Post Reply 

Making an A1 poster

Sep 8, 2011, 18:29
Post: #1
Making an A1 poster
I need to make a poster in A1 size and I would like to know whether it is feasible to do so with GIMP, because I've seen the list of templates when making a new file and the size goes only up to A3 format. I hope someone here has some experience with designing posters, who can recommend me something else if GIMP will not work.
I realize I can do the designing in A3 format and just print the A1 sheet, but I don't know if this will yield good results when considering the resolution and such.
Thanks in advance..
Find all posts by this user
Quote this message in a reply
Sep 8, 2011, 19:14
Post: #2
RE: Making an A1 poster
It all depends how close you expect the people to be. For close up view, decent quality printing starts at 150DPI, so since A1 is 23.4 × 33.1 inches, which, at 150PPI, is a 3510 × 4695 pixels picture, roughly the size of what produce a good camera those days. No problem working on images that size in Gimp, even if some processing can take a small while.

If people are expected to see the image from a distance where they can catch the whole picture, there is strictly no need to go above 6 MPixels.

Printing that image correctly on 8 sheets of A4 paper or even 4 of A3 (actually, slightly more because you'll likely not have a printer that does border to border printing) may be more of a challenge.

If your poster is mostly line art, you can also look into using vector graphics (as opposed to the bitmap graphics done in Gimp). Gimp's counterpart for vector graphics is called InkScape.

[Image: 2Tvo0.png]

Visit this user's website Find all posts by this user
Quote this message in a reply
Sep 9, 2011, 01:29 (This post was last modified: Sep 9, 2011 01:33 by Walker.)
Post: #3
RE: Making an A1 poster
Thanks a lot for the clarification. Well my poster is going to have some pics, models and figures along with a significant amount of text. The text will be a bit large, but nevertheless people will need to get close to the poster to read it all. So I don't quite know whether Inkscape would be appropriate.

One thing that struck me though, is the file size when upping the ppi. I tried your recommendation for de ppi and the number of pixels came out about the same as you predicted (3508 x 4966, the height seems a bit too much, how come? Are A1's different in millimeters? I don't think so..) but then I get myself a warning that the file would be around 160MB, which is tremendous for what I'm used to. The largest pics I've worked with have not been much larger than 10MB. Is this a reasonable estimation about how large a file my poster will be?
Find all posts by this user
Quote this message in a reply
Sep 9, 2011, 06:34
Post: #4
RE: Making an A1 poster
Not quite...

it's the size of one layer in memory, and such an image will likely have several layers. I have a 6000x4000 image (450MB/layer) with around 10 layers and it uses 1GB when loaded in memory (because many layers are not a big as the full image). It"s quite smaller on the disk, and Gimp has a compressed file format (lossless compression of course)(save file with extension .xcfbz2) (my image is only 60MB in that format). Of course these images sizes aren't trivial to process, but Gimp handles them without trouble (I did mine in a 2GB machine).

Your pixel sizes are correct 4695 is a typo, it hsould have been 4965.

[Image: 2Tvo0.png]

Visit this user's website Find all posts by this user
Quote this message in a reply
Sep 14, 2011, 19:35
Post: #5
RE: Making an A1 poster
Thanks for all the tips, the poster turned out great.
Find all posts by this user
Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Making a gif that shows middle portion of a word Deaf Smith 4 176 Sep 28, 2014 22:02
Last Post: iForStyle007
  Making computer-animated playing cards look real Goof 1 418 Aug 19, 2014 20:44
Last Post: ofnuts
Question Making a twin bunzplayer 3 153 Jul 22, 2014 16:20
Last Post: ofnuts
  Making Trophies With GIMP plow250 15 1,123 Feb 28, 2014 02:55
Last Post: fluffybunny2
  Making a Color to Gradient Dynamics JasonG 1 288 Dec 17, 2013 16:18
Last Post: rich2005

Forum Jump:


GIMP ForumPortalArchiveContactTermsRSS