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7/11/13
Original Poster
Brett Morrison

.pdf views in distorted indexed color.

I have started to use Google Drive/docs to share documents. Hopefully to embed them. But when I upload a .pdf google drive viewer distorts the photos. It looks like it puts them into 64 colors instead of the full color range. Indexed colors like a bad .gif. Does anyone have a solution?
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All Replies (5)
7/11/13
Original Poster
Brett Morrison
DAS1951
7/12/13
DAS1951
Brett, it is a viewer. No viewer guarantees an accurate representation of the content.  When I downloaded the document into my pdf reader (Nitro Reader 3 in this case) the picture was fine.
Google user
10/20/13
Google user
Having the same problem. Did you find a solution?
Bas Braams
12/12/13
Bas Braams
Color rendition in the Docs+Drive viewer is still really bad, as discussed in a few other posts as well. Following Turkeyphant on the Drive forum [1] and on Stackoverflow [2] I note that the Docs+Drive viewer appears to use only 32 colors (5 bits). If a picture is recognized to be a grayscale picture then one gets 32 gradations of gray, which actually isn't so bad; see the SIPI collection of examples that is provided under [3]. If it a picture is recognized as a color picture then one gets 32 colors, which is awful; for example see [4-5]. And, apparently, if a picture is a mixture of B/W and color then one gets 16 shades of gray and 16 colors, which is worst [6].

Please find attached screen captures (in PNG format; details are described in [6]) for a mixed grayscale and color pdf file as it appears on the screen when viewed through the Docs+Drive viewer (first image; awful) and when viewed through a regular browser pdf viewer (second image; fine). Click on the image to amplify it. In the image of the view through the Docs+Drive viewer one can count the 16 grays and 16 colors.

If one has spent some effort to produce a pdf file that uses color then one really doesn't want to present it to the world in a way that causes viewers to see it through the Docs+Drive viewer. One will not share the file to the world through the Docs+Drive cloud.

[1] (2013-05-22) Google Docs Viewer mangling colours on images

[2] (2013-05-20) Poor image rendering with Google Docs PDF viewer

[3] (2013-12-03) Re: Low resolution/bad quality for images when printing/exporting to pdf

[4] (2012-12-01) Re: Google Drive PDF viewer is so bad in displaying color

[5] (2012-11-30) Re: horrible pdf image resolution - color blends striate

[6] (2012-12-08) Re: Google Docs Viewer mangling colours on images
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