On 01/21/2016 11:57 PM, boydy33 wrote:

Hi there,
Hope you can help me with this as I’ve tried everything! All I am trying to do is scale a large .EPS logo which is 1.2Mb and default imports into Gimp 2.8.14 at 100dpi?, Width 826 and Height 1170 with no Anti-Aliasing, down to a logo of around 28mm high without losing too much image quality. What I get using the standard scale command in Gimp is a colour degradation and very fuzzy logo outlines.

I’ve been ‘trying’ to use Liquid Rescale, the gimp plugin, but it comes back with two error boxes…

[ ... ]

Any suggestions? I don’t have to use the LR plugin but from what I’ve read it seems the only way to do this well with Gimp.

Hey,

Liquid Rescale is a tool for 'stretching' images to a new aspect ratio (i.e. making them wider but not taller), without affecting selected elements of the image or creating visible seams. It can also be used to remove parts of an image without visible distortion. I don't think it's the best option for radical re-scaling with minimum distortion.

I would try the Script Fu 'Step Resize' tool for that. But the GIMP is probably not the right tool for the job at hand.

The EPS file format is normally a vector file, that is, more like a CAD drawing than a digital photograph. From Wikipdeia:

"An EPS file is a stream of generic PostScript printing commands."

EPS files also (usually) have thumbnail images embedded in them; again per Wikipedia: "EPS files also frequently include a preview picture of the content, for on-screen display."

A logo that is a 1.2 MB EPS file probably has a /big/ preview image; vector graphic files are normally a tiny fraction of the size of an equivalent bitmap image file. But I don't think that's relevant to solving your problem.

The first thing I would try is opening the EPS file in a vector graphics editor like Inkscape. This /should/ enable you to export bitmap copies of the logo at any scale, with the best resolution possible for the size in question. This flexibility is why logos are normally created as vector files; the same vector graphic source file can be used to make matchbook covers and billboards.

https://inkscape.org/en/download/mac-os/

http://graphicssoft.about.com/od/inkscape/ss/Export.htm

Hopefully this will get the job done.

:o)

Any help much appreciated.

By the way, I’d prefer someone in my own time zone in Eastern Australia (GMT + 10 hours) if possible.

Cheers

For scaling down vector images, use Inkscape. Otherwise, if you still use GIMP, make sure that you import the image at 300dpi and resize from that - but for a better visual result, I highly suggest using Inkscape

Dott. David Berti
IT Consultant, Designer, Author
Information Architecture Specialist
Ainó, UX BookClub Perugia, Bembughi
Cell: (+39) 347-518-66-24
CV: https://www.linkedin.com/in/davidberti
www.davidberti.it | www.davidberti.eu
www.aino-consulting.it | www.aino-consulting.com


> -----Original Message-----
> From: admin@pilobilus.net
> Sent: Sat, 23 Jan 2016 15:56:38 -0500
> To: gimp-user-list@gnome.org
> Subject: Re: [Gimp-user] how to scale down image without quality loss
> 
> On 01/21/2016 11:57 PM, boydy33 wrote:
>> Hi there,
>> Hope you can help me with this as I’ve tried everything!
>> All I am trying to do is scale a large .EPS logo which is 1.2Mb and
>> default
>> imports into Gimp 2.8.14 at 100dpi?, Width 826 and Height 1170 with no
>> Anti-Aliasing, down to a logo of around 28mm high without losing too
>> much image
>> quality.  What I get using the standard scale command in Gimp is a
>> colour
>> degradation and very fuzzy logo outlines.
>> 
>> I’ve been ‘trying’ to use Liquid Rescale, the gimp plugin, but it comes
>> back
>> with two error boxes…
> 
> [ ... ]
> 
>> Any suggestions?  I don’t have to use the LR plugin but from what I’ve
>> read it
>> seems the only way to do this well with Gimp.
> 
> Hey,
> 
> Liquid Rescale is a tool for 'stretching' images to a new aspect
> ratio (i.e. making them wider but not taller), without affecting
> selected elements of the image or creating visible seams.  It can
> also be used to remove parts of an image without visible distortion.
>  I don't think it's the best option for radical re-scaling with
> minimum distortion.
> 
> I would try the Script Fu 'Step Resize' tool for that.  But the GIMP
> is probably not the right tool for the job at hand.
> 
> The EPS file format is normally a vector file, that is, more like a
> CAD drawing than a digital photograph.  From Wikipdeia:
> 
> "An EPS file is a stream of generic PostScript printing commands."
> 
> EPS files also (usually) have thumbnail images embedded in them;
> again per Wikipedia:  "EPS files also frequently include a preview
> picture of the content, for on-screen display."
> 
> A logo that is a 1.2 MB EPS file probably has a /big/ preview image;
> vector graphic files are normally a tiny fraction of the size of an
> equivalent bitmap image file.  But I don't think that's relevant to
> solving your problem.
> 
> The first thing I would try is opening the EPS file in a vector
> graphics editor like Inkscape.  This /should/ enable you to export
> bitmap copies of the logo at any scale, with the best resolution
> possible for the size in question.  This flexibility is why logos
> are normally created as vector files; the same vector graphic source
> file can be used to make matchbook covers and billboards.
> 
> https://inkscape.org/en/download/mac-os/
> 
> http://graphicssoft.about.com/od/inkscape/ss/Export.htm
> 
> Hopefully this will get the job done.
> 
> :o)
> 
>> Any help much appreciated.
>> 
>> By the way, I’d prefer someone in my own time zone in Eastern Australia
>> (GMT +
>> 10 hours) if possible.
>> 
>> Cheers
>> 
> 
> _______________________________________________
> gimp-user-list mailing list
> List address:    gimp-user-list@gnome.org
> List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list
> List archives:   https://mail.gnome.org/archives/gimp-user-list

____________________________________________________________
FREE 3D EARTH SCREENSAVER - Watch the Earth right on your desktop!
Check it out at http://www.inbox.com/earth

On 01/21/2016 11:57 PM, boydy33 wrote:

All I am trying to do is scale a large .EPS logo which is 1.2Mb and default imports into Gimp 2.8.14 at 100dpi?, Width 826 and Height 1170 with no Anti-Aliasing, down to a logo of around 28mm high without losing too much image quality.

If you want the image to appear on paper at 28mm high at 100dpi you can calculate the size of the image in pixels using that information.

28mm high at 100dpi works out to 110 pixels. If you are trying to scale an image that is over 800 pixels high you are losing a lot of information. I would suggest you up your dpi value to at least 300 for such a small image.

Cheers!

Kevin.

http://www.ve3syb.ca/           |"Nerds make the shiny things that distract
Owner of Elecraft K2 #2172      | the mouth-breathers, and that's why we're
                                 | powerful!"
#include  |             --Chris Hardwick