Reduce PDF file color depth

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David.P
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Reduce PDF file color depth

Post by David.P » Sun Apr 26, 2020 3:10 pm

Hello Forum and Tracker Support Team,

in order to reduce the file size of PDF files, I think it would be very useful to be able to reduce the color depth of a PDF.

For example, I have a PDF with 1500 (bitmap) pages, which is about 1 GB in size.

The PDF pages are currently contained as True Color 24 Bit (16 million colors) in the PDF, and this way, one page occupies about 760 kB. In fact however, the pages only contain 8 bits, i.e. 256 colors in this file.

With 8 bit instead of 24 bit, one page occupies only about 212 kB. Therefore, the file size of that PDF could be reduced from 1 GB to about 280 MB if all pages would be reduced from 24 bit to 8 bit color depth, without any degradation in image quality.

I believe that this function could either be implemented in the "Optimize PDF" dialog of PDF-XChange Editor, or in the "Convert Colors" dialog of PDF Tools:

Image

Image

Many thanks for considering this as a feature request!

Best regards
David
David.P
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Arnold
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Re: Reduce PDF file color depth

Post by Arnold » Mon Apr 27, 2020 6:19 am

+1

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Tracker Supp-Stefan
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Re: Reduce PDF file color depth

Post by Tracker Supp-Stefan » Mon Apr 27, 2020 12:10 pm

Hello David and Arnold,

Thanks for your idea and suggestion. I will pass this for consideration, but can not make any promises as to whether it will be accepted for implementation!

Kind regards,
Stefan

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David.P
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Re: Reduce PDF file color depth

Post by David.P » Mon Apr 27, 2020 12:50 pm

Thank you for the fast action, Stefan!
Best regards
David
:)
David.P
PDF-XChange Pro

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Tracker Supp-Stefan
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Reduce PDF file color depth

Post by Tracker Supp-Stefan » Mon Apr 27, 2020 12:56 pm

:)

dave.kracht
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Re: Reduce PDF file color depth

Post by dave.kracht » Thu May 14, 2020 6:32 pm

+1 from me : This is the feature I need, too.

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Dimitar - Tracker Supp
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Reduce PDF file color depth

Post by Dimitar - Tracker Supp » Fri May 15, 2020 8:47 am

:)

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