public List <int> DetectRotate(string imagePath)
{
List <int> result = new List <int>();
FREngine.PrepareImageMode pim = engine.CreatePrepareImageMode();
FREngine.DocumentProcessingParams dpp = engine.CreateDocumentProcessingParams();
FREngine.PageProcessingParams ppp = dpp.PageProcessingParams;
var rotation = detectOrientation(imagePath, pim, ppp);
foreach (var item in rotation)
{
int rotate = 0;
switch (item)
{
case FREngine.RotationTypeEnum.RT_Clockwise: rotate = 90; break;
case FREngine.RotationTypeEnum.RT_Upsidedown: rotate = 180; break;
case FREngine.RotationTypeEnum.RT_Counterclockwise: rotate = 270; break;
default: break;
}
result.Add(rotate);
}
return(result);
}
public RecognitionStatistics Process(string imagePath, ProcessingSettings settings)
{
DateTime startTime = System.DateTime.Now;
setStep("Applying profile...");
engine.LoadPredefinedProfile("DocumentConversion_Accuracy");
setStep("Applying settings...");
FREngine.PrepareImageMode pim = engine.CreatePrepareImageMode();
FREngine.DocumentProcessingParams dpp = engine.CreateDocumentProcessingParams();
FREngine.PageProcessingParams ppp = dpp.PageProcessingParams;
ppp.RecognizerParams.SetPredefinedTextLanguage(settings.Language);
disableAllModifications(pim, ppp);
pim.AutoOverwriteResolution = false;
if (settings.CorrectResolution)
{
if (settings.NewResolution == 0)
{
pim.AutoOverwriteResolution = true;
}
else if (settings.NewResolution > 0)
{
pim.OverwriteResolution = true;
pim.XResolutionToOverwrite = settings.NewResolution;
pim.YResolutionToOverwrite = settings.NewResolution;
}
}
if (settings.ConvertToBW)
{
pim.DiscardColorImage = true;
}
if (settings.DeskewImage)
{
pim.CorrectSkew = true;
}
// Detect orientation for all pages
setStep("Detecting orientation...");
FREngine.RotationTypeEnum[] rotation = null;
if (settings.CorrectOrientationMode == ProcessingSettings.OrientationCorrectionMode.Automatic)
{
rotation = detectOrientation(imagePath, pim, ppp);
}
setStep("Loading image...");
// Create document
FREngine.FRDocument frDocument = engine.CreateFRDocument();
RecognitionStatistics recognitionStats = new RecognitionStatistics();
try
{
// Add image file to document
frDocument.AddImageFile(imagePath, pim, null);
if (frDocument.Pages.Count == 0)
{
throw new Exception("No pages in a file");
}
setStep("Performing image modification...");
for (int pageIndex = 0; pageIndex < frDocument.Pages.Count; pageIndex++)
{
FREngine.IFRPage frPage = frDocument.Pages[pageIndex];
FREngine.RotationTypeEnum pageRotation = FREngine.RotationTypeEnum.RT_UnknownRotation;
if (rotation != null && pageIndex < rotation.Length)
{
pageRotation = rotation[pageIndex];
}
applyGeometricalTransformations(frPage, ppp, settings, pageRotation);
GC.Collect();
GC.WaitForPendingFinalizers();
frPage.Flush(true);
}
int[] sourcePageIndices = splitImage(frDocument, ppp, settings);
for (int pageIndex = 0; pageIndex < frDocument.Pages.Count; pageIndex++)
{
FREngine.IFRPage frPage = frDocument.Pages[pageIndex];
applyImageTransformations(frPage, settings);
GC.Collect();
GC.WaitForPendingFinalizers();
frPage.Flush(true);
}
if (settings.IsRecognize)
{
setStep("Recognizing image...");
frDocument.Process(dpp);
}
setStep("Applying visual enhancements...");
for (int pageIndex = 0; pageIndex < frDocument.Pages.Count; pageIndex++)
{
FREngine.IFRPage frPage = frDocument.Pages[pageIndex];
applyVisualEnhancements(frPage, settings);
GC.Collect();
GC.WaitForPendingFinalizers();
frPage.Flush(true);
}
TimeSpan processingTime = DateTime.Now - startTime;
setStep("Computing statistics...");
recognitionStats = computeStatistics(frDocument);
recognitionStats.TotalProcessingTime = processingTime;
recognitionStats.SourcePageIndices = sourcePageIndices;
setStep("Retrieving images...");
for (int pageIndex = 0; pageIndex < frDocument.Pages.Count; pageIndex++)
{
if (recognitionStats.PreprocessedImages == null)
{
recognitionStats.PreprocessedImages = new System.Drawing.Image[frDocument.Pages.Count];
}
FREngine.IFRPage frPage = frDocument.Pages[pageIndex];
recognitionStats.PreprocessedImages[pageIndex] = getImageFromPage(frPage);
GC.Collect();
GC.WaitForPendingFinalizers();
frPage.Flush(false);
}
//frDocument.Export(AppDomain.CurrentDomain.BaseDirectory + "FileSample2.xml", FREngine.FileExportFormatEnum.FEF_XML, null);
//frDocument.Export(AppDomain.CurrentDomain.BaseDirectory + "FileSample2.txt", FREngine.FileExportFormatEnum.FEF_TextUnicodeDefaults, null);
}
finally
{
frDocument.Close();
}
return(recognitionStats);
}