Multiple controller/views calling Application Help to learn image path.not working

Working with Rails 3.0

From numerous controllers with associated views, I need to display
images.

In the views to retrieve an images I have:

<img src="<%= get_image_path(@object.image_file_name) %> />

get_image_path is defined in the Application helper:

module ApplicationHelper
def get_image_path(sought_image_file_name)

return_string = ''
unless (sought_image_file_name.blank?    ## although I do testing 

for
blank? image_file_name in the erb view
return_string =
“#{Rails.application.root}/public/images/item_images/” +
sought_image_file_name
### Have tried return_string "…/public and "./public and these
have
not worked
end
return return_string
end

But I keep getting the error:

Started GET
“/home/echomarket/echomarket.org/public/images/item_images/zv37bNYgL25LisYvnGfGkKMndfm7ZD_Chrysanthemum.jpg”
for …

ActionController::RoutingError (No route matches
“/home/echomarket/echomarket.org/public/images/item_images/zv37bNYgL25LisYvnGfGkKMndfm7ZD_Chrysanthemum.jpg”):

The file definitely exists in that path, per FIleZilla and Putty

I do not understand the tie between routes.rb and multiple
controllers…

Thanks,

Liz