Store Uploaded Images outside Web Directory

[Muhammad Taqi Hassan Bukhari]

I want to store the symofny uploaded images/documents in the User Home Directory ~/home/muhammadtaqi/Pictures.  I have set the this parameters in my config.yml file as; below

# Twig Configuration
twig:
    form:
            resources:
                - 'JbFileUploaderBundle:Form:fields.html.twig'

    debug:            "%kernel.debug%"
    strict_variables: "%kernel.debug%"
    globals:
        media_directory: ~/home/muhammadtaqi/Pictures/

# This file is auto-generated during the composer install
parameters:
    media_directory: '/home/muhammadtaqi/Pictures/'

and in the templates Em showing the images like this, 

<img src="{{ asset(media_directory~ user.avatar  )}}"
     alt="" class="img-media">

but it is still pointing to the web directory?

How can it  fix this?