diff --git a/osi_sensorview.proto b/osi_sensorview.proto
index a890261a7..a276e803a 100644
--- a/osi_sensorview.proto
+++ b/osi_sensorview.proto
@@ -313,8 +313,9 @@ message CameraSensorView
 
     // Raw image data.
     //
-    // The raw image data in the memory layout and order specified by the
-    // camera sensor input configuration.
+    // The raw image data in the memory layout specified by the camera sensor
+    // input configuration. Pixel order is left-to-right, top-to-bottom (think
+    // of scan lines in a TV).
     //
     optional bytes image_data = 2;
 }