diff --git a/lib/prawn/images.rb b/lib/prawn/images.rb
index 8ee747956..3af712188 100644
--- a/lib/prawn/images.rb
+++ b/lib/prawn/images.rb
@@ -118,6 +118,18 @@ def embed_image(pdf_obj, info, options)
 
       if options[:at]
         x, y = map_to_absolute(options[:at])
+        case options[:position]
+        when :center
+          x-=w/2
+        when :right
+          x-=w
+        end
+        case options[:vposition]
+        when :center
+          y+=h/2
+        when :bottom
+          y+=h
+        end
       else
         x, y = image_position(w, h, options)
         move_text_position h