/// <summary>
 /// recognize image request (async)
 /// </summary>
 /// <param name="bmp">Bitmap image</param>
 /// <returns>JSON result</returns>
 public static async Task <string> ycRecognizeImageASYNC(Bitmap bmp) //async operation
 {
     return(await JYCR.PostImage(bmp));
 }
 /// <summary>
 /// recognize image request (async)
 /// </summary>
 /// <param name="fileName">image file name</param>
 /// <returns>JSON result</returns>
 public static async Task <string> ycRecognizeImageASYNC(string fileName) //async operation
 {
     return(await JYCR.PostImage(fileName));
 }