Back to using Owner. A couple of tests for it too.

lib/fog/compute/requests/aws/describe_images.rb

@@ -69,6 +69,14 @@ module Fog
             Fog::Mock.not_implemented
           end
 
+          if owner = filters.delete('Owner')
+            if owner == 'self'
+              filters['owner-id'] = self.data[:owner_id]
+            else
+              filters['owner-alias'] = owner
+            end
+          end
+
           response = Excon::Response.new
 
           aliases = {

lib/fog/compute/requests/aws/register_image.rb

@@ -79,7 +79,7 @@ module Fog
               'ramdiskId' => Fog::AWS::Mock.ramdisk_id,
               'platform' => 'Linux',
               'stateReason' => {},
-              'imageOwnerAlias' => 'self',
+              'imageOwnerAlias' => self.data[:owner_id],
               'name' => name,
               'description' => description,
               'rootDeviceType' => '',

tests/compute/requests/aws/image_tests.rb

@@ -44,10 +44,20 @@ Shindo.tests('Fog::Compute[:aws] | image requests', ['aws']) do
       end
 
       @image_id = @image['imageId']
+
+      tests("#describe_images('Owner' => 'self')").formats(@describe_images_format) do
+        Fog::Compute[:aws].describe_images('Owner' => 'self').body
+      end
     end
 
     tests("#describe_images('image-id' => '#{@image_id}')").formats(@describe_images_format) do
-      Fog::Compute[:aws].describe_images('image-id' => @image_id).body
+      @other_image = Fog::Compute[:aws].describe_images('image-id' => @image_id).body
+    end
+
+    unless Fog.mocking?
+      tests("#describe_images('Owner' => '#{@other_image['imageOwnerAlias']}', 'image-id' => '#{@image_id}')").formats(@describe_images_format) do
+        Fog::Compute[:aws].describe_images('Owner' => @other_image['imageOwnerAlias'], 'image-id' => @image_id).body
+      end
     end
   end
 end