/// <summary>
/// Calls Generate template function and processes result
/// </summary>
/// <param name="descriptionFileName">Name of the description file</param>
/// <param name="descriptionData">Template description data in bytes</param>
/// <param name="imagesPath">Cloud storage folder where images are located</param>
/// <param name="additionalParams">Internal parameters</param>
/// <returns>Generated content with template and image</returns>
public static TemplateGenerationContent GenerateTemplate(string descriptionFileName, byte[] descriptionData, string imagesPath, string additionalParams)
{
imagesPath = @"{ ""ExtraStoragePath"":""" + imagesPath + @"""}";
OmrResponse response = RunOmrTask(OmrFunctions.GenerateTemplate, descriptionFileName, descriptionData,
imagesPath, false, false, additionalParams);
OmrResponseContent responseResult = response.Payload.Result;
CheckTaskResult(response.Payload.Result);
byte[] template = responseResult.ResponseFiles.First(x => x.Name.Contains(".omr")).Data;
byte[] imageFile = responseResult.ResponseFiles.First(x => x.Name.Contains(".png")).Data;
TemplateViewModel templateViewModel = TemplateSerializer.JsonToTemplate(Encoding.UTF8.GetString(template));
templateViewModel.ImageFileFormat = ".png";
TemplateGenerationContent generationContent = new TemplateGenerationContent();
generationContent.ImageData = imageFile;
generationContent.Template = templateViewModel;
return(generationContent);
}
/// <summary>
/// Performs OMR over single image
/// </summary>
/// <param name="imageName">Recognized image name</param>
/// <param name="imageData">The image data</param>
/// <param name="templateId">The template id</param>
/// <param name="wasUploaded">Indicates if image was already uploaded on cloud</param>
/// <param name="additionalParams">The additional parameters</param>
/// <returns>Recognition results</returns>
public static ImageRecognitionResult RecognizeImage(string imageName, byte[] imageData, string templateId, bool wasUploaded, string additionalParams)
{
OmrResponse response = RunOmrTask(OmrFunctions.RecognizeImage, imageName, imageData, templateId, wasUploaded, true, additionalParams);
OmrResponseContent responseResult = response.Payload.Result;
if (responseResult.Info.SuccessfulTasksCount < 1 || responseResult.Info.Details.RecognitionStatistics[0].TaskResult != "Pass")
{
StringBuilder builder = new StringBuilder();
builder.AppendLine("Error recognizing image " + "\"" + imageName + "\".");
foreach (string message in responseResult.Info.Details.RecognitionStatistics[0].TaskMessages)
{
builder.AppendLine(message);
}
throw new Exception(builder.ToString());
}
ImageRecognitionResult recognitionResult = new ImageRecognitionResult();
foreach (Omr.Cloud.Sdk.Model.FileInfo file in responseResult.ResponseFiles)
{
if (file.Name.Contains(".dat"))
{
byte[] answersBytes = responseResult.ResponseFiles.First(x => x.Name.Contains(".dat")).Data;
recognitionResult.RecognizedAnswers = Encoding.UTF8.GetString(answersBytes);
}
else if (file.Name.Contains(".jpg"))
{
recognitionResult.ClippedAreas.Add(new KeyValuePair <string, byte[]>(file.Name, file.Data));
}
}
return(recognitionResult);
}
/// <summary>
/// Check response for error
/// </summary>
/// <param name="response">Response to check</param>
private static void CheckForError(OmrResponse response)
{
if (response.ErrorCode != 0)
{
throw new Exception(response.ErrorText);
}
}
/// <summary>
/// Helper function that combines template correction and finalization
/// </summary>
/// <param name="templateImagePath">Path to template image</param>
/// <param name="templateDataDir">The folder where Template Data will be stored</param>
/// <returns>Template ID</returns>
protected string ValidateTemplate(string templateImagePath, string templateDataDir)
{
OmrResponse correctReponse = this.CorrectTemplate(templateImagePath, templateDataDir);
// save correction results and provide them to the template finalization
string correctedTemplatePath = string.Empty;
if (correctReponse.ErrorCode == 0)
{
foreach (var responseFile in correctReponse.Payload.Result.ResponseFiles)
{
Utility.DeserializeFile(responseFile, this.PathToOutput);
if (responseFile.Name.ToLower().EndsWith(".omrcr"))
{
correctedTemplatePath = Utility.DeserializeFile(responseFile, this.PathToOutput);
}
}
}
else
{
throw new Exception($"Correct Template failed with error code {correctReponse.ErrorCode}, '{correctReponse.ErrorText}'");
}
string templateId = correctReponse.Payload.Result.TemplateId;
OmrResponse finalizeReponse = this.FinalizeTemplate(templateId, correctedTemplatePath);
return(templateId);
}
/// <summary>
/// Runs all omr functions using sample data
/// </summary>
public void RunDemo()
{
// Step 1: Upload demo files on cloud and Generate template
Console.WriteLine("\t\tUploading demo files...");
this.UploadDemoFiles(this.DataFolder);
Console.WriteLine("\t\tGenerate template...");
OmrResponse generateReponse = this.GenerateTemplate(Path.Combine(this.DataFolder, this.TemplateGenerationFileName), this.LogosFolderName);
if (generateReponse.ErrorCode == 0)
{
Utility.DeserializeFiles(generateReponse.Payload.Result.ResponseFiles, this.PathToOutput);
}
// Step 2: Validate template
Console.WriteLine("\t\tValidate template...");
string templateId = this.ValidateTemplate(Path.Combine(this.PathToOutput, this.TemplateImageName), this.PathToOutput);
// Step 3: Recognize photos and scans
Console.WriteLine("\t\tRecognize image...");
foreach (var userImage in this.templateUserImagesNames)
{
var recognizeReponse = this.RecognizeImage(templateId, Path.Combine(this.DataFolder, userImage));
if (recognizeReponse.ErrorCode == 0)
{
var resultFile = Utility.DeserializeFiles(recognizeReponse.Payload.Result.ResponseFiles, this.PathToOutput)[0];
Console.WriteLine($"Result file {resultFile}");
}
}
}
/// <summary>
/// Performs template finalization
/// </summary>
/// <param name="templateName">The template file name</param>
/// <param name="templateData">The template data</param>
/// <param name="templateId">The template id</param>
/// <param name="additionalParams">The additional parameters</param>
/// <returns>Finalization data containing warnings</returns>
public static FinalizationData FinalizeTemplate(string templateName, byte[] templateData, string templateId, string additionalParams)
{
OmrResponse response = RunOmrTask(OmrFunctions.FinalizeTemplate, templateName, templateData, templateId, false, false, additionalParams);
OmrResponseContent responseResult = response.Payload.Result;
CheckTaskResult(response.Payload.Result);
FinalizationData data = new FinalizationData();
data.Answers = Encoding.UTF8.GetString(responseResult.ResponseFiles[0].Data);
data.Warnings = responseResult.Info.Details.TaskMessages.ToArray();
return(data);
}
/// <summary>
/// Performs template correction
/// </summary>
/// <param name="imageName">The name of the template image</param>
/// <param name="imageData">The template image data</param>
/// <param name="templateData">The template data</param>
/// <param name="wasUploaded">Indicates if image was already uploaded on cloud</param>
/// <param name="additionalParams">The additional parameters</param>
/// <returns>Corrected template</returns>
public static TemplateViewModel CorrectTemplate(string imageName, byte[] imageData, string templateData, bool wasUploaded, string additionalParams)
{
string packedTemplate = PackTemplate(imageName, templateData);
OmrResponse response = RunOmrTask(OmrFunctions.CorrectTemplate, imageName, imageData, packedTemplate,
wasUploaded, false, additionalParams);
OmrResponseContent responseResult = response.Payload.Result;
CheckTaskResult(response.Payload.Result);
byte[] correctedTemplateData = responseResult.ResponseFiles
.First(x => x.Name.Contains(".omrcr"))
.Data;
TemplateViewModel templateViewModel = TemplateSerializer.JsonToTemplate(Encoding.UTF8.GetString(correctedTemplateData));
templateViewModel.TemplateId = responseResult.TemplateId;
return(templateViewModel);
}
/// <summary>
/// Put files to the cloud and call OMR task
/// </summary>
/// <param name="action">The executed OMR function</param>
/// <param name="fileName">The file name</param>
/// <param name="fileData">The file data</param>
/// <param name="functionParam">The function parameters</param>
/// <param name="wasUploaded">Indicates if image was already uploaded on cloud</param>
/// <param name="trackFile">Track file so that it can be deleted from cloud</param>
/// <param name="additionalParam">The additional (debug) parameters</param>
/// <returns>Task response</returns>
public static OmrResponse RunOmrTask(OmrFunctions action, string fileName, byte[] fileData, string functionParam, bool wasUploaded, bool trackFile, string additionalParam)
{
if (string.IsNullOrEmpty(AppKey) || string.IsNullOrEmpty(AppSid))
{
throw new Exception("Please specify App Key and App SID in Settings->Credentials in order to use OMR functions.");
}
if (!wasUploaded)
{
BusyIndicatorManager.UpdateText("Uploading files...");
if (trackFile)
{
CloudStorageManager.TrackFileUpload(fileName);
}
try
{
string baseHost = new Uri(Basepath).GetComponents(UriComponents.SchemeAndServer, UriFormat.SafeUnescaped).ToString();
Configuration storageConfiguration = new Configuration();
storageConfiguration.AppKey = AppKey;
storageConfiguration.AppSid = AppSid;
storageConfiguration.ApiBaseUrl = baseHost;
StorageApi storageApi = new StorageApi(storageConfiguration);
using (Stream stream = new MemoryStream(fileData))
{
storageApi.PutCreate(new PutCreateRequest(fileName, stream));
}
}
catch (ApiException e)
{
if (e.ErrorCode == 401)
{
// handle authentification exception
throw new Exception("Aspose Cloud Authentification Failed! Please check App Key and App SID in Settings->Credentials.");
}
throw;
}
}
OmrApi omrApi = new OmrApi(AppKey, AppSid);
OmrFunctionParam param = new OmrFunctionParam();
param.FunctionParam = functionParam;
param.AdditionalParam = additionalParam;
string busyMessage = "";
switch (action)
{
case OmrFunctions.CorrectTemplate:
busyMessage = "Performing Template Correction...";
break;
case OmrFunctions.FinalizeTemplate:
busyMessage = "Performing Template Finalization...";
break;
case OmrFunctions.RecognizeImage:
busyMessage = "Performing Recognition...";
break;
case OmrFunctions.GenerateTemplate:
busyMessage = "Generating Template...";
break;
}
BusyIndicatorManager.UpdateText(busyMessage);
var request = new PostRunOmrTaskRequest(fileName, action.ToString(), param);
OmrResponse response = omrApi.PostRunOmrTask(request);
CheckForError(response);
return(response);
}
