DecodeImage Method

Summary

Decodes the specified PDF image object embedded in this PDFDocument.

Syntax

C++/CLI

Java

Python

public RasterImage DecodeImage( 
   string imageObjectNumber 
)

public RasterImage decodeImage( 
   java.lang.String imageObjectNumber 
);

public: 
RasterImage^ DecodeImage(  
   String^ imageObjectNumber 
)

def DecodeImage(self,imageObjectNumber):

Parameters

imageObjectNumber
String that specifies the PDF image object number to decode.

Return Value

A Leadtools.RasterImage object.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Controls; 
using Leadtools.Pdf; 
using Leadtools.Svg; 
using Leadtools.WinForms; 
 
 
public void PDFDocumentDecodeImageExample() 
{ 
   string sourceFileName = Path.Combine(LEAD_VARS.ImagesDir, @"Leadtools.pdf"); 
   string destinationFileName = Path.Combine(LEAD_VARS.ImagesDir, @"LEAD_pdfDecodeImage.tif"); 
 
   using (PDFDocument document = new PDFDocument(sourceFileName)) 
   { 
      document.Resolution = 200; 
 
      // Parse the objects in all pages 
      document.ParsePages(PDFParsePagesOptions.Objects, 1, -1); 
 
      RasterCodecs codecs = new RasterCodecs(); 
      foreach (PDFDocumentPage page in document.Pages) 
         if (page.Objects != null && page.Objects.Count > 0) 
            foreach (PDFObject obj in page.Objects) 
               if (obj.ObjectType == PDFObjectType.Image) 
                  using (RasterImage image = document.DecodeImage(obj.ImageObjectNumber)) 
                     codecs.Save(image, destinationFileName, RasterImageFormat.TifLzw, image.BitsPerPixel, 1, 1, -1, CodecsSavePageMode.Append); 
 
      codecs.Dispose(); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

PDFDocument Class

PDFDocument Members

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Help Version 22.0.2023.7.10

Leadtools.Pdf Assembly

Introduction

Getting Started

Namespaces

Leadtools.Pdf Namespace

Assemblies