Archived posting to the Leica Users Group, 2002/10/27

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Subject: Re: web sizing images (was RE: [Leica] Kodak Royal Gold 100)
From: "J. Gilbert Plantinga" <gilplant@hvc.rr.com>
Date: Sun, 27 Oct 2002 09:35:33 -0500

The effects of unsharp masking are dependent on the resolution of the 
image - the 'radius' setting is a discrete number of pixels - so any 
USM should be applied only after resizing the image to it's final 
dimensions. Try it out!

Gilbert

On Sunday, October 27, 2002, at 09:29  AM, Nathan Wajsman wrote:

> Why is that? To me it makes intuitive sense to do all the manipulation 
> (including unsharp masking) on the big, 16-bit image, rather than on 
> the downsized version. Maybe there is a good reason, I am curious to 
> hear it.
>
> Nathan
>
> J. Gilbert Plantinga wrote:
>> Actually, I find that it's almost always a good idea to do some 
>> unsharp masking (~ 85%,  0.4, 0) after resizing but   before saving 
>> it as a jpeg (File/Save for Web... is the best route because it 
>> optimizes and shows a preview). I do NOT sharpen the original 
>> photoshop file before resizing.
>> Gilbert
>> On Sunday, October 27, 2002, at 01:20  AM, Nathan Wajsman wrote:
>>> They key is that the initial scan and all subsequent Photoshop work 
>>> is carried out at the highest resolution; the reduction to web size 
>>> comes only after all that has been done.

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Replies: Reply from Nathan Wajsman <wajsman@webshuttle.ch> (Re: web sizing images (was RE: [Leica] Kodak Royal Gold 100))