Image resize issue with PaperClip and Rails 3 - ruby-on-rails-3

Question

Having terrible trouble with my application image rendering since an upgrade to Ruby 1.9.3, Rails 3.1.0.rc4 and Paperclip 3.4.0.
No matter what variation of settings I give Paperclip the infile linked to below comes out blurred as is shown by the linked outfile.
The outfile must fit into a box of 620x412 as shown here.
Link to input file
Link to output file this code generates
The full code for the model is below ...
class Propertyimage < ActiveRecord::Base
belongs_to :property
validates_presence_of :description
validates_presence_of :sortorder
has_attached_file :image, :styles => { :export => {:geometry => "620x412#", :quality => 100, :format => 'JPG'} },
:path => ":rails_root/public/system/:attachment/:id/:style/:filename",
:url => "/system/:attachment/:id/:style/:filename"
end

Answer 1

I had a similar problem and was able to fix after a lot of trial and error using three criteria: image size specification, convert_options, and scaling the image. For example, in your Propertyimage class try:
has_attached_file :image,
:styles => { :original => ["640x480", :jpg], :export => {:geometry => "620x412#", :quality => 100, :format => 'JPG'} },
:convert_options => { :all => "-quality 100" },
:path => ":rails_root/public/system/:attachment/:id/:style/:filename",
:url => "/system/:attachment/:id/:style/:filename"
Then you can play with the sizes of your image tag, or as in my case using a PDF, Id used the scale option:
pdf.image the_file_name, :at => [0, 720], :scale => 0.75