Plugins - ExifFu
Add to favoritesExifFu
This comes from one project that required reading exif tags for image rotation
Exif Fu assumes you’re using attachment_fu as your file handler (thus exif_fu), although it is easy enough to hack the library to use any other file library.
Exif Fu requires ExifTool by Phil Harvey (http://www.sno.phy.queensu.ca/~phil/exiftool/) and MiniExifTool (http://miniexiftool.rubyforge.org/) which you can install with gem install mini_exiftool
Example
All you need to do is add exif_fu to your model and you’re ready to go. Here is one example:
class Photo < ActiveRecord::Base
exif_fu
has_attachment :content_type => :image,
:storage => :file_system,
:processor => :mini_magick,
:size => 500..5.megabytes,
:path_prefix => "public/#{table_name}",
:thumbnails => {:medium => '600x600>', :thumb => '100x100>' }
validates_as_attachment
end
Usage
Once you’ve setup your model, all you have to do is call some of the methods on the model, some examples:
photo.iso would reutrn "800"
photo.shot_by would reutrn "Matthew Vincent"
photo.aperture would reutrn 4.0
photo.exif_tag("MyCustomExifTag") would reutrn "You got your tag"
You can see the rest of the included methods in the exif_fu.rb library, or just use the exif_tag to call any exif tag you want to. Please note that exif tags are case sensitive.
Copyright © 2008 Matthew Vincent, released under the MIT license
