# Determine image width of png, gif or jpg?

**URL:** <https://www.ruby-forum.com/t/determine-image-width-of-png-gif-or-jpg/56582>\
**Category:** Rails\
**Created:** [April 1, 2006, 10:52am UTC](https://www.ruby-forum.com/t/determine-image-width-of-png-gif-or-jpg/56582 "2006-04-01T10:52:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![josh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/45deac/32.png) [@josh](https://www.ruby-forum.com/u/josh)\
**Post date:** [April 1, 2006, 10:52am UTC](https://www.ruby-forum.com/t/determine-image-width-of-png-gif-or-jpg/56582/1 "2006-04-01T10:52:47Z")

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Hi all

In PHP I have a neat function:

[http://ch2.php.net/function.getimagesize](http://ch2.php.net/function.getimagesize)

With it I can easily determine the dimensions of an image file. How can  
I do that in RoR?

Thanks for help. Greets,  
Josh

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**Author:** ![josh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/45deac/32.png) [@josh](https://www.ruby-forum.com/u/josh)\
**Post date:** [April 1, 2006, 5:11pm UTC](https://www.ruby-forum.com/t/determine-image-width-of-png-gif-or-jpg/56582/2 "2006-04-01T17:11:22Z")

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Hi!

There’s probably simpler way, but you can always try  
[http://rmagick.rubyforge.org/](http://rmagick.rubyforge.org/).

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**Author:** ![josh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/45deac/32.png) [@josh](https://www.ruby-forum.com/u/josh)\
**Post date:** [April 5, 2006, 9:13am UTC](https://www.ruby-forum.com/t/determine-image-width-of-png-gif-or-jpg/56582/3 "2006-04-05T09:13:03Z")

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szymek wrote:

> Hi!
> 
> There’s probably simpler way, but you can always try  
> [http://rmagick.rubyforge.org/](http://rmagick.rubyforge.org/).

Thanks, but isn’t there something like a helper method like PHP’s  
get\_image\_size()?

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<div class="post-metadata">

**Author:** ![josh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/45deac/32.png) [@josh](https://www.ruby-forum.com/u/josh)\
**Post date:** [April 5, 2006, 10:18am UTC](https://www.ruby-forum.com/t/determine-image-width-of-png-gif-or-jpg/56582/4 "2006-04-05T10:18:45Z")

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Joshua M. wrote:

> szymek wrote:
> 
> > Hi!
> > 
> > There’s probably simpler way, but you can always try  
> > [http://rmagick.rubyforge.org/](http://rmagick.rubyforge.org/).
> 
> Thanks, but isn’t there something like a helper method like PHP’s  
> get\_image\_size()?

There’s nothing built-in, but you can get dimensions for jpg, gif and  
png easily enough:

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>
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Other image types could probably be handled relatively easily, too…