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https://issues.apache.org/jira/browse/PDFBOX-4043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299772#comment-16299772
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Arjohn Kampman commented on PDFBOX-4043:
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Thanks for the quick fix! I can confirm that ExtractImages now extracts the 
images that were missing before. However, I had actually expected a fix in 
class PDFGraphicsStreamEngine, which is what we use to find and process images 
from PDF files. Would it be possible to move the changes to this class instead?

> ExtractImages doesn't extract images from PDPatterns
> ----------------------------------------------------
>
>                 Key: PDFBOX-4043
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4043
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Utilities
>    Affects Versions: 2.0.8
>            Reporter: Arjohn Kampman
>            Assignee: Tilman Hausherr
>             Fix For: 2.0.9, 3.0.0 PDFBox
>
>         Attachments: Angular-win2pdf.pdf
>
>
> The ExtractImages tool (or the underlying PDFGraphicsStreamEngine) doesn't 
> extract images from PDPattern objects, even if they are shown on the page. 
> We've found that Win2PDF stores images in such patterns. I have attached a 
> sample file that this tool has generated from the Angular website. The sample 
> clearly shows many images, but ExtractImages  finds none of these.



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