Re: [Gimp-docs] Gimp-2.9.5 - Select border
Thank you Ell, thank you Marco for your help. Julien ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
Re: [Gimp-docs] Gimp-2.9.5 - Select border
On Sat, Mar 18, 2017 at 12:34:37PM -0400, Ell via gimp-docs-list wrote: > > > On 03/18/2017 12:20 PM, Ell wrote: > >... while "smooth" grows the original selection by half > >the radius, shrinks the original selection by half the radius, and > >subtracts the shrunk selection from the expanded one. > > Oops, should just be "radius", not "half the radius". > > -- > Ell Anyway, very well written, Ell! -- Marco Ciampa I know a joke about UDP, but you might not get it. GNU/Linux User #78271 FSFE fellow #364 ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
Re: [Gimp-docs] Gimp-2.9.5 - Select border
On Sun, Mar 19, 2017 at 08:34:41AM +0100, Julien Hardelin wrote: > Hi Marco, > > >On Sat, Mar 11, 2017 at 06:37:14PM +0100, Julien Hardelin wrote: > >>Hello all, > >> > >>Please, what do you get when using select/border? I cann't see any > >>difference between the three options of "Border Style': Hard, Smooth and > >>Feather. > >For the feather style, you do have an alpha layer when you make the > >selection, don't you? > > Yes I have. > > > >For the smooth style, use high values with a rectangular selection to see > >the smooth (round) effect ... > > > >...and re-select the selection to make any change in settings effective. > What do you mean by "re-select the selection"? I mean that if you change style after given the effect you see no changes. You have to re-select the selection with the desired selection/border style and then you can see any difference, but perhaps I am to prosaic in saying this ... sorry > In this example : > https://mon-partage.fr/f/RgBYJtjb/ > I understand what happens : the border command wih feathered option feathers > both borders of the border selection , but this is not visible in the left > image of course. This becomes visible if I Edit/Clear the selection (on the > right). Right! I won't produce any example since the Ell explanation and example is hard to beat! :-) Regards, -- Marco Ciampa I know a joke about UDP, but you might not get it. GNU/Linux User #78271 FSFE fellow #364 ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
Re: [Gimp-docs] Gimp-2.9.5 - Select border
On 03/18/2017 12:20 PM, Ell wrote: ... while "smooth" grows the original selection by half the radius, shrinks the original selection by half the radius, and subtracts the shrunk selection from the expanded one. Oops, should just be "radius", not "half the radius". -- Ell ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
Re: [Gimp-docs] Gimp-2.9.5 - Select border
(Replying to prokoudine's mail because I don't have the original. Please keep me CCed if you need my attention.) On 03/17/2017 06:32 PM, Alexandre Prokoudine wrote: On Sat, Mar 11, 2017 at 8:37 PM, Julien Hardelin wrote: Hello all, Please, what do you get when using select/border? I cann't see any difference between the three options of "Border Style': Hard, Smooth and Feather. The main difference between "smooth" and "hard" is that "smooth" keeps antialiasing, while "hard" doesn't. See [1] for a comparison of the three modes (you might need to zoom in to see the difference between "smooth" and "hard".) Note that "smooth" doesn't add any antialiasing that's not already there -- if the original selection is not antialiased, there should be no, or little, difference from "hard". Don't know if this belongs in the docs, but on a technical level, "hard" uses a threshold to determine the selection's outline (the same outline shown by the marching ants), and produces a fully-selected border around it, while "smooth" grows the original selection by half the radius, shrinks the original selection by half the radius, and subtracts the shrunk selection from the expanded one. "Feathered" does the same things as "hard", but instead of the resulting border being fully selected, it fades outwards. The result is pretty low-quality, though; if you need a feathered border, it's much better to use one of the other modes, and then feather the result. It's there mostly for historic reasons. All in all, "smooth" is what you generally want to use, "hard" might be useful in some cases, and "feathered" is for when you're feeling nostalgic (I actually think photoshop does something similar to "feathered", or at least it used to, so you can also chalk it as a "compatibility" feature :) [1] https://bug764614.bugzilla-attachments.gnome.org/attachment.cgi?id=325383 -- Ell ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
Re: [Gimp-docs] Gimp-2.9.5 - Select border
Hi Marco, On Sat, Mar 11, 2017 at 06:37:14PM +0100, Julien Hardelin wrote: Hello all, Please, what do you get when using select/border? I cann't see any difference between the three options of "Border Style': Hard, Smooth and Feather. For the feather style, you do have an alpha layer when you make the selection, don't you? Yes I have. For the smooth style, use high values with a rectangular selection to see the smooth (round) effect ... ...and re-select the selection to make any change in settings effective. What do you mean by "re-select the selection"? In this example : https://mon-partage.fr/f/RgBYJtjb/ I understand what happens : the border command wih feathered option feathers both borders of the border selection , but this is not visible in the left image of course. This becomes visible if I Edit/Clear the selection (on the right). Could you post your example? Regards, Julien ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
Re: [Gimp-docs] Gimp-2.9.5 - Select border
On Sat, Mar 11, 2017 at 06:37:14PM +0100, Julien Hardelin wrote: > Hello all, > > Please, what do you get when using select/border? I cann't see any > difference between the three options of "Border Style': Hard, Smooth and > Feather. For the feather style, you do have an alpha layer when you make the selection, don't you? For the smooth style, use high values with a rectangular selection to see the smooth (round) effect ... ...and re-select the selection to make any change in settings effective. Regards, -- Marco Ciampa I know a joke about UDP, but you might not get it. GNU/Linux User #78271 FSFE fellow #364 ___ gimp-docs-list mailing list gimp-docs-list@gnome.org https://mail.gnome.org/mailman/listinfo/gimp-docs-list
