В этом примере показано, как извлечь только текст из отсканированного PDF-файла.
Предположим, у нас есть заполненный договор аренды автомобиля в Scanned.pdf Существует также скрытый текст, который дублирует содержимое изображения.
Задача состоит в том, чтобы создать соответствующий документ Word, сделав текст видимым и удалив все изображения.
Загрузите полученный файл: Result-Scanned PDF для Word.docx
Полный код
using SautinSoft.Document;
namespace Example
{
class Program
{
static void Main(string[] args)
{
// Get your free 100-day key here:
// https://sautinsoft.com/start-for-free/
ScannedPdfToWord();
}
/// <summary>
/// The method converts a PDF document with scanned images to Word. But it works only if the PDF document contains a hidden text atop of the images.
/// </summary>
/// <remarks>
/// Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/from-customers-scanned-pdf-to-word-in-csharp-vb-net.php
/// </remarks>
static void ScannedPdfToWord()
{
// Actually there are a lot of PDF documents which looks like created using a scanner,
// but they also contain a hidden text atop of the contents.
// This hidden text duplicates the content of the scanned images.
// This is made specially to have the ability to perform the 'find' operation.
// Our steps:
// 1. Load the PDF with the these settings:
// - show hidden text;
// - skip all images during the loading.
// 2. Change the font color to the 'Black' for the all text.
// 3. Save the document as DOCX.
string inpFile = @"..\..\..\Scanned.pdf";
string outFile = @"Result.docx";
PdfLoadOptions pdfLO = new PdfLoadOptions()
{
// 'Disabled' - Never load embedded fonts in PDF. Use the fonts with the same name installed at the system or similar by font metrics.
// 'Enabled' - Always load embedded fonts in PDF.
// 'Auto' - Load only embedded fonts missing in the system. In other case, use the system fonts.
PreserveEmbeddedFonts = PropertyState.Enabled,
PreserveImages = false,
ShowInvisibleText = true,
};
DocumentCore dc = DocumentCore.Load(inpFile, pdfLO);
dc.DefaultCharacterFormat.FontColor = Color.Black;
foreach (Element element in dc.GetChildElements(true, ElementType.Paragraph))
{
foreach (Inline inline in (element as Paragraph).Inlines)
{
if (inline is Run)
(inline as Run).CharacterFormat.FontColor = Color.Black;
}
(element as Paragraph).CharacterFormatForParagraphMark.FontColor = Color.Black;
}
dc.Save(outFile);
// Open the result for demonstration purposes.
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
}
}
}
Imports SautinSoft.Document
Namespace Example
Friend Class Program
Shared Sub Main(ByVal args() As String)
ScannedPdfToWord()
End Sub
''' Get your free 100-day key here:
''' https://sautinsoft.com/start-for-free/
''' <summary>
''' The method converts a PDF document with scanned images to Word. But it works only if the PDF document contains a hidden text atop of the images.
''' </summary>
''' <remarks>
''' Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/from-customers-scanned-pdf-to-word-in-csharp-vb-net.php
''' </remarks>
Private Shared Sub ScannedPdfToWord()
' Actually there are a lot of PDF documents which looks like created using a scanner,
' but they also contain a hidden text atop of the contents.
' This hidden text duplicates the content of the scanned images.
' This is made specially to have the ability to perform the 'find' operation.
' Our steps:
' 1. Load the PDF with the these settings:
' - show hidden text;
' - skip all images during the loading.
' 2. Change the font color to the 'Black' for the all text.
' 3. Save the document as DOCX.
Dim inpFile As String = "..\..\..\Scanned.pdf"
Dim outFile As String = "Result.docx"
Dim pdfLO As New PdfLoadOptions
With pdfLO
' 'Disabled' - Never load embedded fonts in PDF. Use the fonts with the same name installed at the system or similar by font metrics.
' 'Enabled' - Always load embedded fonts in PDF.
' 'Auto' - Load only embedded fonts missing in the system. In other case, use the system fonts.
.PreserveEmbeddedFonts = PropertyState.Enabled
.PreserveImages = False
.ShowInvisibleText = True
End With
Dim dc As DocumentCore = DocumentCore.Load(inpFile, pdfLO)
dc.DefaultCharacterFormat.FontColor = Color.Black
For Each element As Element In dc.GetChildElements(True, ElementType.Paragraph)
For Each inline As Inline In (TryCast(element, Paragraph)).Inlines
If TypeOf inline Is Run Then
TryCast(inline, Run).CharacterFormat.FontColor = Color.Black
End If
Next inline
TryCast(element, Paragraph).CharacterFormatForParagraphMark.FontColor = Color.Black
Next element
dc.Save(outFile)
' Open the result for demonstration purposes.
System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
End Sub
End Class
End Namespace
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