rasterizing to blow up?

Discussion in 'Design and Graphics' started by ifjake, Jul 13, 2006.

  1. macrumors 6502a

    Joined:
    Jan 19, 2004
    #1
    i have this image i would like to blow up into a poster as a gift, but the resolution of it is very poor and i know if i blew it up it would be pixilated and ugly. is there a way to rasterize an image (i don't think this is the correct term) so that when i blow it up instead of it being all pixel-y it's all circle-y?
     
  2. macrumors 6502

    Joined:
    Jul 9, 2006
    Location:
    Niagara County, NY
    #2
    Not sure how much you want to enlarge your image, but you could try the rasterbator (great name). I don't have the site handy, but you could easily find it with a google search. It allows you to rasterize any image and enlarge it to any size from about 3 ft by 5 ft up to larger than any surface you could possibly have to display on. The image is sent back as a pdf that you print across multiple pages. The quality is remarkable if you stand far enough away.

    edit : found website, I think it's also available as a download.
     
  3. macrumors 6502a

    supremedesigner

    Joined:
    Dec 9, 2005
    Location:
    Gainesville, Fl
  4. thread starter macrumors 6502a

    Joined:
    Jan 19, 2004
    #4
    ah that's what it's called: rasterbation. thanks. that forum link isn't valid, but i'll do a search. i also hope there's a mac app that can do this.
     
  5. thread starter macrumors 6502a

    Joined:
    Jan 19, 2004
    #5
    yeah the online app is too restricting. I want one large page and i want smaller dots. does that GIMP app or photoshop have similar capabilities. I don't really want the whole rasterbated effect just the not pixel-y blow up.
     
  6. 7on
    macrumors 601

    7on

    Joined:
    Nov 9, 2003
    Location:
    Dress Rosa
    #6
    http://en.wikipedia.org/wiki/Rasterize

     
  7. macrumors regular

    Joined:
    Feb 28, 2004
  8. macrumors 68000

    savar

    Joined:
    Jun 6, 2003
    Location:
    District of Columbia
    #8
    Thanks for saying it so I didn't have to.

    Did anybody try using it yet? I simply don't believe that it works well. This part in particular sounds bogus to me:

    Maybe I'll send something in and see what I get back. It just sounds like their algorithm is way too simplistic to blow something up thousands of times its original size...vectorization involves complex calculus and/or fractal geometry, not some goofus making a grainy mural of the pope.
     
  9. macrumors 6502

    Joined:
    Jul 9, 2006
    Location:
    Niagara County, NY
    #9
    It's certainly not a high quality product that you get back from the rasterbator site. Nothing even approaching photo quality - more like what you would see in a black and white photo in a newspaper, only much larger. I've made images that measured about 5 by 7 feet, and were easily recognizable from about 40 feet away. People's faces could be identified, as well as major features of the original image, but not any fine details.

    Be aware that printing these files takes huge amounts of ink/toner. You're basically printing 25 or more pages that probably average 50% coverage or so. I usually did them at work on a laser printer, and had to print in 7 or 8 page chunks so the printer didn't overheat and leave streaks.
     
  10. macrumors 6502a

    Joined:
    Apr 29, 2003
    Location:
    New Zealand
    #10
    Photoshop CS2 has upsample abilities which are not to bad.Open your image in CS2 and instead of using bicubic change it to bicubic smoother for upsample and sharper for downsample.It might come out ok depending on how much you want to upsample.There are also smart objects in CS2,mind you the result will be the same with a smart object is my guess.
     

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