/// <summary>
/// 通用文字识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns>解析后的数据</returns>
public static string GeneralBasic(Image img, string appKey = null, string appSecret = null)
{
string ak = appKey ?? YoudaoKey.AppKey;
string secret = appSecret ?? YoudaoKey.AppSecret;
string url = "https://openapi.youdao.com/ocrapi";
string base64 = WebExt.ImageToBase64(img);
string salt = DateTime.Now.Millisecond.ToString();
string curTime = WebExt.GetTimeSpan();
string sign = ComputeHash(ak + Truncate(base64) + salt + curTime + secret);
string str = string.Format($"img={HttpUtility.UrlEncode(base64)}" +
$"&langType=auto&detectType=10012&imageType=1&appKey={ak}" +
$"&salt={salt}&sign={sign}&docType=json&signType=v3&curtime={curTime}");
string result = WebExt.Request(url, null, str);
// 解析json数据
JavaScriptSerializer js = new JavaScriptSerializer();
string json_result = GetDictResult(result);
JsonOCR list = js.Deserialize <JsonOCR>(json_result);
StringBuilder sb = new StringBuilder();
foreach (var region in list.regions)
{
foreach (var line in region.lines)
{
sb.Append(line.text + Environment.NewLine);
}
}
// 删除最后一个换行符
return(sb.ToString().TrimEnd('\r', '\n'));
}
/// <summary>
/// 表格文字识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns></returns>
public static string FormOcrRequest(string downloadDir, Image img)
{
string url = "https://openapi.youdao.com/ocr_table";
string base64 = WebExt.ImageToBase64(img);
string salt = DateTime.Now.Millisecond.ToString();
string curTime = WebExt.GetTimeSpan();
string sign = ComputeHash(YoudaoKey.AppKey + Truncate(base64) + salt + curTime + YoudaoKey.AppSecret);
string str = string.Format($"q={HttpUtility.UrlEncode(base64)}" +
$"&type=1&appKey={YoudaoKey.AppKey}" +
$"&salt={salt}&sign={sign}&docType=excel&signType=v3&curtime={curTime}");
string result = WebExt.Request(url, null, str);
// 解析json数据
JavaScriptSerializer js = new JavaScriptSerializer();
string json_result = GetDictResult(result);
JsonForm list = js.Deserialize <JsonForm>(json_result);
if (list.tables.Count == 0)
{
throw new Exception("识别失败！");
}
// 将接收到的base64数据写入到xlsx文件
if (downloadDir == null)
{
return(string.Format("识别成功。\r\n返回的Base64编码：\r\n{0}", string.Join("", list.tables.ToArray())));
}
string downloadPath = new SavePath().FormPath + DateTime.Now.ToString("yyyy-MM-dd_HH_mm_ss") + ".xlsx";
if (!Directory.Exists(Path.GetDirectoryName(downloadPath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(downloadPath));
}
using (FileStream fs = new FileStream(downloadPath, FileMode.Create))
{
foreach (var cont in list.tables)
{
byte[] contents = Convert.FromBase64String(cont);
fs.Write(contents, 0, contents.Length);
}
}
return(string.Format("识别成功，已下载到当前程序目录。\r\n返回的Base64编码：\r\n{0}", string.Join("", list.tables.ToArray())));
}
/// <summary>
/// 身份证识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns></returns>
public static string Idcard(Image img)
{
string url = "https://openapi.youdao.com/ocr_structure";
string base64 = WebExt.ImageToBase64(img);
string salt = DateTime.Now.Millisecond.ToString();
string curTime = WebExt.GetTimeSpan();
string sign = ComputeHash(YoudaoKey.AppKey + Truncate(base64) + salt + curTime + YoudaoKey.AppSecret);
string str = string.Format($"q={HttpUtility.UrlEncode(base64)}" +
$"&structureType=idcard&appKey={YoudaoKey.AppKey}" +
$"&salt={salt}&sign={sign}&docType=json&signType=v3&curtime={curTime}");
string result = WebExt.Request(url, null, str);
// 解析json数据
JavaScriptSerializer js = new JavaScriptSerializer();
string json_result = GetDictResult(result);
JsonId list = js.Deserialize <JsonId>(json_result);
return(string.Format($"姓名：{list.Name}\r\n性别：{list.Gender}\r\n" +
$"民族：{list.Nation}\r\n出生：{list.Birthday}\r\n" +
$"住址：{list.Address}\r\n身份证号码：{list.IDNumber}"));
}
