Get Image Dimensions Given Local File Path

rubyonrails-talk
1

Hi All,

I have an image file (.jpg) that I can open via File.open() and I am curious on the easiest way to get the dimensions of this file. I’d prefer this to be a ruby/rails way and not a javascript method. Basically, I am looking for a way to verify that when a user uploads an image file that it is not larger than x by y. I’ve been looking around the web and I’m having trouble finding a way to do this. Also, if there is a way to just resize any image over some pre-defined size that would work as well.

Thanks in advance, Ryan

2

Look at:

http://www.simplesystems.org/RMagick/doc/comtasks.html

Ryan Prins wrote:

3

try FlexImage http://beautifulpixel.com/flex_image/index.html

It allows you to crop, resize, etc. checkout the RDoc link above, and see if that will work for you.

Matt

4

There are RoR plugins that allow you to resize and validate image uploads. Try the file_column plugin:

http://www.kanthak.net/opensource/file_column/