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increasing an Iphone image for a large (48x36) print
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Aug 18, 2023 09:46:14   #
kliese
 
2049 Pix x 1537 pix is the original dimensions and 72 PPi this is the file i received from the client. they want a very large print 48x60. I have tried a varity of things in PS image size> changing the dimensions and or the resolution and or the resample options if i increase the dimensions the resoltion drops to around 42PPi when i increase the resolution and the dimension size the screen preview shows a fairly blurry image at 100%
Any best practice ideas out there in hedgehog landia? _ Kurt

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Aug 18, 2023 10:06:07   #
pithydoug Loc: Catskill Mountains, NY
 
kliese wrote:
2049 Pix x 1537 pix is the original dimensions and 72 PPi this is the file i received from the client. they want a very large print 48x60. I have tried a varity of things in PS image size> changing the dimensions and or the resolution and or the resample options if i increase the dimensions the resoltion drops to around 42PPi when i increase the resolution and the dimension size the screen preview shows a fairly blurry image at 100%
Any best practice ideas out there in hedgehog landia? _ Kurt
2049 Pix x 1537 pix is the original dimensions and... (show quote)


You can always try Gigapixel but I'm not sure of the quality even making it larger.

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Aug 18, 2023 10:10:24   #
Just Fred Loc: Darwin's Waiting Room
 
You may not wish to spend money on another photo editing product, but ON1 Photo Raw has "Resize AI" in their 2023.5 release. You can see how it works here:

https://www.on1.com/products/resize-ai/

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Aug 18, 2023 10:41:21   #
JohnSwanda Loc: San Francisco
 
Gigapixel type software can enlarge what is there, but if there are flaws in the cell phone photo like bad focus or blur they will just be exaggerated printing it that large. You might try enlarging the file to printing size and then crop out an 8x10 sized portion to print and see how it holds up that large.

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Aug 18, 2023 11:07:53   #
R.G. Loc: Scotland
 
It depends on the viewing distance. If it's likely to be no less than 3 feet then 100 PPI would do. If the viewing distance is guaranteed to be more, you can consider a lower PPI such as 72. 100PPI requires a resolution of 4800 x 6000 for a 48x60 print (your text says 60" but your title says 36"?). If Ps can't increase to that size (6000 on the longest edge) you need one of the AI upsizing packages.

If it's 48x36 as specified in the title, the image size would be 4800 on the longest edge (to give 100 PPI for the 48x36 print). That would be easier to achieve.

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Aug 18, 2023 11:11:07   #
kliese
 
it is 48x36

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Aug 18, 2023 11:14:18   #
mikegreenwald Loc: Illinois
 
I've had Bay Photo do it for me with excellent results. I don't know how they did it though - I was unable to do it myself with several PP programs. I wasted one expensive print on my Epson 9600 large format printer (40" x up to 100'). My shots were from a Samsung S9 cellphone, around three or four years ago.
I can thus only tell you it can be done, which isn't really much help!

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Aug 18, 2023 11:27:52   #
R.G. Loc: Scotland
 
kliese wrote:
it is 48x36


This is a quote from the internet (so it must be true ) -

"100 PPI is perfect for prints larger than 16" x 24" up to 32" x 48" as no noticeable quality loss will be noticeable from a short viewing distance of 3 feet away".

When you see it on your monitor you may be zooming in too close. If you can get 4800 on the longest edge, go with that. As I said before, if PS can't do it, find some AI that can (or find somebody that can do it for you).

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Aug 18, 2023 12:23:28   #
MJPerini
 
The first thing I would ask is if you have the best possible version of the picture from your client.
Most phones can output RAW or at least Actual Size (which will be the largest JPEG)
Phones are great, but still small sensor devices, so getting the best possible original can help get the best possible output.
I would also employ the tactic suggested above of showing the client an enlarger 8x10 section of what the print will look like before you attempt a large print
Good Luck

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Aug 18, 2023 13:11:31   #
jamesl Loc: Pennsylvania
 
kliese wrote:
2049 Pix x 1537 pix is the original dimensions and 72 PPi this is the file i received from the client. they want a very large print 48x60. I have tried a varity of things in PS image size> changing the dimensions and or the resolution and or the resample options if i increase the dimensions the resoltion drops to around 42PPi when i increase the resolution and the dimension size the screen preview shows a fairly blurry image at 100%
Any best practice ideas out there in hedgehog landia? _ Kurt
2049 Pix x 1537 pix is the original dimensions and... (show quote)


--------
Request the client give you a higher resolution image.

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Aug 18, 2023 13:32:59   #
cahale Loc: San Angelo, TX
 
kliese wrote:
2049 Pix x 1537 pix is the original dimensions and 72 PPi this is the file i received from the client. they want a very large print 48x60. I have tried a varity of things in PS image size> changing the dimensions and or the resolution and or the resample options if i increase the dimensions the resoltion drops to around 42PPi when i increase the resolution and the dimension size the screen preview shows a fairly blurry image at 100%
Any best practice ideas out there in hedgehog landia? _ Kurt
2049 Pix x 1537 pix is the original dimensions and... (show quote)


If you can obtain a sharp photo (5 X 7 or so) from the digital file, scan said photo at 600-800 and work from that. It still may not be adequate for such a large print, but I have had better results doing that than by playing around with processing software first.

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Aug 18, 2023 14:17:26   #
stan0301 Loc: Colorado
 
Have you used Topaz? They would let you have a free try - it is the same program they use for the Times Square billboard

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Aug 19, 2023 08:47:46   #
Canisdirus
 
Adobe can blow it up...

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Aug 19, 2023 13:24:54   #
BigOldArt Loc: Seminole, FL
 
Did you ask your client if the original photo is higher resolution?

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Aug 19, 2023 13:53:08   #
R.G. Loc: Scotland
 
If you're confident that you've seen the quality level of the resulting print and it's not good, and if it's not improvable using AI software, contact the customer and tell them the original file isn't good enough to produce a quality print at the requested size.

Even if the original image isn't particularly sharp it may be possible to use a sharpening tool that will get it looking acceptable. That is the sort of situation where AI software shows its worth.

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