Image size and sharpening

CA
Posted By
Colin Ackerman
Jul 7, 2004
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209
Replies
5
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Closed
I am new to Photoshop, so please excuse me if this is a very basic question. I like to produce large prints (A3+) so therefore I scan images at the maximum resolution of my scanner (5400 dpi). When I view the resultant images in Photoshop they obviously look HUGE. When I zoom out I can see the complete photo. So my question is this:- What is the best zoom setting to view the image at in order to be certain that I am not overdoing adjustments
i.e. not oversharpening for example. This seems like a question I should
know the answer to but I can’t seem to get my head around it. Any help or advice gratefully received

—
Regards Colin Ackerman
Check out my Web site at www.aboveusthewaves.com
Now available my Dive Trip report to Dominica ‘Nature Island of the Caribbean’ – May 2004
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N
nomail
Jul 7, 2004
Colin Ackerman wrote:

I am new to Photoshop, so please excuse me if this is a very basic question. I like to produce large prints (A3+) so therefore I scan images at the maximum resolution of my scanner (5400 dpi). When I view the resultant images in Photoshop they obviously look HUGE. When I zoom out I can see the complete photo. So my question is this:- What is the best zoom setting to view the image at in order to be certain that I am not overdoing adjustments
i.e. not oversharpening for example. This seems like a question I should
know the answer to but I can’t seem to get my head around it. Any help or advice gratefully received

If you print at 300 dpi, it is often suggested to view at 50% to get a reasonable estimate of what sharpening would do for the print.

—
Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer http://www.johanfoto.nl/
P
pcourterelle
Jul 7, 2004
Colin: If it is not possible to view at 100% then I’ve found 60% or some factor thereof to work best (ie 30%, 15% ect). However, even at 60% the sharpening may appear exaggerated and the image somewhat bitmapped whereas 50% tends to de-emphasize sharpening and be somewhat misleading. This is where experience and religion meet: you need to clearly understand the correction requirements for the medium in which your images will be reproduced and to have faith that the your corrections will work given your experience and irregardless of what the monitor displays. When in doubt, test.

Hope this helps.

Phil Courterelle
Calgary

in article ccgab7$p6f$, Colin Ackerman at
wrote on 7/7/04 1:56 AM:

I am new to Photoshop, so please excuse me if this is a very basic question. I like to produce large prints (A3+) so therefore I scan images at the maximum resolution of my scanner (5400 dpi). When I view the resultant images in Photoshop they obviously look HUGE. When I zoom out I can see the complete photo. So my question is this:- What is the best zoom setting to view the image at in order to be certain that I am not overdoing adjustments
i.e. not oversharpening for example. This seems like a question I should
know the answer to but I can’t seem to get my head around it. Any help or advice gratefully received

—
Regards Colin Ackerman
Check out my Web site at www.aboveusthewaves.com
Now available my Dive Trip report to Dominica ‘Nature Island of the Caribbean’ – May 2004

W
Waldo
Jul 7, 2004
You can have more views of one image with different zoom factors. Depending on the version of Photoshop you have, it may be under View->New View or somewhere in the Window menu.

Waldo
I
innout
Jul 7, 2004
Not sure if your zooming question is about sharpening only, or about adjustments in general.

I zoom in and out depending on the kind of adjustments. For example, zooming to fit the window with the palettes tabbed out gives me a complete view of the composition, tonality and color balance. For sharpening, I zoom at 100%, sometimes up to 1000% to see the halos’ widths in pixel counts. When editing a high resolution image, it pays to get close to see the details. After all, that’s why you scanned at 5400 dpi to begin with.

Knowing how to use keyboard shortcuts to zoom quickly makes it easy.

Colin Ackerman wrote:
I am new to Photoshop, so please excuse me if this is a very basic question. I like to produce large prints (A3+) so therefore I scan images at the maximum resolution of my scanner (5400 dpi). When I view the resultant images in Photoshop they obviously look HUGE. When I zoom out I can see the complete photo. So my question is this:- What is the best zoom setting to view the image at in order to be certain that I am not overdoing adjustments
i.e. not oversharpening for example. This seems like a question I should
know the answer to but I can’t seem to get my head around it. Any help or advice gratefully received

—
Regards Colin Ackerman
Check out my Web site at www.aboveusthewaves.com
Now available my Dive Trip report to Dominica ‘Nature Island of the Caribbean’ – May 2004
BV
Bart van der Wolf
Jul 10, 2004
"Colin Ackerman" wrote in message
SNIP
So my question is this:- What is the best zoom setting to view the image at in order to be certain that I am not overdoing adjustments
i.e. not oversharpening for example.

Only 100% zoom will show an accurate impression (assuming pre-sampling to final output size) of things like edge halo. If preparing for print, do realize that a printer uses a much denser pixel placement, so you may need to apply more sharpening than you would for screen output.

Bart

How to Master Sharpening in Photoshop

Give your photos a professional finish with sharpening in Photoshop. Learn to enhance details, create contrast, and prepare your images for print, web, and social media.

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