Lens Diaries Go Now
Glamour, Beauty, Nude, Models, Photographers

*    |  Register  


 
Go Back   Garage Glamour™ > Garage Glamour™ Main Forums > Tech Talk Forum
 

Tech Talk Forum Photography & Technical Related Only!

Reply
 
LinkBack Thread Tools Display Modes
Poster Size Images
Old 05-17-2005, 08:02 AM   #1 (permalink)
Fantasiesimage
Guest
 
Member GG#:
Posts: n/a
Comments:

IP: 68.103.165.143
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Hi everyone..the lady I shot these for was asking if I could make them into poster size images...24x36.. the orginal file size is 1536x2048 pixels 72 dpi.
jpeg..is there a way to do this?
Don.
 
 
Re: Poster Size Images
Old 05-17-2005, 09:08 AM   #2 (permalink)
King of Useless Facts
 
Join Date: Jan 2003
Member GG#: 35691
Location: Chicago, IL
Posts: 499
Comments: 0
Send a message via AIM to StMarc

StMarc is offline IP: 67.100.161.234
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

First of all, all we care about is the pixel count - DPI is only for screen display. (PPI is relevant to print quality but we already know the absolute pixel count so we don't care about that either. [img]/ubbthreads/images/graemlins/smile.gif[/img] )

You are looking at a 3MP image there. Poster size is a lot to ask from 3MP of data, but it can be done. In the long dimension, 2048pix/36" = 56PPI. Typically on a good inkjet printer one wants a minimum of 120PPI, preferably 180PPI. (Higher doesn't hurt but most people can't tell the difference between 180PPI and anything above it.) To reach minimum PPI, you're going to have to interpolate by at least a factor of 2.

What I personally would do is try interpolating it by a factor of 2 to get 112 PPI at target print size. Have a look at it at print size on the screen and see if it looks pixellated. If it does, try interpolating by a factor of 3 to get 168 PPI and repeat. If you get no improvement, you've reached the limit of the available resources.

The other option is to take the retouched file to a print shop and ask them to use a professional RIP program to do the enlargement at print time. They should be able to tell you whether or not they can improve on Photoshop's interpolation routine.

M
  View Public Profile Send a private message to StMarc Visit StMarc's homepage! Find More Posts by StMarc
 
Re: Poster Size Images
Old 05-17-2005, 09:21 AM   #3 (permalink)
Kurt_Gearheart
Guest
 
Member GG#:
Posts: n/a
Comments:

IP: 68.35.69.218
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Just a suggestion that has worked for me when trying to get more size from a (relatively) small original image.

Find a printer that uses a Fuji Crystal machine for their prints.

Rather than interpolating the image up yourself, convert the file to a TIFF, and just set the DPI info in the new TIFF file to exactly what will make their printing machine print it out at exactly the size you want.

Their machine will do the math... although 52 DPI sounds just awful, you may be pleasantly surprised at how well it turns out.

I discovered this when I went to my local print shop and saw an 18" x24" poster done from a 0.5 (1/2!!!) megapixel original file. The quality blew me away, I asked about it, and the guy explained the rather advanced interpolation functions of this machine.

Try it once for kicks. [img]/ubbthreads/images/graemlins/wink.gif[/img]
 
 
Re: Poster Size Images
Old 05-17-2005, 11:28 AM   #4 (permalink)
Lifetime Photographer
 
Join Date: Nov 2004
Member GG#: 40476
Location: Peachtree City
Posts: 60
Comments: 0

RM_Drake is offline IP: 66.32.222.249
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

IMHO, the "grain" of a low dpi print will enhance the "texture" of the skin in this particular shot. I'd say, "Go for it!" My suggestion: El-Co Labs. I've been pleased with the results of the 24x30s and 30x40s they've done for me. Just make sure the "canvas" is in proportion to the final size of the print (8x10 for a 24x30 print, for example). Otherwise, your photo will be "stretched" in the short dimension to fit the paper. --Randy
  View Public Profile Send a private message to RM_Drake Visit RM_Drake's homepage! Find More Posts by RM_Drake
 
Re: Poster Size Images
Old 05-17-2005, 11:32 AM   #5 (permalink)
Lifetime Photographer
 
Join Date: Nov 2004
Member GG#: 40641
Location: Sparks, NV
Posts: 375
Comments: 0

DanNV is offline IP: 134.197.92.150
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

If you can't get the printer to do a good interpolation job for you, you can try a couple of other things. The one my father uses with great success is Genuine Fractals. Not cheep, but it does a great job of interpolating an image up to a larger size. The other would be to interpolate up in 10% increments. This is recommended in some of the PS books and does seem to give better results than doing it all in one big step. And, as a third option, if you shot this in RAW, you can reprocess the RAW file and interpolate up during the RAW conversion which also gives good results.

Dan
  View Public Profile Send a private message to DanNV Find More Posts by DanNV
 
Re: Poster Size Images
Old 05-17-2005, 12:33 PM   #6 (permalink)
Lifetime Photographer

 
TomRobin's Avatar
 
Join Date: Jan 2004
Member GG#: 37855
Location: Pocasset
Posts: 150
Comments: 1

TomRobin is offline IP: 151.203.5.198
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

What Dan said has worked for me may times in the past.

Convert the file to a TIFF and increase the size of the image in 10 percent at a time. Making the change in small (10%) increments maintains the image quality. Yes, it may mean running a number of passes for the enlargement, but the results are great. I would go up to at least 150dpi (300dpi preferrable).

Scott Kelby's book The Photoshop"xx" Book for Digital Photographers has simple instructions to make an Action that simplifies the process.

1. Under the Window menu, select Actions.
2. Click Create New Action button at bottom.
3. Name your action Upsize 110% (or whatever you want)
4. Choose a Function Key that you want to assign the Action to (F11 is free)
5. Click the Record Button
6. Under Image Menu, select Image Size.
7. Make sure Resample Image is turned ON & change Interpolation Method to Bicubic Smoother.
8. Switch units of measure from Inches to Percent and enter 110%
9. Click the square Stop button at the bottom of the Actions palette to complete your recording process.

NOW, every time you press F11 on your keyboard, the image will upsize by 110%

Have fun (& get the book)
Tom
  View Public Profile Send a private message to TomRobin Visit TomRobin's homepage! Find More Posts by TomRobin
 
I assume. . .
Old 05-17-2005, 12:42 PM   #7 (permalink)
Free Member
 
Join Date: Nov 2002
Member GG#: 35436
Location: Sunset
Posts: 500
Comments: 0

cclesue is offline IP: 67.186.203.100
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

you are sending it out to print. DO NOT resample the image in Photoshop before you discuss it with your printer. To reiterate what I have said in other posts. Most of the high end printers have resampling engines that are much better than (read far more expensive) than the one one built into PS. Don't miss understand me, PS is great but resampling adds and subtracts information that might be useful to the bigger program.
I'm further assuming you do not have a raw file and that the only thing you have is the Jpeg. if so, since the finished print is very close to the desired finished size, I would do nothing to the file and take it directly to the printer. Most digital printers read Jpeg.
I hope you are not planning to retouch this in any way. It is the textures that make the image.
  View Public Profile Send a private message to cclesue Visit cclesue's homepage! Find More Posts by cclesue
 
Re: I assume. . .
Old 05-17-2005, 12:51 PM   #8 (permalink)
Fantasiesimage
Guest
 
Member GG#:
Posts: n/a
Comments:

IP: 68.103.165.143
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Heck no!! no retouching...I love the texture!!
Don.
 
 
Re: Poster Size Images
Old 05-17-2005, 01:39 PM   #9 (permalink)
Lifetime Photographer

 
craigh's Avatar
 
Join Date: Jul 2003
Member GG#: 36300
Location: Fort Myers
Posts: 155
Comments: 0

craigh is offline IP: 68.201.18.205
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

This is a very beautiful image Don! I LOVE the texture brought out by the lighting. The word you are going to learn is "interpolate" to make this a poster. If you have photoshop, simply go into the size section of the edit menue and change the dpi to about 300 and change the size to the final desired size. Also.. have lunch ready and pray that you have enough RAM!!!

-Craig
  View Public Profile Send a private message to craigh Visit craigh's homepage! Find More Posts by craigh
 
Re: Poster Size Images
Old 05-17-2005, 02:03 PM   #10 (permalink)
Fantasiesimage
Guest
 
Member GG#:
Posts: n/a
Comments:

IP: 68.103.165.143
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote

Okay I tried it to Scott Kelbys Method of resizing percentage of 110% created an action with a short cut key..this increased the image 10% each time...until I got the size I wanted...looks great!!! then I just cropped it to 24"x30" I set the DPI at 150 and yes it did suck up most of my RAM.... the lady Im doing it for is really excited because our local print shop is only charging her 27.50 for a best quality print.
Thanks everyone!!
Don.
 
 
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Posting images from Portfolio Problems!!!! R_Fredrick_Smith Main Community Forum 1 12-10-2006 02:08 AM
Best size to upload images Sindy Tech Talk Forum 3 07-17-2006 05:37 PM
Answer to question on sensor size vs crop factor Brad Tech Talk Forum 17 01-02-2006 10:40 PM
Images Shot Are Models Property Since When? prokop Main Community Forum 20 09-20-2005 10:59 PM
Getting images the same size in PS Austin Tech Talk Forum 2 12-20-2003 11:31 AM

Sponsors


New To Site? Need Help? Photographer & Model Links
All times are GMT -5. The time now is 12:22 PM.

© 1999-2017 Garage Glamour™




Search Engine Friendly URLs by vBSEO 3.2.0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93