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https://issues.apache.org/jira/browse/PDFBOX-2128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14028240#comment-14028240
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Tilman Hausherr commented on PDFBOX-2128:
-----------------------------------------
I did a few tests with Apache Imaging and it looks promising. The call is
different than the one you used, but maybe this is because there are different
versions and it is all very confusing, see IMAGING-135.
{code}
ImageInfo imageInfo = Imaging.getImageInfo(....);
System.out.println (imageInfo);
{code}
This brings this (first is the Porsche file, second is the Capital file):
{quote}
Format Details: Jpeg/JFIF v.1.1
Bits Per Pixel: 32
Comments: 0
Format: JPEG
Format Name: JPEG (Joint Photographic Experts Group) Format
Compression Algorithm: JPEG
Height: 1016
MimeType: image/jpeg
Number Of Images: 1
Physical Height Dpi: 300
Physical Height Inch: 3.3866668
Physical Width Dpi: 300
Physical Width Inch: 7.0866666
Width: 2126
Is Progressive: false
Is Transparent: false
Color Type: CMYK
Uses Palette: false
Format Details: Jpeg/DCM
Bits Per Pixel: 32
Comments: 0
Format: JPEG
Format Name: JPEG (Joint Photographic Experts Group) Format
Compression Algorithm: JPEG
Height: 717
MimeType: image/jpeg
Number Of Images: 1
Physical Height Dpi: -1
Physical Height Inch: -1.0
Physical Width Dpi: -1
Physical Width Inch: -1.0
Width: 494
Is Progressive: false
Is Transparent: false
Color Type: YCCK
Uses Palette: false
{quote}
I'll make a few tests to see whether I can get a decent rendering of your files
in the 2.0 version. It might be more difficult for the 1.8 version, which does
not render CMYK files correctly.
Apparently, the solution for you would be:
- CMYK: direct
- YCCK: pdfbox
- others: test it...
> CMYK images are not supported correctly
> ---------------------------------------
>
> Key: PDFBOX-2128
> URL: https://issues.apache.org/jira/browse/PDFBOX-2128
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.8.5, 1.8.6, 2.0.0
> Environment: Windows 7 Professional
> Running jvm: Java HotSpot(TM) 64-Bit Server VM - 1.6.0_26-b03 - 20.1-b02 -
> Sun Microsystems Inc
> Reporter: Ludovic Davoine
> Labels: PDJpeg, cmyk, images
> Attachments: porsche_cmyk.pdf-2.png
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> I have a PDF with CMYK images inside and i need to extract the images in the
> RGB format. But the PDJpeg class seems to not work correctly; the colors are
> bad. Example:
> - Original image in te PDF : http://ludoda.free.fr/IMAGE_IN_PDF.jpg
> - Extracted image: http://ludoda.free.fr/IMAGE_EXTRACTED.jpg
> You can download the PDF : http://ludoda.free.fr/PORSCHE_CMYK.PDF
> and try my simple Test Case (I'm using PDFbox 1.8.5):
> {code}
> import java.awt.image.BufferedImage;
> import java.io.File;
> import java.io.IOException;
> import java.util.Iterator;
> import java.util.List;
> import java.util.Map;
> import javax.imageio.ImageIO;
> import org.apache.pdfbox.pdmodel.PDDocument;
> import org.apache.pdfbox.pdmodel.PDPage;
> import org.apache.pdfbox.pdmodel.PDResources;
> import org.apache.pdfbox.pdmodel.graphics.xobject.PDJpeg;
> import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObject;
> import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage;
> public class TestCase {
>
> public static void main(String[] args)
> {
> try
> {
> System.out.println("START EXTRACTING IMAGES...");
> read_pdf();
> System.out.println("COMPLETE");
> }
> catch (IOException ex)
> {
> System.out.println("" + ex);
> }
> }
> public static void read_pdf() throws IOException
> {
> PDDocument document = null;
> document = PDDocument.load("C:\\temp\\PORSCHE_CMYK.pdf");
> @SuppressWarnings("unchecked")
> List<PDPage> pages =
> document.getDocumentCatalog().getAllPages();
> Iterator<PDPage> iter = pages.iterator();
> int i =1;
> while (iter.hasNext())
> {
> PDPage page = (PDPage) iter.next();
> PDResources resources = page.getResources();
> Map<String, PDXObject> pageImages =
> resources.getXObjects();
> if (pageImages != null)
> {
> Iterator<String> imageIter =
> pageImages.keySet().iterator();
> while (imageIter.hasNext())
> {
> String key = (String) imageIter.next();
> if(pageImages.get(key) instanceof
> PDXObjectImage)
> {
> PDJpeg image = (PDJpeg)
> pageImages.get(key);
>
> // Test 1 : write2file
>
> image.write2file("C:\\workspace\\JAVA_PDFTools\\temp\\image" + i);
>
> // Test 2: getRGBImage
> BufferedImage
> bimage=image.getRGBImage();
> File outputfile = new
> File("C:\\workspace\\JAVA_PDFTools\\temp\\image" + i+"_buffered.jpg");
> ImageIO.write(bimage, "jpg",
> outputfile);
> i ++;
> }
> }
> }
> }
> }
> }
> {code}
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