Home > Archive > PHP Language > February 2005 > Changing DPI of the image.
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| Author |
Changing DPI of the image.
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| PHP creates images (like PNG) with 72 DPI. How can I create an image with
300 DPI?
Thank you.
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| Michael Vilain 2005-02-22, 8:55 am |
| In article <PQzSd.3199$873.2950@newsread3.news.pas.earthlink.net>,
"Hello" <no-emai@sorry.com> wrote:
> PHP creates images (like PNG) with 72 DPI. How can I create an image with
> 300 DPI?
>
> Thank you.
buy photoshop and create the original image with that resolution.
--
DeeDee, don't press that button! DeeDee! NO! Dee...
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| This is NOT just for one file. My prog generates a picture file which I need
to print. However, with 72DPI it is way too blocky, I need 300DPI. The
conversion has to be with PHP.
"Michael Vilain" <vilain@spamcop.net> wrote in message
news:vilain-433A9A.00324022022005@comcast.dca.giganews.com...
> In article <PQzSd.3199$873.2950@newsread3.news.pas.earthlink.net>,
> "Hello" <no-emai@sorry.com> wrote:
>
>
> buy photoshop and create the original image with that resolution.
>
> --
> DeeDee, don't press that button! DeeDee! NO! Dee...
>
>
>
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| Dave Patton 2005-02-22, 3:57 pm |
| "Hello" <no-emai@sorry.com> wrote in
news:PQzSd.3199$873.2950@newsread3.news.pas.earthlink.net:
> PHP creates images (like PNG) with 72 DPI. How can I create an image
> with 300 DPI?
Sounds like you're using the PHP Image functions, which
use the GD library.
Use ImageMagick instead(or it might work if you recompile
your GD library and define a higher DPI value).
--
Dave Patton
Canadian Coordinator, Degree Confluence Project
http://www.confluence.org/
My website: http://members.shaw.ca/davepatton/
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| Philip Ronan 2005-02-22, 3:57 pm |
| Dave Patton wrote:
> "Hello" <no-emai@sorry.com> wrote in
> news:PQzSd.3199$873.2950@newsread3.news.pas.earthlink.net:
>
>
> Sounds like you're using the PHP Image functions, which
> use the GD library.
> Use ImageMagick instead(or it might work if you recompile
> your GD library and define a higher DPI value).
Alternatively you could turn on output buffering, capture the PNG source in
a string, and change the binary values containing the DPI information. The
PNG file format isn't all that complicated, so it shouldn't be too difficult
to fix.
--
phil [dot] ronan @ virgin [dot] net
http://vzone.virgin.net/phil.ronan/
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