/// <summary>
/// 获取Access Token
/// </summary>
/// <returns></returns>
public static string?GetAccessToken(this BaiduSetting setting)
{
string url = $"https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id={setting.client_id}&client_secret={setting.client_secret}";
string result = NetAgent.UploadData(url, string.Empty, Encoding.UTF8);
JObject info = JObject.Parse(result);
return(info["access_token"]?.Value <string>());
}
/// <summary>
/// 通用文字识别（标准含位置版）
/// 0.01/次 10QPS
/// </summary>
/// <returns></returns>
public static List <OCRGeneralResult>?general(this BaiduSetting setting, Bitmap bitmap)
{
string? access_token = setting.GetAccessToken();
string url = $"https://aip.baidubce.com/rest/2.0/ocr/v1/general?access_token={access_token}";
string image = System.Web.HttpUtility.UrlEncode(bitmap.ToBase64());
string result = NetAgent.UploadData(url, $"image={image}", Encoding.UTF8);
JObject info = JObject.Parse(result);
List <OCRGeneralResult> list = new();
foreach (JObject item in info["words_result"]?.Value <JArray>() ?? new JArray())
{
list.Add(new OCRGeneralResult(item));
}
return(list);
}