diff --git a/django_web_galleries/web_galleries/models.py b/django_web_galleries/web_galleries/models.py
index e32303d..78cedef 100644
--- a/django_web_galleries/web_galleries/models.py
+++ b/django_web_galleries/web_galleries/models.py
@@ -1,7 +1,12 @@
+import uuid
+
 from django.db import models
 from django.core.exceptions import ValidationError
 from django.utils.translation import gettext as _
 
+def get_uuid():
+    return str(uuid.uuid4())
+
 class Visitor(models.Model):
     """
     Stores information about a visitor of this application.
@@ -10,7 +15,8 @@ class Visitor(models.Model):
     """
     session_id = models.CharField(
         _('A cookie set by this application to identify a visitor by session'),
-        max_length=50
+        max_length=50,
+        default=get_uuid
     )
     name = models.CharField(
         _('Human readable, self assigned name of the visitor'),
@@ -67,6 +73,13 @@ class Image(models.Model):
     An image contains the path to the image file and several information
     like description, uploader and affiliation to galleries.
     """
+
+    title = models.CharField(
+        _('Title of the image'),
+        max_length=100,
+        null=True,
+        blank=True
+    )
     description = models.TextField(
         _('An optional description of the Image'),
         null=True
@@ -105,3 +118,11 @@ class Image(models.Model):
         related_name='images'
     )
 
+    def __str__(self):
+        if self.title:
+            return self.title
+        elif self.description:
+            return self.description[:100]
+        else:
+            return super.__str__()
+