With any image processing it is always recommended that sharpening is the last 
thing you do. Any adjustments after that affect the perception of sharpness 
that the eye sees.
 
Sent from my BlackBerry® wireless handheld

-----Original Message-----
From: Felix Hagemann <[email protected]>
Sender: [email protected]
Date: Tue, 11 Sep 2012 14:49:42 
To: <[email protected]>
Reply-To: [email protected]
Subject: Re: [hugin-ptx] when to sharpen?

On 11 September 2012 08:54, TvE  wrote:
> This probably an FAQ, but I couldn't find an answer: when do you sharpen
> spherical panoramas? Before compositing (i.e. sharpen the original images)
> or afterwards, and if so, using what type of projection (I need to output
> equirectangular in the end)?

I've been experimenting with the projection to do the sharpening on
quite some time ago. I was mainly trying to sort out if there is a
practical difference between:
(i) Sharpening the final equirectangular. In theory this should be a
bad idea due to the "messed" up neighbourhoods near the poles.
(ii) Create six rectilinear 90x90 images, sharpen those and reassemble
to an equirectangular.

While the difference images showed some very minor differences I was
unable to distinguish the images created by those two methods
visually. I've been sharpening equirects ever since...

Felix

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