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  • question pertaining to scaling up images

    #1
    Ok, I have question pertaining to scaling up images.

    We are producing trade-show booth graphics, essentially scaling up existing collateral for use on our "pop up" trade-show display.

    Is there a hard/fast rule to scaling up? My original images (CMYK TIFs and PSDs, without any rasterized text) are pretty large h/w already at their native 300dpi, but I am still having to scale them up almost 300%

    How much of a big deal is this? Will this create any glaringly obvious problems? The original images exist as TIFs and PSDs, so I don't think I'll have JPG artifacts.

    I mean how to bill board designers do this? They can't possibly work at the true h/w? Do they?

    Just wondering if anyone else has expertise here. I have never had to repurpose an image like this.

    Thanks
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  • #2
    There is no best way to upscale an image. One thing you can do is make sure Bicubic Smoother is selected in the Resample drop down menu, and perhaps use a tiny Gaussian blur. You also may not have to keep these images at 300 dpi if your graphics won't be viewed up close. The resolution for photos on billboards can be what we might consider appallingly low - but since they're generally viewed from at least several yards away you can't tell.

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    • #3
      PrintDriver is the large format guy whom I'm sure will give the best advice on this. As far as scaling up my understanding is you should scale up in increments of 10%.

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      • #4
        cool, hopefully printdriver will see this thread

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        • #5
          You should talk to the printer doing your pop-ups but generally if you are at anywhere from 100-200dpi at final size you will probably be ok. 300dpi at 300% is 100dpi.

          Again, talk to your printer, but you can work in scale if using Quark but if using InDesign or Illustrator it is always good to work at actual size or 1/2 scale. That way if you do anything with a filter you oughtn't, likely as not it will be ok. Not always, but you stand a better chance (use Effect for drop shadows and watch your Raster Effects Resolution setting).

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          • #6
            i'm working in ID CS2. I don't have anything odd except for one transparency and all my type is on a layer above that:

            Layer 3: Type
            Layer 2: Various vector junk + transparent box
            Bottom Layer, Layer 1: TIFF @ 300%

            that's it. I'll pray it turns out ok lol. i did just print a tile of it to our post script laser printer in the office and the image looks ok as far as clarity goes, not sure how that compares to the digital printer the vendor is using though or how they are preflighting it

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            • #7
              Full scale on a good inkjet set on top print quality would be a better judge than a laser print. Not a photo printer mind you, but a good quality inkjet.

              Be sure to call out any PMS colors you want matched and send the layered file. Nothing sucks more in wide format than a flat PDF. Preflighting involves color and image profiling and other picky work.

              Get a proof!

              Comment

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