<% form_for @image_model do |f| %>

<%= image_tag(@image_model.image.url) %>

<%= f.hidden_field :crop_x, :id => 'crop_x' %> <%= f.hidden_field :crop_y, :id => 'crop_y' %> <%= f.hidden_field :crop_w, :id => 'crop_w' %> <%= f.hidden_field :crop_h, :id => 'crop_h' %> <%= hidden_field_tag :crop_settings, @image_model.crop_settings.to_json %> <% end %>