What you can do is to use the Adobe ICC profile, download it here:
https://www.adobe.com/support/downloads/iccprofiles/iccprofiles_win.html


        PDDeviceCMYK.INSTANCE = new PDDeviceCMYK()
        {
            @Override
            protected ICC_Profile getICCProfile() throws IOException
            {
                return ICC_Profile.getInstance("USWebCoatedSWOP.icc");
            }
        };

Tilman

On 09.06.2023 19:11, Daves Open wrote:
I'm sorry Tilman.  Your response got caught in my spam folder and I just
saw it now.  I'm using version 2.0.28.

Dave

On Thu, May 25, 2023 at 1:38 PM Tilman Hausherr <thaush...@t-online.de>
wrote:

The PDF looks familier. We're not using the same icc colorspace than
Adobe, that is why. However it was recently changed, are you using 2.0.28 ?

Tilman

On 25.05.2023 19:03, Daves Open wrote:
I am using PDFBox to convert PDF pages to images.  However, this one
particular PDF is rendering too dark.  The PDF can be found here
https://www.sldttc.org/allpdf/21583473018.pdf.

I'm seeing the same rendering when using the PDFDebugger tool.  LibreDraw
shows the PDF as CMYK, but I'm not seeing colorspace information in
PDFDebugger.

Can someone please explain why PDFBox is not rendering this PDF
correctly?
Thanks,

Dave


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