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  • How to make 150 DPI *.jpg with GIMP

    From artrotterdamart@gmail.com@21:1/5 to All on Tue Oct 2 09:35:09 2018
    For new files GIMP can set the x-Resolution and y-Resolution in pixels per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    150 DPI is standard in the on demand printing business

    --- SoupGate-Win32 v1.05
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  • From lisa@21:1/5 to artrotterdamart@gmail.com on Wed Oct 3 11:25:34 2018
    artrotterdamart@gmail.com wrote:

    For new files GIMP can set the x-Resolution and y-Resolution in pixels per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    150 DPI is standard in the on demand printing business

    I would use Irfanview to do this job.
    With cntr-r you get the resize options and one of them is to change
    the DPI resolution.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Christian Steins@21:1/5 to All on Wed Oct 3 14:53:02 2018
    Am 02.10.2018 um 18:35 schrieb artrotterdamart@gmail.com:

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    Hi,
    using "Image->Print Size" you can adjust the DPI without changing the
    pixel size of the image.

    Chris.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From William Unruh@21:1/5 to Christian Steins on Wed Oct 3 13:23:48 2018
    On 2018-10-03, Christian Steins <cs01@quantentunnel.de> wrote:
    Am 02.10.2018 um 18:35 schrieb artrotterdamart@gmail.com:

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    Hi,
    using "Image->Print Size" you can adjust the DPI without changing the
    pixel size of the image.

    That or course also changes the actual size of the picture as well. Ie,
    if you do not mind your picture which was 6x4 in before now being 3x2
    then this would work. However if you want it interpolated so that it is
    still 6x4 at 150dpi rather than 6x4 at 72, then you will need to do
    something else, like use Image ScaleImage.
    Note that sharp edges will no longer be pixel sharp-- they will be
    fuzzed out over about 2 pixels instad ( using cubic spline)
    If sharp edges are important to you, then you could use "none for interpolation. With an expansion of two (72dpi to 144 or even 150) that
    would probably not do too badly. However if you want gradual shading you
    would now get "blocks" of colour 2 pixels wide instead of gradual
    shading.

    Chris.



    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From dale@21:1/5 to artrotterdamart@gmail.com on Wed Feb 13 20:37:38 2019
    On 10/2/2018 12:35 PM, artrotterdamart@gmail.com wrote:
    For new files GIMP can set the x-Resolution and y-Resolution in pixels per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    150 DPI is standard in the on demand printing business


    should be 300 dpi in order to account for Nyquist's Theorem

    the eyes can resolve 150 lpi

    twice the eye, 300 dpi , avoids banding/etc.



    --
    dale - https://www.dalekelly.org/
    Not a professional opinion unless specified.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From William Unruh@21:1/5 to dale on Thu Feb 14 18:53:08 2019
    On 2019-02-14, dale <dale@dalekelly.org> wrote:
    On 10/2/2018 12:35 PM, artrotterdamart@gmail.com wrote:
    For new files GIMP can set the x-Resolution and y-Resolution in pixels per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    No idea what OS you are using, but on linux you could use
    convert
    to convert the pixel rate.



    150 DPI is standard in the on demand printing business


    should be 300 dpi in order to account for Nyquist's Theorem

    the eyes can resolve 150 lpi

    twice the eye, 300 dpi , avoids banding/etc.




    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From dale@21:1/5 to artrotterdamart@gmail.com on Thu Feb 14 19:58:06 2019
    On 10/2/2018 12:35 PM, artrotterdamart@gmail.com wrote:
    For new files GIMP can set the x-Resolution and y-Resolution in pixels per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    cubic interpolation might help some



    150 DPI is standard in the on demand printing business



    --
    dale - https://www.dalekelly.org/
    Not a professional opinion unless specified.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From dale@21:1/5 to dale on Thu Feb 14 20:59:30 2019
    On 2/14/2019 7:58 PM, dale wrote:
    On 10/2/2018 12:35 PM, artrotterdamart@gmail.com wrote:
    For new files GIMP can set the x-Resolution and y-Resolution in pixels
    per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and
    my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if
    it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have
    low resolution

    cubic interpolation might help some

    apologies, that would be extrapolation





    150 DPI is standard in the on demand printing business





    --
    dale - https://www.dalekelly.org/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Charlie Roberts@21:1/5 to dale on Thu Feb 21 11:59:01 2019
    On Wed, 13 Feb 2019 20:37:38 -0500, dale <dale@dalekelly.org> wrote:

    On 10/2/2018 12:35 PM, artrotterdamart@gmail.com wrote:
    For new files GIMP can set the x-Resolution and y-Resolution in pixels per inch (default: 72x72)

    I never changed the default, my publisher says he needs 150 DPI, and my files are according to GIMP 96x96. Publisher says they are 118 DPI

    One can of course not raise the dots per inch to 150x150, however if it can be done, my art prints files are low resolution

    QUESTION how can I make 150 DPI resolution files from files which have low resolution

    150 DPI is standard in the on demand printing business


    should be 300 dpi in order to account for Nyquist's Theorem

    the eyes can resolve 150 lpi

    twice the eye, 300 dpi , avoids banding/etc.

    Hope this helps ....

    https://www.makeuseof.com/tag/change-image-dpi-designers-need-know/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)