Re: [Gimp-user] Increasing DPI of image

2008-11-18 Thread Sven Neumann
Hi,

On Tue, 2008-11-18 at 09:40 +1030, David Gowers wrote:

 Well, you could create a script which only requires you to specify
 target DPI, and it would then read the current DPI, calculate the
 scaling factor from that vs target DPI, scale the image, and finally
 set the DPI.

You could as well go to the Scale dialog, set the desired print
resolution and the desired print size in physical units and click OK.


Sven


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[Gimp-user] Increasing DPI of image

2008-11-17 Thread Dotan Cohen
Can Gimp increase the DPI of a PSD file without affecting the physical
dimensions of the image? We have a wedding invitation in PSD that is
72 DPI and the printer needs 300 DPI. Thanks in advance.

-- 
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
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Re: [Gimp-user] Increasing DPI of image

2008-11-17 Thread David Gowers
Hi,

2008/11/17 Dotan Cohen [EMAIL PROTECTED]:
 Can Gimp increase the DPI of a PSD file without affecting the physical
 dimensions of the image? We have a wedding invitation in PSD that is
 72 DPI and the printer needs 300 DPI. Thanks in advance.
You need to scale your image up to 300/72 (~416.6%) of it's current
size as well as setting DPI to 300.

To understand why, you need to realize that your original question is
like asking 'How can I make this small while keeping it big?' -- DPI
is literally  how many pixels are printed per inch. Less pixels in the
source image == less physical size.

David
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Re: [Gimp-user] Increasing DPI of image

2008-11-17 Thread Dotan Cohen
2008/11/17 David Gowers [EMAIL PROTECTED]:
 Hi,

 2008/11/17 Dotan Cohen [EMAIL PROTECTED]:
 Can Gimp increase the DPI of a PSD file without affecting the physical
 dimensions of the image? We have a wedding invitation in PSD that is
 72 DPI and the printer needs 300 DPI. Thanks in advance.
 You need to scale your image up to 300/72 (~416.6%) of it's current
 size as well as setting DPI to 300.

 To understand why, you need to realize that your original question is
 like asking 'How can I make this small while keeping it big?' -- DPI
 is literally  how many pixels are printed per inch. Less pixels in the
 source image == less physical size.

 David


That is actually what I had done, David, however I figured that it was
worth asking if there is a better way in Gimp. Lots of people smarter
than myself have worked on Gimp, and I should imagine that my
situation is not unique.

Thanks!

-- 
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת

ä-ö-ü-ß-Ä-Ö-Ü
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Re: [Gimp-user] Increasing DPI of image

2008-11-17 Thread David Gowers
Hi,

On Tue, Nov 18, 2008 at 1:24 AM, Dotan Cohen [EMAIL PROTECTED] wrote:
 2008/11/17 David Gowers [EMAIL PROTECTED]:
 That is actually what I had done, David, however I figured that it was
 worth asking if there is a better way in Gimp. Lots of people smarter
Well, you could create a script which only requires you to specify
target DPI, and it would then read the current DPI, calculate the
scaling factor from that vs target DPI, scale the image, and finally
set the DPI.

gimp-image-(set|get)-resolution,
gimp-image-scale (or scale-full) would be the PDB calls you'd need for this.

David
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Re: [Gimp-user] Increasing DPI of image

2008-11-17 Thread Dotan Cohen
2008/11/18 David Gowers [EMAIL PROTECTED]:
 Hi,

 On Tue, Nov 18, 2008 at 1:24 AM, Dotan Cohen [EMAIL PROTECTED] wrote:
 2008/11/17 David Gowers [EMAIL PROTECTED]:
 That is actually what I had done, David, however I figured that it was
 worth asking if there is a better way in Gimp. Lots of people smarter
 Well, you could create a script which only requires you to specify
 target DPI, and it would then read the current DPI, calculate the
 scaling factor from that vs target DPI, scale the image, and finally
 set the DPI.

 gimp-image-(set|get)-resolution,
 gimp-image-scale (or scale-full) would be the PDB calls you'd need for this.


Thanks. I'm only working on one image, but it is good to know for the
future if I run into this again.

-- 
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il
א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת

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