/// <summary>
/// 百度文字识别-解析返回的json数据
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
private static string GeneralParseJSON(string json)
{
// 解析json数据
JavaScriptSerializer js = new JavaScriptSerializer();
BaiduOcrJson list = js.Deserialize <BaiduOcrJson>(json);
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.words_result.Count == 0)
{
return("未检测到文字");
}
// 接收序列化后的数据
StringBuilder builder = new StringBuilder();
foreach (var item in list.words_result)
{
builder.Append(item.words + "\r\n");
}
// 查找最后一个换行符的位置
return(builder.ToString().TrimEnd(new char[] { '\r', '\n' }));
}
// 调用百度API文字识别
private static string GeneralBasic(string from, Image img)
{
if (from == "ru")
{
from = "RUS";
}
else
{
from = "CHN_ENG";
}
// 获取文字识别AccessToken
string token = GetAccessToken();
Encoding encoding = Encoding.Default;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(accurate_basic_host + token);
request.Method = "post";
request.KeepAlive = true;
string base64 = ImageToBase64(img);
string str = "image=" + HttpUtility.UrlEncode(base64) + "&language_type=" + from;
byte[] buffer = encoding.GetBytes(str);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string result;
using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
{
result = reader.ReadToEnd();
}
JavaScriptSerializer js = new JavaScriptSerializer(); // 实例化一个能够序列化数据的类
BaiduOcrJson list = js.Deserialize <BaiduOcrJson>(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("OCR识别错误！" + "\n原因：" + list.error_msg);
}
// 接收序列化后的数据
StringBuilder builder = new StringBuilder();
foreach (var item in list.words_result)
{
builder.Append(item.words + "\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>
/// 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));
}
