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Blurry PDF thumbnail
Posted: 2011-10-22T12:45:56-07:00
by doherty
When I create a thumbnail of this PDF, I get the PNG attached, which is utterly inadequate. The command line used was:
Code: Select all
convert in.pdf -thumbnail 1000x1000 out.png
Bah, I don't think I can attach files D:
Well, the PDF in question was
https://minus.com/mike-cards#6 - and you can see the thumbnail that got generated for it. Compare by downloading the actual PDF file.
Re: Blurry PDF thumbnail
Posted: 2011-10-22T13:44:08-07:00
by fmw42
try
convert -density 150 in.pdf -thumbnail 1000x1000 out.png
or if that does not work adequately increase the density.
Re: Blurry PDF thumbnail
Posted: 2011-10-22T14:41:29-07:00
by doherty
Thank you for the suggestion. I assumed it'd choose the right density for the thumbnail size.
I had to increase the density way up to get a decent thumbnail. But, that'll do! Thanks again.
Re: Blurry PDF thumbnail
Posted: 2011-11-02T10:31:08-07:00
by tedanoell
How to choose the right density for a thumbnail?
Re: Blurry PDF thumbnail
Posted: 2011-11-02T20:56:11-07:00
by anthony
Depends on the input.
PDF's are vector images, but even so are often designed for much higher viewing resolution (printed page) than the default (screen) point resolution.
Their is no way IM can know what is an acceptable density for a specific PDF or Postscript image.