[Digikam-users] Batch tools, unsharp

[Olivier Six]

Hi everyone,

I already asked about this problem, but got no answer. I will try
again to explain what my problem is :

The "tools - batch process", if I go to the "filter", and "unsharp",
in the options, there are 4 settings that I can enter :

Radius, Deviation, Percent, Threshold

In the Imagemagick manuel, it says :
threshold: The threshold, as a fraction of QuantumRange, needed to
apply the difference amount (default 0.05).
(ref :
http://www.imagemagick.org/script/command-line-options.php?#unsharp)

The problem is that I can only use integers as setting.

It appears the same problem applies for the other parameters.

In the page http://redskiesatnight.com/Articles/IMsharpen/
I can read :

<quote>
A typical call to convert might look something like the following:
$ convert ... -unsharp 1.5x1.2+1.0+0.10 <input file> <output file>
</quote>

Obviously all parameters could be «NOT intergers», but in the
batch-process, I can enter ONLY integers.

Does anyone have an idea ? Is it a «bug» in Imagemagick, or in Digikam?

Well, even in case of no answer, I want to express my gratitude to the 
team who gives us Digikam, which is a REAL tool. I use it day after 
day, and I enjoy it.

> Hi, all.
> 
> I am using Digikam (I've been using Digikam for about 6 months) on
> Ubuntu (Gutsy), version is 0.92, and imagemagick is version (I
> think) 6.2.4.5
> 
> First, I am suprised that there are TWO versions for the «unsharp
> mask» function in Digikam.
> 
> From the Image Editor -> Enhance -> sharpen -> Unsharp mask, where
> I find a «a la Gimp» interface (three settings, Radius, Amount,
> Threshold, and from Tools -> Batch process -> filter images
> ->unsharp I get the «Imagemagick Style» version, with different
> settings : Radius, Deviation, Percent, and Threshold.
> 
> The Gimp version works OK. But as I would like to process my photos
> by large numbers, I want to use the Batch function. And there, I
> have 2 problems :
> 
> - the settings don't answer as described in the different pages I
> have consulted. Where people talk from 0.05 in threshold, or 1.2 in
> radius, etc., here, from Digikam, I am unable to enter any
> parameter that is not an integer
> 
> - whatever setting I use, I don't get any result : target image is
> the same as the original image.
> 
> 
> Is there anything that I should know, or anything I do wrong ?
> 
> While I am here : thank you for this great software.