/// <summary>
/// 表格文字识别
/// </summary>
/// <param name="path">图片路径</param>
/// <param name="img"></param>
/// <returns></returns>
public static string FormOcrRequest(string downloadDir, Image img)
{
string host = "https://aip.baidubce.com/rest/2.0/solution/v1/form_ocr/request?access_token=";
string base64 = WebExt.ImageToBase64(img);
string str = "image=" + HttpUtility.UrlEncode(base64) + "&is_sync=true&request_type=excel";
string json = WebExt.Request(host, GetAccessToken(), str);
// 接收序列化后的数据
string result = FormOcrParseJson(json, out string url);
if (downloadDir == null)
{
return(result);
}
string downloadPath = downloadDir + DateTime.Now.ToString("yyyy-MM-dd_HH_mm_ss") + ".xls";
if (!Directory.Exists(Path.GetDirectoryName(downloadPath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(downloadPath));
}
try
{
WebExt.DownloadFile(url, downloadPath);
result += "\r\n是否下载：下载表格成功。\r\n保存路径：" + downloadPath;
}
catch (Exception ex)
{
result += "\r\n是否下载：下载表格失败！\r\n" + "原因：" + ex.Message;
}
return(result);
}
/// <summary>
/// 百度翻译
/// </summary>
/// <param name="srcText">源文本</param>
/// <param name="from">源语言</param>
/// <param name="to">目标语言</param>
public static string Translate(string srcText, string from, string to, string appid = null, string password = null)
{
string salt = DateTime.Now.Millisecond.ToString();
string id = appid ?? BaiduKey.AppId;
string psd = password ?? BaiduKey.Password;
// 签名
string sign = GetTranslateMD5(id + srcText + salt + psd);
string url = "https://fanyi-api.baidu.com/api/trans/vip/translate";
string str = string.Format($"q={HttpUtility.UrlEncode(srcText)}&from={GetTranLang(from)}&to={GetTranLang(to)}" +
$"&appid={id}&salt={salt}&sign={sign}");
string result = WebExt.Request(url, null, str);
JavaScriptSerializer js = new JavaScriptSerializer(); // 实例化一个能够序列化数据的类
BaiduTranslate list = js.Deserialize <BaiduTranslate>(result); // 将json数据转化为对象类型并赋值给list
if (list.Error_code != null) // 如果调用Api出现错误
{
throw new Exception("调用百度翻译失败" + "\n原因：" + list.Error_msg);
}
// 接收序列化后的数据
StringBuilder dst = new StringBuilder();
foreach (var item in list.Trans_result)
{
dst.Append(item.Dst + "\r\n");
}
return(dst.ToString().TrimEnd('\r', '\n'));
}
public static void ErrorCorrection(string text, out string srcText, out string correctQuery)
{
string host = "https://aip.baidubce.com/rpc/2.0/nlp/v1/ecnet?charset=UTF-8&&access_token=" + GetAccessToken(BaiduKey.CorrectionAK, BaiduKey.CorrectionSK);
string str = "{\"text\":\"" + text + "\"}";
string result = WebExt.Request(host, null, str, "application/json");
CorrectionParseJSON(result, out srcText, out correctQuery);
}
public static string Idcard(Image img)
{
string url = "https://aiapi.jd.com/jdai/ocr_idcard";
byte[] bArr = WebExt.ImageToBytes(img);
string result = Post(url, bArr);
return(IdcardParseJSON(result));
}
public static string GeneralBasic(Image img, string appkey = null, string secretkey = null)
{
string url = "https://aiapi.jd.com/jdai/ocr_universal";
byte[] bArr = WebExt.ImageToBytes(img);
string result = Post(url: url, buffer: bArr, contentType: null, headers: null, appkey: appkey, secretkey: secretkey);
return(GeneralParseJSON(result));
}
/// <summary>
/// 公式识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns></returns>
public static string Formula(Image img)
{
string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/formula?access_token=";
string base64 = WebExt.ImageToBase64(img);
string str = "image=" + HttpUtility.UrlEncode(base64) + "&detect_direction=true";
string result = WebExt.Request(host, GetAccessToken(), str);
return(GeneralParseJSON(result));
}
/// <summary>
/// 银行卡识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns></returns>
public static string BankCard(Image img)
{
string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard?access_token=";
string base64 = WebExt.ImageToBase64(img);
string str = "image=" + HttpUtility.UrlEncode(base64) + "&detect_direction=true";
string result = WebExt.Request(host, GetAccessToken(), str);
result = BankCardParseJson(result);
return(result);
}
/// <summary>
/// 身份证识别
/// </summary>
/// <param name="cardSide">"front"含照片面，"back"含国徽面</param>
/// <param name="path">图片路径</param>
/// <param name="img"></param>
/// <returns></returns>
public static string Idcard(string cardSide, Image img)
{
string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token=";
string base64 = WebExt.ImageToBase64(img);
string str = "id_card_side=" + cardSide + "&detect_direction=true&detect_risk=true&detect_photo=true&image=" + HttpUtility.UrlEncode(base64);
string result = WebExt.Request(host, GetAccessToken(), str);
if (cardSide.ToLower() == "back") // 含国徽面
{
result = IdcardBackParseJson(result);
}
else // 含照片面
{
result = IdcardFrontParseJson(result);
}
return(result);
}
/// <summary>
/// 获取AccessToken，失败时抛出异常
/// </summary>
/// <returns></returns>
public static string GetAccessToken(string apikey = null, string secretkey = null)
{
string host = "https://aip.baidubce.com/oauth/2.0/token";
string ak = apikey ?? BaiduKey.ApiKey;
string sk = secretkey ?? BaiduKey.SecretKey;
string str = string.Format($"grant_type=client_credentials&client_id={ak}&client_secret={sk}");
string result = WebExt.Request(host, "", str);
JavaScriptSerializer js = new JavaScriptSerializer(); // 实例化一个能够序列化数据的类
Token list = js.Deserialize <Token>(result); // 将json数据转化为对象并赋值给list
if (list.error != null)
{
throw new Exception("获取AccessToken失败！" + "\n原因：" + list.error_description);
}
return(list.access_token);
}
/// <summary>
/// 二维码识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns></returns>
public static string QRCode(Image img)
{
string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/qrcode?access_token=";
string base64 = WebExt.ImageToBase64(img);
string str = "image=" + HttpUtility.UrlEncode(base64);
string result = WebExt.Request(host, GetAccessToken(), str);
// 解析json数据
JavaScriptSerializer js = new JavaScriptSerializer();
BaiduOcrJson list = js.Deserialize <BaiduOcrJson>(result);
if (list.error_code != null) // 如果调用Api出现错误
{
throw new Exception("OCR识别错误！" + "\n原因：" + list.error_msg);
}
if (list.codes_result.Count == 0)
{
return("未检测到二维码");
}
// 接收序列化后的数据
StringBuilder builder = new StringBuilder();
foreach (var item in list.codes_result)
{
builder.Append("二维码类型：" + item.type + "\r\n");
builder.Append("二维码内容：");
foreach (var text in (IEnumerable <object>)item.text)
{
builder.Append(text + "\r\n");
}
}
// 查找最后一个换行符的位置
int len = builder.ToString().LastIndexOf('\r');
return(len < 0 ? "" : builder.ToString().Remove(len));
}
/// <summary>
/// 百度文字识别（通用、通用（高精度）、手写、数字）
/// </summary>
/// <param name="mode">模式（通用、通用（高精度）、手写、数字）</param>
/// <param name="path">图片路径</param>
/// <param name="img">image</param>
/// <param name="langType">识别语言</param>
/// <returns></returns>
public static string GeneralBasic(string mode, Image img, string langType = null)
{
string general_basic_host = "https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic?access_token=";
string accurate_basic_host = "https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic?access_token=";
string handwriting_host = "https://aip.baidubce.com/rest/2.0/ocr/v1/handwriting?access_token=";
string numbers_host = "https://aip.baidubce.com/rest/2.0/ocr/v1/numbers?access_token=";
// 进行base64编码
string base64 = WebExt.ImageToBase64(img);
string host = null, str = null;
if (mode.IndexOf("通用") != -1)
{
host = general_basic_host;
str = "image=" + HttpUtility.UrlEncode(base64, Encoding.UTF8) + "&language_type=" + GetLangType(langType) + "&detect_direction=true";
}
else if (mode.IndexOf("高精度") != -1)
{
host = accurate_basic_host;
str = "image=" + HttpUtility.UrlEncode(base64, Encoding.UTF8) + "&language_type=" + GetLangType(langType) + "&detect_direction=true";
}
else if (mode.IndexOf("手写") != -1)
{
host = handwriting_host;
str = "image=" + HttpUtility.UrlEncode(base64, Encoding.UTF8);
}
else if (mode.IndexOf("数字") != -1)
{
host = numbers_host;
str = "image=" + HttpUtility.UrlEncode(base64, Encoding.UTF8) + "&detect_direction=true";
}
// 发送请求，接收数据
string result = WebExt.Request(host, GetAccessToken(), str);
return(GeneralParseJSON(result));
}
private static string GetSign(string sk, string ts) => WebExt.GetMD5(sk + ts);
private static string GetSign(string sk, string ts)
{
return(WebExt.GetMD5(sk + ts));
}
