--- a/Core/Enumerations.h	Thu May 31 18:44:05 2018 +0200
+++ b/Core/Enumerations.h	Fri Jun 01 10:51:06 2018 +0200
@@ -225,7 +225,13 @@
      * {description}{This format describes a color image. The pixels are stored in 6
      * consecutive bytes. The memory layout is RGB.}
      **/
-    PixelFormat_RGB48 = 9
+    PixelFormat_RGB48 = 9,
+
+    /**
+     * {summary}{Graylevel, unsigned 64bpp image.}
+     * {description}{The image is graylevel. Each pixel is unsigned and stored in 4 bytes.}
+     **/
+    PixelFormat_Grayscale64 = 10
   };