Upsampling for larger prints?

[Worm324]

I have an image I would like to get printed bigger than 8x10, but do to the low resolution of my camera and the crop I made its total resolution is only 1212x 1818 @303ppi

Any idea how big I can blow up that image up?

My concern is the loss of the upsampling. You think I can get away with larger than 8x10 ish? or even 8x10? I know the current size is not 8x10 format, but i will rework the image if thats as large as I can go to get a quality print.

I have never printed anything larger than an 8x10 so this is uncharted territory for me.

Thanks in advance,

Jay

[Mr. Pickles]

You could get an 8x12 out of it, but that would be max probably.

It is a hard thing to say, because in actuality it depends on a number of factors including the images subject (really detailed, or soft) and viewing distance. Might help a bit if you put a 1" decorative border round the whole thing and print an 8x12 or 8x10 too...

[Worm324]

Thats a really good call!! I never thought of that

Thankyou

Jay

[Latinbob]

If you use Photoshop, you could download the trial version of Genuine Fractals and see how that does. You get a limited number of up-samples, but there are no restrictions or water marks on the pictures.

You can download the software here: http://www.ononesoftware.com/download.php

I've played with the trial version and it works great. If I had to up-sample a lot, I'd buy it in a heartbeat.

Bob

[Blinky]

I agree with Pickles (which is really weird), 8" on the short side at 150dpi. The factors he mentions are also true... you could blow it up to 16x20 and it would look fine from 10' away, so long as you sharpened it and upped the saturation some.

Genuine Fractals is a remarkable piece of software that goes well beyond straight upsampling. I've seen images go from 8x10 at 150dpi to 30x40.

[aam1234]

Qimage can help you with that, though I don't have the S/W myself.

[Worm324]

Thanks for the help * I'll look into those software options.* *I think I'm going to try the 8x12 with an inch border of white for now and see how it comes out.* *That software sounds really intersting though.* *If its not to much money maybe I'll look into that.* Almost all of my pictures were taken with a 4 megapixel or less

Thanks,

Jay

[abortretryfail]

I heard there's manual method for up sizing pics by increasing pixel size little by little.
Could anyone enlighten us on that?

[Mr. Pickles]

Upsampling by increasing about 10% each time is a way to do it. But it was the way in PS7 and earlier (I think it was 7). With the advent of Bicubic, Bicubic Sharper, and Bicubic Smoother, the 10% method isn't what it was.

Doing it with Bicubic in one quick jump yields better results than the bunch of 10% jumps.

[craftysnapper]

It also depends on how you are having it printed inkjet print or photographic print, for some reason traditional photographic printers seem to be able to get better results from less pixels, it may be because they use there own upsampling methods.

My commercial printer (Photobox UK )gives a quality advise of a minimum of 1000pixels and 2000 prefered pixels on the long side for a 15 inch print.

I very often have 16x12 and 20x16 done from my E-1 with a 5mp resolution ..of course the quality of the pixels has as much to do with image quality as the amount

[Rense]

If you have some money to spent, please take a look at blowup from alienskin.
It works like charm! We had a 640x480 pixel image at 72 dpi blown up to 110cm wide at 300 dpi and got a very good print out of it.

The 110% upsizing method works like:
1) go to the resize box,
2) figure out how many percent you have to upscale by first typing in the printsize parameters (take a 300dpi)
* *in, say you need it 2 (200%) times bigger
3) you need to do the next step 8 times
4) next type in the widthfield 110% using smart resize and press oke.

the factor 8 from step 3 is calculated as log(2)/log(1.1) rounded to the next higher integer

[busterc1]

I have only done a couple of photos 16x20 Meijer store (3mp cam) all they want is a photo 8x10 300dpi crop and there software does the rest for making it larger

Qimage I do use at home and love it, I can only make 11x8.5 l did a test with and without Qimage and love the added detail Qimage gives if you have the money get it

Mike

[Worm324]

Thanks for the help/ comments

Rense I think I have a copy of that blowup program from Alienskin!! I forgot all about it and never reinstalled it on my new laptop. Wow I feel silly for that 1. I'll give it a try!!

Jay

[Rense]

Jay,
can happen. Shouldn't you be concentrating on the birthday party of your father?

[Worm324]

lol Yes I should But I need large prints also!!

Thanks again,

Jay