[jira] [Commented] (PDFBOX-3844) Is there jpeg-compression of images?

["Mikhail Semionenko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-3844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16071842#comment-16071842 ] 

Mikhail Semionenko commented on PDFBOX-3844:
--------------------------------------------

I've already specified the moment with CMYK images, and I'm already using build 2.0.7, the link to which I was given in task PDFBOX-3823.

You indicated that you need to use JPEGFactory, but I'm working with the code from PDFBOX-3823, and I get PDImageXObject as CMYK without compression. JPEGFactory does not work with CMYK images. Are there any other ways to compress CMYK images?

> Is there jpeg-compression of images?
> ------------------------------------
>
>                 Key: PDFBOX-3844
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3844
>             Project: PDFBox
>          Issue Type: New Feature
>            Reporter: Mikhail Semionenko
>         Attachments: Screen Shot 2017-06-30 at 12.16.02.png, Screen Shot 2017-06-30 at 15.39.45.png, Screen Shot 2017-06-30 at 15.47.46.png
>
>
> If you add large images in PDF, the resulting document becomes large. I've added about 80 images in size 2100x2100px in the document, and got about 400-500mb in the PDF file. 
> From the document analysis (attached screen shot from Acrobate Pro DC), you can see that zip / flate compression is used for added images. I would like to be able to compress images in a document using jpeg compression (something like industry-standard compression filters). Is there such an opportunity now? Can it be add in the future?
> P.S. RGB and CMYK images are used.
> Thanks.



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