On 4 December 2013 19:50, Teo Mazars <[email protected]> wrote:
>> This Gaussian blur slider range doesn't really allow slider selection
>> of
>> small, precise values less than 1, so typing in values is still
>> necessary. A logarithm-type scale might be better than a linear scale
>> as
>> the useful range for blur necessarily is large, and the larger the
>> image, the larger the useful range.
>
> [...]
>
>> The other gegl_chant_double_ui values are pretty obvious. What does
>> the
>> value "1.5" do?
>
> The "1.5" is the UI exponent you were asking for in Gaussian Blur, 1.0 is 
> linear. If 1.5 is not enough, you may try 2.0 or larger. For the slider step 
> problem, I don't know much about that sorry... I think the new UI values you 
> suggest are good. So please, try some more by tweaking the exponent and you 
> can commit directly to GEGL master those changes, if you want.
>
>>
>> A way to type in values without risking accidentally causing a very
>> large radius operation would be very welcome.
>
> Agreed, I am not sure how to solve that though...
>
>> I wonder what values other people might find useful for Gaussian blur
>> and USM? I have a 10MP camera. Someone with a 30 or 40MP camera
>> probably
>> would need a larger range, which is one reason why user-settable
>> ranges
>> might be a nice feature. Different styles of processing would be
>> another.
>
> I agree too, but this is also an UI problem and I am really not an expert. A 
> reasonable arbitrary UI range + exponent is already a step forward.


What if we can think of a way of hint up values for the UI, but not
constrain the operator values themselves by these values - so that one
could make a 2000-radius gaussian blur, if really needed?
(despite any UI changes themselves to allow suitable ranges depending
on the image size
for certain controls? - (brush radius and gaussian blur come to mind) )



>
> Thank you,
>
> Téo
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