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72 pixels to 300 pixels with a twist

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rufus napkin
72 pixels to 300 pixels with a twist
on Sep 17, 2005 at 2:47:14 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!


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Richard Harrington
Re: 72 pixels to 300 pixels with a twist
on Sep 17, 2005 at 3:36:01 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 -


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rufus napkin
Re: 72 pixels to 300 pixels with a twist
on Sep 20, 2005 at 4:52:02 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


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Richard Harrington
Re: 72 pixels to 300 pixels with a twist
on Sep 30, 2005 at 6:22:29 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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