Hello @kartik,
In your model class add a method like:
def image_tag(self):
from django.utils.html import escape
return u'<img src="%s" />' % escape(<URL to the image>)
image_tag.short_description = 'Image'
image_tag.allow_tags = True
and in your admin.py add:
fields = ( 'image_tag', )
readonly_fields = ('image_tag',)
to your ModelAdmin. If you want to restrict the ability to edit the image field, be sure to add it to the exclude attribute.
Note: With Django 1.8 and 'image_tag' only in readonly_fields it did not display. With 'image_tag' only in fields, it gave an error of unknown field. You need it both in fields and in readonly_fields in order to display correctly.
Hope this helps!!
Thank You!!