static void Slice(int pageIndex, FoundLinesCollection lines, RasterRenderer rasterRenderer)
{
const float pdfRenderingResolution = 300;
float lastLineY = float.NaN;
int sliceNum = 0;
RectangleF pageRect = rasterRenderer.GetPageRectangle(pageIndex);
foreach (FoundLine line in lines)
{
if (float.IsNaN(lastLineY))
{
lastLineY = line.From.Y;
}
else
{
// Compute slice rectangle
RectangleF sliceRect = new RectangleF(0, lastLineY, pageRect.Width, line.From.Y - lastLineY);
// Set extraction rectangle for RasterRenderer
rasterRenderer.SetExtractionArea(sliceRect);
// Render the page region to Image object
Image slice = rasterRenderer.GetImage(pageIndex, pdfRenderingResolution);
// Create PDF document
Document document = new Document
{
RegistrationName = "demo",
RegistrationKey = "demo"
};
// Create page of A4 size
Page page = new Page(PaperFormat.A4);
document.Pages.Add(page);
// Create PDF Image object from System.Drawing.Image
Bytescout.PDF.Image pdfImage = new Bytescout.PDF.Image(slice);
// Draw image on the page keeping the aspect ratio
RectangleF r = new RectangleF(0, 20, page.Width, page.Width / slice.Width * slice.Height);
page.Canvas.DrawImage(pdfImage, r.Left, r.Top, r.Width, r.Height);
// Save PDF document
string fileName = string.Format(@"{0}\{1}-page{2}-slice{3}.pdf", OutputFolder, Path.GetFileName(InputFile), pageIndex, ++sliceNum);
document.Save(fileName);
Console.WriteLine("Saved slice '{0}'", fileName);
// Cleanup
document.Dispose();
slice.Dispose();
lastLineY = line.From.Y;
}
}
}
static void Main(string[] args)
{
if (!Directory.Exists(OutputFolder))
{
Directory.CreateDirectory(OutputFolder);
}
// Create LineDetector instance and load document
LineDetector lineDetector = new LineDetector("demo", "demo");
lineDetector.LoadDocumentFromFile(InputFile);
// Create RasterRenderer instance and load document
RasterRenderer rasterRenderer = new RasterRenderer("demo", "demo");
rasterRenderer.LoadDocumentFromFile(InputFile);
try
{
int pageCount = lineDetector.GetPageCount();
for (int pageIndex = 0; pageIndex < pageCount; pageIndex++)
{
Console.WriteLine("Processing page #{0}", pageIndex);
// Find horizontal lines on the page
FoundLinesCollection horzLines = lineDetector.FindLines(pageIndex, LineOrientationsToFind.OnlyHorizontal);
// Slice page by separating lines and create new PDF documents
Slice(pageIndex, horzLines, rasterRenderer);
}
}
catch (Exception exception)
{
Console.WriteLine(exception);
}
finally
{
// Cleanup
rasterRenderer.Dispose();
lineDetector.Dispose();
}
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
static void Main(string[] args)
{
// Create Bytescout.PDFExtractor.LineDetector instance
LineDetector lineDetector = new LineDetector();
lineDetector.RegistrationName = "demo";
lineDetector.RegistrationKey = "demo";
// Load sample PDF document
lineDetector.LoadDocumentFromFile(@".\sample2.pdf");
FoundLinesCollection foundLines = lineDetector.FindLines(1, LineOrientationsToFind.HorizontalAndVertical);
Console.WriteLine("Number of lines found: " + foundLines.Count);
for (int i = 0; i < foundLines.Count; i++)
{
FoundLine line = foundLines[i];
Console.WriteLine("Line # " + i);
// Line Orientation
Console.WriteLine("LineOrientation: " + line.LineOrientation);
// Starting point of the line
Console.WriteLine("From point: " + line.From);
// Ending point of the line
Console.WriteLine("To point: " + line.To);
// Line width
Console.WriteLine("Width: " + line.Width);
}
Console.ReadLine();
}
