Save As PDF downsamples image

If I Insert Image from File, and do Save As PDF, how to get word to keep the exact same image in the PDF?  No compression, no conversion.

Currently, I start with an PNG image that is 1477 x 720 pixels.  The PNG image has the resolution flag set at 600 dpi.

When I save as PDF, I then open the PDF in acrobat, and copy the image, and paste the image into MS Paint.  The image size becomes 492 x 240.

Basically Word downsampled the image to 200 dpi.

I've tried every solution suggested:
-using the PDF or XPS add-on (same results)
-setting the Tools -> Compress Pictures... -> Options -> .. and unchecking the 'Automatically perform basic compression on save'.  (tried both clicking cancel and OK).
-adding key to registry HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Word\Options\AutomaticPictureCompressionDefault  = 0
-tried saving through the Word interface as well as through C#.
-tried saving in C# using two different functions:

wrdDoc2.ExportAsFixedFormat("C:\\blah.pdf", Microsoft.Office.Interop.Word.WdExportFormat.wdExportFormatPDF, false,
 Microsoft.Office.Interop.Word.WdExportOptimizeFor.wdExportOptimizeForPrint, Microsoft.Office.Interop.Word.WdExportRange.wdExportAllDocument, 1,1,
 Microsoft.Office.Interop.Word.WdExportItem.wdExportDocumentContent, false, true, Microsoft.Office.Interop.Word.WdExportCreateBookmarks.wdExportCreateNoBookmarks,
true, true, false, m);

and

        wrdDoc2.SaveAs("C:\\blah2.pdf", Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatPDF, m, m, m, m, m, true, m, m, m, m, m, m, m, m);

-tried printing using to 'Adobe PDF' printer using high res.  This works, but the file size explode because all the images are stored as the bitmap version and not the PNG version.
-I've also done the same experiment using GIF and JPG images, no better.

If I Insert Image from File, and do Save As PDF, how to get word to keep the exact same image in the PDF?  No compression, no conversion.

 

Question Info


Last updated December 18, 2018 Views 3,136 Applies to:
Does the image show up fine in Word?
Insert an image with image size around 100 to 200 DPI and check if the image resolution changes after saving the file as PDF.

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Yes, Word preserves the image data when the document is saved in .doc and .docx format.

I did the test you suggested.  I opened paint, create a 200x200 area, and pasted that into word.

In Word, I would resize the square to be smaller.  I tried resizing it to be 1" x 1".    There was no downsampling.  However, when I resized it to 1/4" by 1/4", there was downsampling.

As soon as Word saves an image to PDF, it's not preserving the original image data if the dpi is higher than 200 dpi.

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The 'Standard'mode used to convert word documents to PDF will decrease image quality if DPI is very large.
Make sure you insert an image which is not larger than the page size and the DPI should be within 96 DPI to 200 DPI.
Also do most of the image editing (Crop, Resize, etc) outside word and insert the final image to word.

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The 'Standard'mode used to convert word documents to PDF will decrease image quality if DPI is very large.
Make sure you insert an image which is not larger than the page size and the DPI should be within 96 DPI to 200 DPI.
Also do most of the image editing (Crop, Resize, etc) outside word and insert the final image to word.

Word should leave the decision of what dpi to use up to the user and store the image in the file encoded in its native format.  Word should not be downsampling the image.

Your suggestions do not address the problem I'm trying to solve.  When you have a professional level printer that is capable of printing at 4000 dpi, using 200 dpi is a joke.

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Agree with rkippen.  I have the same problem.  I don't know how people can use Word to format a book when it downsamples so aggressively.  How can one layout a book and produce a publishable PDF if not using Word?

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Try using the free PrimoPDF converter to convert (print) you document to a pdf file.

In it's Prepress mode, the default setting is for "No Downsampling"

Hope this helps,
Doug Robbins - Word MVP
dougrobbinsmvp@gmail.com
Screen shots by Snagit from www.techsmith.com

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Thank Doug Robbins very much!

Your advice is the best one to solve the pdf generation problem from MS Word for high dpi pictures. I simply print my Word into the primopdf "printer", and every pictures are perfect quality in pdf file!

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