On 30/06/15 14:57, Dave wrote:
> I only ever seen one of three options :
> Red, probably focused sharp
> Blue, less focused but still alright
> Neither red nor blue, totally out of focus.
>

I think that the discrimination is somewhat related to the average 
details level in the image, so that if your image is uniformly blurred 
(or sharp) the results are quite strange. When you have very distinct 
sharp and blurred area it works ok:

http://i.imgur.com/NzhFuI3.png

(Notice that this is the screenshot of a preview, the real image of the 
flower is quite sharper of what is shown here).

In my opinion is just a way to have an idea on where the sharpest zone 
is, if it exists. I would still prefer a way to have two images side by 
side to check, like in the lighttable function of digikam...

Romano


-- 
Romano Giannetti, Ph.D, Electronic Engineer, Professor
http://www.rgtti.com/

-- 
--
Romano Giannetti
http://www.rgtti.com/

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