• Adobe Photoshop

  72 pixels to 300 pixels with a twist

  Posted by Rufus Napkin on September 17, 2005 at 2:47 am

  I have a 78 by 56 inch project at 72 pixels (several layers). Before taking it to the printers I need to make one 5X7 jpg, and one 24X36 jpg, both out of this original. Both need to be 300 pixels.

  How do I do this WITHOUT compromising the visual quality of the original?

  Thanks!

  Richard Harrington replied 20 years, 7 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Richard Harrington

  September 17, 2005 at 3:36 am

  78 inch X 72 ppi = 5616 total pixels
  56 inch X 72 ppi = 4032 total pixels

  Just use Image Size Comman

  The first

  5 X 7 at 300 dpi means 1500 X 2100 total pixels

  Not a problem

  the second size

  24 X 36 at 300 ppi = 7200 X 10800

  Which means: “WITHOUT compromising the visual quality of the original?”

  You’re screwed.. you can’t up res without losing something…

  Also

  The Aspect ratio of your original (width divided by height) is approximately 1.4

  What you are aasking for is .72 and .66 respectively

  Also.. can’t see why your printer would ask for a JPEG… not a professional output format for that sort of thing…

  The short answer you have a lack of resolution compounded by a mismatch of ratios, file formats, and a few other things.

  Richard M. Harrington, PMP

  Author: Photoshop CS for Nonlinear Editors
  Co-Author Final Cut Pro on the Spot, After Effects on the Spot, Broadcast Graphics on the Spot, and After Effects @ Work
  Check out the new DVD: Photoshop CS: Essentials for Digital Video from http://www.photoshopforvideo.com

  edit – produce – direct –
• 

  Rufus Napkin

  September 20, 2005 at 4:52 am

  Richard,

  Thank you for taking the time to explain all this. You are the best. The original’s composite was scanned at 72 – ergo the end result. Based on your conclusion with the bigger print I will try using Genuine Fractals to enlarge (probably X 2), see how it looks.

  Thanks again.

  R
• 

  Richard Harrington

  September 30, 2005 at 6:22 pm

  Good luck… thanks for closing loop

  Richard M. Harrington, PMP

  Author: Photoshop CS for Nonlinear Editors
  Co-Author Final Cut Pro on the Spot, After Effects on the Spot, Broadcast Graphics on the Spot, and After Effects @ Work
  Check out the new DVD: Photoshop CS: Essentials for Digital Video from http://www.photoshopforvideo.com

  edit – produce – direct –

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