byte>(bitmap);Image<Gray, Byte> imageGrayscale = imageSource.Convert<Gray, Byte>();imageGrayscale = randon(imageGrayscale);imageThreshold = imageGrayscale.ThresholdBinary(new Gray(100), new Gray(255));this.pictureBox2.Image = imageThreshold.ToBitmap();}/// <summary>/// 旋转校正/// </summary>/// <param name="imageInput"></param>/// <returns></returns>private Image<Gray, Byte> randon(Image<Gray, Byte> imageInput)//图像投影旋转法倾斜校正子函数定义{int nwidth = imageInput.Width;int nheight = imageInput.Height;int sum;int SumOfCha;int SumOfChatemp = 0;int[] sumhang = new int[nheight];Image<Gray, Byte> resultImage = imageInput;Image<Gray, Byte> ImrotaImage;//20度范围内的调整for (int ang = -20; ang < 20; ang = ang + 1){ImrotaImage = imageInput.Rotate(ang, new Gray(1));for (int i = 0; i < nheight; i++){sum = 0;for (int j = 0; j < nwidth; j++){sum += ImrotaImage.Data[i, j, 0];}sumhang[i] = sum;}SumOfCha = 0;for (int k = 0; k < nheight - 1; k++){SumOfCha = SumOfCha + (Math.Abs(sumhang[k] - sumhang[k + 1]));}if (SumOfCha > SumOfChatemp){resultImage = ImrotaImage;SumOfChatemp = SumOfCha;}}return resultImage;}}}

StringBuilder sb = new StringBuilder();MODI.Document doc = new MODI.Document();doc.Create(fullFileName);MODI.Image image;MODI.Layout layout;doc.OCR(MODI.MiLANGUAGES.miLANG_CHINESE_SIMPLIFIED, true, true); // 识别文字类型for (int i = 0; i < doc.Images.Count; i++){image = (MODI.Image)doc.Images[i];layout = image.Layout;sb.Append(layout.Text);}