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List:       kde-artists
Subject:    K-ARTIST: Re: Few miscellaneous suggestions
From:       Brad Hards <bhards () bigpond ! net ! au>
Date:       2004-07-25 4:06:31
Message-ID: 200407251406.35704.bhards () bigpond ! net ! au
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On Sun, 25 Jul 2004 05:53 am, James Richard Tyrer wrote:
> A simple metric would be to decompose it into three matrices one for each
> color, take the two dimensional FFT of each one.  You can obtain the
> digital equivalent to a volume under each FFT by a scalar addition of all
> of the entries in each FFT result matrix.  So that icons of different sizes
> can be compared, you actually want the average so you should normalize the
> sum by dividing it by the number of scalers summed (the area of the icon in
> square pixels).  Then take the square root of the sum of the squares of
> these three (normalized) scalar sums and you will have a very rough metric
> of the information contained in an icon. Note that for a first example, it
> should be obvious that a gray square would have a value of 0 indicating
> that it had no information.
You are still missing my point that the useability of a desktop is not only a 
function of the information in each icon. The screen doesn't have equal 
importance at all areas - you'd need to apply some form of weighting 
function.

Even at the icon level, you're still incorrect in assuming that something that 
has a wide range of frequencies in each colour is going to be more useable 
than something that has less. That would mean that the more garish an icon, 
the more useable it is! I think that grey'd out icons actually convey 
information to the user, but by the frequency measure, an icon set without 
grey'd out icons would be considered more useable. Further, why do you think 
that root-sum-squares of the per-colour scalar sums is meaningful in general? 
We know that men and women perceive colour differently. So I don't seen even 
a meaningful measure of how useful an icon is (even with some opinion based 
weighting of a FFT of a YUV representation).

Real life test results of various theme options, using the same test tasks 
(with the same apps, same displays, statistically significant test 
population, etc) is objective. Anything less is opinion.

Brad
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