public string OCRProcess(Bitmap img)
{
if (img == null || langCode == null || langCode == "")
{
errorInfo = "Param Missing";
return(null);
}
Bitmap processedImg = ImageProcFunc.Auto_Thresholding(img, imgFunc, imgFuncP1, imgFuncP2);
string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic?access_token=" + accessToken;
Encoding encoding = Encoding.Default;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
request.Method = "post";
request.KeepAlive = true;
// 图片的base64编码
string base64 = ImageProcFunc.GetFileBase64(processedImg);
String str = "language_type=" + langCode + "&image=" + HttpUtility.UrlEncode(base64);
byte[] buffer = encoding.GetBytes(str);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
string result = reader.ReadToEnd();
string ret = "";
BaiduOCRresOutInfo oinfo = JsonConvert.DeserializeObject <BaiduOCRresOutInfo>(result);
if (oinfo.words_result != null)
{
for (int i = 0; i < oinfo.words_result_num; i++)
{
ret = ret + oinfo.words_result[i].words + "\n";
}
return(ret);
}
else
{
errorInfo = "UnknownError";
return(null);
}
}