Convert a PDF file to image

Question

I wanted to convert PDF document into image. I was using Ghost4j.

Problem: Ghost4J needs gsdll32.dll file at runtime, and I do not want to use the dll file.

Question 1: is there any way, in ghost4j to convert image without the dll?

Question 2: I found the solution in PDFBox API. org.apache.pdfbox.pdmodel.PDPagep have methodconvertToImage()` which converts PDF page to Image format.

PDDocument doc = PDDocument.load(new File("/document.pdf")); List<PDPage>pages =  doc.getDocumentCatalog().getAllPages(); PDPage page = pages.get(0); BufferedImage image =page.convertToImage(); File outputfile = new File("/image.png"); ImageIO.write(image, "png", outputfile); doc.close(); 

I have only text on the PDF document. and I have that Exception when I run this code:

Aug 12, 2013 6:00:24 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: BDC Exception in thread "main" java.lang.ExceptionInInitializerError     at org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getawtFont(PDTrueTypeFont.java:481)     at org.apache.pdfbox.pdmodel.font.PDSimpleFont.drawString(PDSimpleFont.java:109)     at org.apache.pdfbox.pdfviewer.PageDrawer.processTextPosition(PageDrawer.java:235)     at org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:496)     at org.apache.pdfbox.util.operator.ShowTextGlyph.process(ShowTextGlyph.java:62)     at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:554)     at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)     at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)     at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)     at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:125)     at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:781)     at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:712)     at ge.eid.esignature.adessa.pades.sign.PDFtoImage.main(PDFtoImage.java:25) Caused by: java.lang.IllegalArgumentException     at java.nio.Buffer.position(Buffer.java:216)     at sun.font.TrueTypeFont.lookupName(TrueTypeFont.java:1153)     at sun.font.TrueTypeFont.getPostscriptName(TrueTypeFont.java:1205)     at java.awt.Font.getPSName(Font.java:1156)     at org.apache.pdfbox.pdmodel.font.FontManager.loadFonts(FontManager.java:101)     at org.apache.pdfbox.pdmodel.font.FontManager.<clinit>(FontManager.java:53)     ... 13 more 

Answer 1

You can easily convert 04-Request-Headers.pdf file pages into image format.

Convert all pdf pages into image format in Java using PDF Box.

Solution for Apache PDFBox 1.8.* version:

Jar required pdfbox-1.8.3.jar

or the maven dependency

<dependency>     <groupId>org.apache.pdfbox</groupId>     <artifactId>pdfbox</artifactId>     <version>1.8.3</version> </dependency> 

Here is the solution:

package com.pdf.pdfbox.examples;  import java.awt.image.BufferedImage; import java.io.File; import java.util.List;  import javax.imageio.ImageIO;  import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage;  @SuppressWarnings("unchecked") public class ConvertPDFPagesToImages {     public static void main(String[] args) {         try {         String sourceDir = "C:/Documents/04-Request-Headers.pdf"; // Pdf files are read from this folder         String destinationDir = "C:/Documents/Converted_PdfFiles_to_Image/"; // converted images from pdf document are saved here          File sourceFile = new File(sourceDir);         File destinationFile = new File(destinationDir);         if (!destinationFile.exists()) {             destinationFile.mkdir();             System.out.println("Folder Created -> "+ destinationFile.getAbsolutePath());         }         if (sourceFile.exists()) {             System.out.println("Images copied to Folder: "+ destinationFile.getName());                          PDDocument document = PDDocument.load(sourceDir);             List<PDPage> list = document.getDocumentCatalog().getAllPages();             System.out.println("Total files to be converted -> "+ list.size());              String fileName = sourceFile.getName().replace(".pdf", "");                          int pageNumber = 1;             for (PDPage page : list) {                 BufferedImage image = page.convertToImage();                 File outputfile = new File(destinationDir + fileName +"_"+ pageNumber +".png");                 System.out.println("Image Created -> "+ outputfile.getName());                 ImageIO.write(image, "png", outputfile);                 pageNumber++;             }             document.close();             System.out.println("Converted Images are saved at -> "+ destinationFile.getAbsolutePath());         } else {             System.err.println(sourceFile.getName() +" File not exists");         }      } catch (Exception e) {         e.printStackTrace();     } } } 

Possible conversions of image into jpg, jpeg, png, bmp, gif format.

Note: I mentioned the mainly used image formats.

ImageIO.write(image , "jpg", new File( destinationDir +fileName+"_"+pageNumber+".jpg" )); ImageIO.write(image , "jpeg", new File( destinationDir +fileName+"_"+pageNumber+".jpeg" )); ImageIO.write(image , "png", new File( destinationDir +fileName+"_"+pageNumber+".png" )); ImageIO.write(image , "bmp", new File( destinationDir +fileName+"_"+pageNumber+".bmp" )); ImageIO.write(image , "gif", new File( destinationDir +fileName+"_"+pageNumber+".gif" )); 

Console Output:

Images copied to Folder: Converted_PdfFiles_to_Image Total files to be converted -> 13 Aug 06, 2014 1:35:49 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_1.png Aug 06, 2014 1:35:50 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_2.png Aug 06, 2014 1:35:51 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_3.png Aug 06, 2014 1:35:51 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_4.png Aug 06, 2014 1:35:52 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_5.png Aug 06, 2014 1:35:52 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_6.png Aug 06, 2014 1:35:53 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_7.png Aug 06, 2014 1:35:53 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_8.png Aug 06, 2014 1:35:54 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_9.png Aug 06, 2014 1:35:54 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_10.png Aug 06, 2014 1:35:54 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_11.png Aug 06, 2014 1:35:55 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_12.png Aug 06, 2014 1:35:55 PM org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation: i Image Created -> 04-Request-Headers_13.png Converted Images are saved at -> C:\Documents\Converted_PdfFiles_to_Image 

Solution for Apache PDFBox 2.0.* version:

Required Jars pdfbox-2.0.16.jar, fontbox-2.0.16.jar, commons-logging-1.2.jar

or from the pom.xml dependencies

<!-- https://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox --> <dependency>     <groupId>org.apache.pdfbox</groupId>     <artifactId>pdfbox</artifactId>     <version>2.0.16</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.pdfbox/fontbox --> <dependency>     <groupId>org.apache.pdfbox</groupId>     <artifactId>fontbox</artifactId>     <version>2.0.16</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging --> <dependency>     <groupId>commons-logging</groupId>     <artifactId>commons-logging</artifactId>     <version>1.2</version> </dependency> 

Solution for 2.0.16 version:

package com.pdf.pdfbox.examples;  import java.awt.image.BufferedImage; import java.io.File;  import javax.imageio.ImageIO;  import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.rendering.ImageType; import org.apache.pdfbox.rendering.PDFRenderer;  /**  *   * @author venkataudaykiranp  *   * @version 2.0.16(Apache PDFBox version support)  *  */ public class ConvertPDFPagesToImages {     public static void main(String[] args) {         try {             String sourceDir = "C:\\Users\\venkataudaykiranp\\Downloads\\04-Request-Headers.pdf"; // Pdf files are read from this folder             String destinationDir = "C:\\Users\\venkataudaykiranp\\Downloads\\Converted_PdfFiles_to_Image/"; // converted images from pdf document are saved here              File sourceFile = new File(sourceDir);             File destinationFile = new File(destinationDir);             if (!destinationFile.exists()) {                 destinationFile.mkdir();                 System.out.println("Folder Created -> "+ destinationFile.getAbsolutePath());             }             if (sourceFile.exists()) {                 System.out.println("Images copied to Folder Location: "+ destinationFile.getAbsolutePath());                              PDDocument document = PDDocument.load(sourceFile);                 PDFRenderer pdfRenderer = new PDFRenderer(document);                  int numberOfPages = document.getNumberOfPages();                 System.out.println("Total files to be converting -> "+ numberOfPages);                  String fileName = sourceFile.getName().replace(".pdf", "");                              String fileExtension= "png";                 /*                  * 600 dpi give good image clarity but size of each image is 2x times of 300 dpi.                  * Ex:  1. For 300dpi 04-Request-Headers_2.png expected size is 797 KB                  *      2. For 600dpi 04-Request-Headers_2.png expected size is 2.42 MB                  */                 int dpi = 300;// use less dpi for to save more space in harddisk. For professional usage you can use more than 300dpi                   for (int i = 0; i < numberOfPages; ++i) {                     File outPutFile = new File(destinationDir + fileName +"_"+ (i+1) +"."+ fileExtension);                     BufferedImage bImage = pdfRenderer.renderImageWithDPI(i, dpi, ImageType.RGB);                     ImageIO.write(bImage, fileExtension, outPutFile);                 }                  document.close();                 System.out.println("Converted Images are saved at -> "+ destinationFile.getAbsolutePath());             } else {                 System.err.println(sourceFile.getName() +" File not exists");             }         } catch (Exception e) {             e.printStackTrace();         }     } }