private List <PageInfo> QueueAndWait(ImageProcessingArgs args)
{
queue.Add(args);
args.SyncEvent.WaitOne();
if (args.ExceptionObject != null)
{
throw new Exception(args.ExceptionObject.Message, args.ExceptionObject);
}
return((args.Operation == ImageProcessingArgs.OperationType.Concat) ? null : args.Pages);
}
private void Repair(ImageEditor repair, ImageProcessingArgs args)
{
// Increment the internal Page Index for the current ImageConversionOptions object
args.Options.PageIndex++;
// Build the filename part based on the PageIndex (will be persisted across calls so long as the same Options are used)
var filePart = String.Format("{0:000}.tif", args.Options.PageIndex);
// Create the Page object
var page = new PageInfo()
{
FileName = Path.Combine(args.Options.SaveToPath, filePart),
RelativePath = Path.Combine(args.Options.RelativePath, filePart),
Width = repair.Image.Width,
Height = repair.Image.Height
};
if (!repair.Image.IsBitonal())
{
// Not already bitonal, so process as necessary
switch (args.Options.BitDepth)
{
case 1:
if (args.Options.BinarisationAlgorithm == BinarisationAlgorithm.Default || args.Options.BinarisationAlgorithm == BinarisationAlgorithm.ClearImage)
{
repair.AdvancedBinarize(args.Options.Resolution);
}
else
{
// Source image must be grayscaled first
repair.ToGrayscale();
// Using an unmanaged image we will operate directly on the source images memory
using (UnmanagedImage image = new UnmanagedImage(repair.Image.Buffer, repair.Width, repair.Height, repair.Image.LineBytes, PixelFormat.Format8bppIndexed))
{
IInPlaceFilter filter = null;
if (args.Options.BinarisationAlgorithm == BinarisationAlgorithm.OtsuThreshold)
{
filter = new OtsuThreshold();
}
else if (args.Options.BinarisationAlgorithm == BinarisationAlgorithm.FloydSteinbergDither)
{
filter = new FloydSteinbergDithering();
}
else
{
filter = new BradleyLocalThresholding();
}
filter.ApplyInPlace(image);
}
// Image is still in 8 bit format (but is bitonal) so we need to convert to a 1 bit image
repair.ToBitonal();
}
break;
case 8:
repair.ToGrayscale();
break;
}
// Set the Resolution
repair.Image.HorzDpi = args.Options.Resolution;
repair.Image.VertDpi = args.Options.Resolution;
}
else
{
// Is already bitonal, so quite possibly a fax
repair.FaxStandardToFine();
// Remove the Fax Header if exists
if (args.Options.RemoveFaxHeader)
{
repair.FaxRemoveHeader();
}
}
// Perform Auto Deskew
if (args.Options.AutoDeskew.GetValueOrDefault())
{
page.Skew = repair.AutoDeskew();
}
// Perform Auto Rotate
if (args.Options.AutoRotate.GetValueOrDefault())
{
page.Rotation = repair.AutoRotate();
}
// Check if the image is blank and store with the Page object
page.IsBlank = repair.IsBlankImage();
// Setup the image save options
if (repair.Image.IsBitonal())
{
repair.Image.pComprBitonal = EComprBitonal.citbCCITTFAX4;
}
else
{
repair.Image.pComprColor = EComprColor.citcJPEG;
repair.Image.JpegQuality = 85;
}
// Save the image
repair.Image.SaveAs(page.FileName, EFileFormat.ciEXT);
// Add the page to the collection
args.Pages.Add(page);
}
private void Process(ImageEditor repair, ImageProcessingArgs args)
{
int page = 0;
switch (args.Operation)
{
case ImageProcessingArgs.OperationType.File:
int total = 0;
do
{
// Open the next page
repair.Image.Open((String)args.ImageData, ++page);
// Get the total page count (just incase PageCount gets reset on close in future versions)
if (total == 0)
{
total = repair.Image.PageCount;
}
// Process the current page
Repair(repair, args);
// Close the image
repair.Image.Close();
} while (page < total);
break;
case ImageProcessingArgs.OperationType.Stream:
do
{
// Open the image from the stream (or next page)
if (page == 0)
{
repair.Image.Open((Stream)args.ImageData, ++page);
}
else
{
repair.Image.OpenPage(++page);
}
// Process the current page
Repair(repair, args);
} while (page < repair.Image.PageCount);
break;
case ImageProcessingArgs.OperationType.Bitmap:
var bitmap = (Bitmap)args.ImageData;
for (int i = 0; i < bitmap.GetFrameCount(FrameDimension.Page); i++)
{
// Select the page
bitmap.SelectActiveFrame(FrameDimension.Page, i);
// Open the pages
repair.Image.Open(bitmap);
// Process and current page
Repair(repair, args);
}
break;
case ImageProcessingArgs.OperationType.Concat:
var file = (String)args.ImageData;
foreach (var pg in args.Pages)
{
repair.Image.Open(pg.FileName, 1);
if (repair.Image.IsBitonal())
{
repair.Image.pComprBitonal = EComprBitonal.citbCCITTFAX4;
}
else
{
repair.Image.pComprColor = EComprColor.citcJPEG;
repair.Image.JpegQuality = 85;
}
repair.Image.Append(file, EFileFormat.ciEXT);
}
break;
}
}
