GNOME.org
 

[Gimp-user] Sinc (Lanczos3) Option

Thanks, everyone, for your help with this issue. I’m working with a jpeg
that is 450x568 pixels @ 72 ppi/4.7x5.9”. I would like the dimensions to be
2.5” x 5.9”. When I resize it without maintaining the aspect ratio (so I
can make it longer than that would allow), you can tell that the image has
been stretched and it doesn’t look right (which is what I meant by
“distorted.”)

Maybe it’s not possible to make an image longer in this way without giving
it that fun house mirror look, but I could have sworn I read online (maybe
from the same guy who recommended gimp 2.4?) that it’s better to make a
smaller image larger than to try to make a larger image smaller.

That seemed counterintuitive to me as, like Liam mentioned, I’d be asking
the image to invent detail that isn’t already present. Was my hunch
correct? I apologize if these are kindergarten questions. As you may have
guessed, I am not of the IT or graphic design world and am just stumbling
around with the basics at the moment. Just got a book called Beginning GIMP
that I’ll be reading soon.

I do not have Linux.

There is another version of this image I can purchase that is larger
(1200x1514 px @ 300 ppi). Should I just buy this and shrink it? It's a bit
spendy, but maybe that would be a lot easier? Or should I try to get GIMP
2.8 and see if by some miracle I can make my smaller image bigger without
sacrificing quality?

Thanks again!


On Mon, Aug 6, 2018 at 5:00 AM, <gimp-user-list-request gnome org> wrote:


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Today's Topics:

   1. Re:  MessengerPro for LinuxMint v19.0 Mate...
      (Alexandre Prokoudine)
   2.  Sinc (Lanczos3) Option (Lisa D.)
   3. Re:  Sinc (Lanczos3) Option] (Ken Moffat)
   4. Re:  Sinc (Lanczos3) Option (Liam R E Quin)
   5. Re:  Sinc (Lanczos3) Option (Jernej Simon?i?)
   6. Re:  Sinc (Lanczos3) Option (Liam R E Quin)


----------------------------------------------------------------------

Message: 1
Date: Sun, 5 Aug 2018 15:57:21 +0300
From: Alexandre Prokoudine <alexandre prokoudine gmail com>
To: GIMP-user-list <gimp-user-list gnome org>
Subject: Re: [Gimp-user] MessengerPro for LinuxMint v19.0 Mate...
Message-ID:
        <CAFjkzc3ee__4hn-JHcq83h8eMuKBt7g-sMwaA4Gn1BvoJt3uKA@mail.gmail.
com>
Content-Type: text/plain; charset="UTF-8"

??, 5 ???. 2018 ?., 7:39 zed:


Using LinuxMint v19 Mate

Could not find a version of Gemini for Ubuntu v18.04 Bionic Beaver, so I
tried to install version for v16.04 Xenial
(MessengerPro_273.3.4227-xenial_amd64.deb) but that requires
libdouble-conversion1v5.  Linux Mint has
libdouble-conversion1v2.01-4ubuntu.

Will there be a version issued for Ubuntu 18.04, please?  If not, am I
safe to download and install libdouble-conversionv1v5 without it
overwriting the present version



Wrong list, mate :) This is GNU Inage Manipulation Program, not much
messaging happening in GIMP.

Alex


------------------------------

Message: 2
Date: Sun, 5 Aug 2018 11:13:01 -0700
From: "Lisa D." <stellabella242 gmail com>
To: gimp-user-list gnome org
Subject: [Gimp-user] Sinc (Lanczos3) Option
Message-ID:
        <CAP9WVObpbp2EFAayrR3WUVsG-z-XMYS8QSuSELxPWssnTkkt5A@mail.
gmail.com>
Content-Type: text/plain; charset="UTF-8"

Hi! I would like to stretch/resize an image without distorting it. I
downloaded GIMP 2.10.4 but was not able to do this with this version of
GIMP. After a few google searches, I found an article stating that you need
GIMP 2.4 to do this because you need to use the ?Sinc (Lanczos3)? option
under Quality>Interpolation in the Scale Image dialog. I checked the
version I have and, lo and behold, 2.10.4 does not seem to have this
option.

So, I would love to get my hands on GIMP 2.4, but it seems to only be
available now via third party sites that seem wholly unaffiliated with gimp
and, to be honest, look a little hinky to me. Does anyone know of a site
like this that is, in fact, safe and trustworthy? Or another way to get
2.4? It doesn't seem to be available on gimp.org. Please let me know if
you
have a moment and I'll try to pass it forward when get more gimp skills
under my belt. I have Windows 10, in case it helps to know that.

Thanks in advance!


------------------------------

Message: 3
Date: Sun, 5 Aug 2018 22:44:36 +0100
From: Ken Moffat <zarniwhoop ntlworld com>
To: gimp-user-list gnome org
Subject: Re: [Gimp-user] Sinc (Lanczos3) Option]
Message-ID: <20180805214436.GA22701@milliways.localdomain>
Content-Type: text/plain; charset=utf-8

Whoops, managed to reply to sender instead of replying to the list.

----- Forwarded message from Ken Moffat <zarniwhoop ntlworld com> -----

Date: Sun, 5 Aug 2018 20:20:51 +0100
From: Ken Moffat <zarniwhoop ntlworld com>
To: "Lisa D." <stellabella242 gmail com>
Subject: Re: [Gimp-user] Sinc (Lanczos3) Option
User-Agent: Mutt/1.10.1 (2018-07-13)
Message-ID: <20180805192051.GA18646@milliways.localdomain>

On Sun, Aug 05, 2018 at 11:13:01AM -0700, Lisa D. via gimp-user-list wrote:

Hi! I would like to stretch/resize an image without distorting it. I
downloaded GIMP 2.10.4 but was not able to do this with this version of
GIMP. After a few google searches, I found an article stating that you

need

GIMP 2.4 to do this because you need to use the ?Sinc (Lanczos3)? option
under Quality>Interpolation in the Scale Image dialog. I checked the
version I have and, lo and behold, 2.10.4 does not seem to have this
option.

So, I would love to get my hands on GIMP 2.4, but it seems to only be
available now via third party sites that seem wholly unaffiliated with

gimp

and, to be honest, look a little hinky to me. Does anyone know of a site
like this that is, in fact, safe and trustworthy? Or another way to get
2.4? It doesn't seem to be available on gimp.org. Please let me know if

you

have a moment and I'll try to pass it forward when get more gimp skills
under my belt. I have Windows 10, in case it helps to know that.

Thanks in advance!


I suspect you have been misled by an old article : 2.4 is now
perhaps best described as 'antique'.  I think that this option was
in 2.8, but was dropped in 2.10 : since nobody likes losing quality,
I guess that the developers think the available options are good
enough.  A lot of the internal details changed in 2.10 (more use of
gegl).

But your terminology disturbs me - if you scale up an image, it
should not be distorted (image | scale image) unless the original
image is a jpeg and artifacts appear.  But stretching an image
implies distorting it to make things relatively wider (or higher).

Maybe I've misunderstood, but I suggest you take an example image in
2.10.4, scale it to your desired size with the various available
options : do this several times, starting from the original each
time, use a different option and save to a separate xcf file (so -A,
-B or whatever : I don't have gimp on the machine I'm replying
from), then export a png from each and compare them.

If there is indeed a problem, then consider trying the latest 2.8
version *probably 2.8.22) where that option should be available -
use that, again create a png, compare to the results from 2.10.4.
If that turns out to be equally bad, it's probably either artifacts
in the original, or excessive scaling.  But if 2.8 is better then
please raise a bug.

Many things changed in 2.9 and a few have changed in 2.10.
Sometimes we need to modify our process to get the results we want.

?en
--
           Entropy not found, thump keyboard to continue


----- End forwarded message -----

--
           Entropy not found, thump keyboard to continue



------------------------------

Message: 4
Date: Mon, 06 Aug 2018 01:59:46 -0400
From: Liam R E Quin <liam holoweb net>
To: "Lisa D." <stellabella242 gmail com>, gimp-user-list gnome org
Subject: Re: [Gimp-user] Sinc (Lanczos3) Option
Message-ID:
        <670ff37010fcf53823d400369ef0baad8687afd4 camel holoweb net>
Content-Type: text/plain; charset="UTF-8"

On Sun, 2018-08-05 at 11:13 -0700, Lisa D. via gimp-user-list wrote:

Hi! I would like to stretch/resize an image without distorting it.


This depends on exactly what you mean by distorting it. By default GIMP
will retain the aspect ratio of the original ratio, but maybe that's
not what you meant?


I found an article stating that
you need
GIMP 2.4 to do this because you need to use the ?Sinc (Lanczos3)?
option


GIMP 2.10 has LoHalo and NoHalo instead. For enlarging an image,
though, the third-party Resynthesizer plugin might do a better job.


Does anyone know of a
site
like this that is, in fact, safe and trustworthy? Or another way to
get
2.4?


For which Linux distribution and which CPU architecture?


I have Windows 10, in case it helps to know that.


Oh. No, that doesn't help.

It might be that archive.org has saved a copy, but i doubt it.

In any case, it's unlikely that gimp 2.4 with lanczos scaling will do
better than gimp 2.10 in practice. I'd need to see what you're doing
inmuch more detail to be sure or to be able to suggest a better
approach.

Remember that when yuo try to make an image larger you are asking the
computer to invent detail that isn't already present.

Liam (slave ankh)





------------------------------

Message: 5
Date: Mon, 6 Aug 2018 09:08:12 +0200
From: Jernej Simon?i? <jernej|s-ng eternallybored org>
To: gimp-user-list gnome org
Subject: Re: [Gimp-user] Sinc (Lanczos3) Option
Message-ID: <u1utvugc8m47 uivcxp32bpkj dlg 40tude net>
Content-Type: text/plain; charset="utf-7"

On Mon, 06 Aug 2018 01:59:46 -0400, Liam R E Quin wrote:


It might be that archive.org has saved a copy, but i doubt it.


GIMP 2.4 for Windows is available here:
<https:??download.gimp.org?mirror?pub?gimp?v2.4?windows?>

--
< Jernej Simon?i? ><><><><>< http:??eternallybored.org? >



------------------------------

Message: 6
Date: Mon, 06 Aug 2018 04:20:39 -0400
From: Liam R E Quin <liam holoweb net>
To: Jernej Simon?i? <jernej|s-ng eternallybored org>,
        gimp-user-list gnome org
Subject: Re: [Gimp-user] Sinc (Lanczos3) Option
Message-ID:
        <c159f9e0d89dc67b53a386781051f821345f15e8 camel holoweb net>
Content-Type: text/plain; charset="UTF-8"

On Mon, 2018-08-06 at 09:08 +0200, Jernej Simon?i? wrote:

On Mon, 06 Aug 2018 01:59:46 -0400, Liam R E Quin wrote:


It might be that archive.org has saved a copy, but i doubt it.


GIMP 2.4 for Windows is available here:
<https://download.gimp.org/mirror/pub/gimp/v2.4/windows/>


i'd be interested to know what sort of image does better with that than
with 2.10 and why.

Liam (slave ankh)


--
Liam Quin - web slave for https://www.fromoldbooks.org/

Click here to have the slave beaten.



------------------------------

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