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best way to keep small filesize and sharp appearance when importing PDF images to powerpoint

Posted on 2016-10-12
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Last Modified: 2016-10-31
I have a 50 slide PPT file that has about 20 image files and now the filesize is more than 5 MB. We want to keep the filesize small enough to easily email but keep the images crisp for presentation. The images are all Acrobat PDFs created for printing. What's the best way to export the pdfs for best image quality and resolution to be presented on a laptop and viewed via Go To Meeting?
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Question by:rumorandfolly
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by:Echo_S
Echo_S earned 167 total points (awarded by participants)
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I would export the PDF pages as PNGs.
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by:rumorandfolly
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At what settings? When I exported at 96 ppi the images were very blurry.
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Jamie Garroch earned 167 total points (awarded by participants)
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Once you've imported the images, the file size can be adjusted by setting the output resolution in the file when you save it. Click the options at save time then click the advanced tab to locate the 'dpi' setting. High Fidelity (I'm referring to PowerPoint 2016)  will be the best quality and highest files size. Using 96dpi will be great for minimal file size but image quality will suffer. It's a compromise between the two and if your presentation is import (it should be, otherwise why create it?) you could keep the best quality and use one of many cloud services to deliver presentations electronically. Don't forget that once you've used one of the lower quality settings, you cannot revert back to the highest quality images. Once the quality has gone, it's gone forever, unless you keep a separate copy of the deck at high res.
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by:rumorandfolly
ID: 41840750
Would it be beneficial to export the pdfs to pngs or jpgs from Acrobat DC at a particular setting to ensure good quality but smaller size? Or would it help to open the PDFs in photoshop and export to another file format and resolution?
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by:Joe Winograd, EE MVE
Joe Winograd, EE MVE earned 166 total points (awarded by participants)
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> At what settings? When I exported at 96 ppi the images were very blurry.

I recommend at least 150, perhaps 200-250, maybe even 300. This 5-minute EE video Micro Tutorial shows how to do it with an excellent utility:
Xpdf - PDFtoPNG - Command Line Utility to Convert a Multi-page PDF File into Separate PNG Files

Notice the -r (resolution) parameter. I suggest experimenting with different values of it to achieve the balance of file size and image quality that is satisfactory for you (my experience for color images is that the 150-250 range provides a good balance of size and quality). Regards, Joe
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by:Echo_S
Echo_S earned 167 total points (awarded by participants)
ID: 41840814
If the images are vector, I'd open the PDF in Illustrator and export EMF images, or even PNGs, from there. How big you need to export them as (for PNG) really depends on the original size.
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by:Joe Winograd, EE MVE
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The selected posts all provide solutions. Splitting the points evenly among the three experts who participated.
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