--- a/Depth24Image.st	Mon Jun 11 10:50:04 2018 +0100
+++ b/Depth24Image.st	Wed Jul 11 16:58:29 2018 +0200
@@ -2,6 +2,7 @@
 
 "
  COPYRIGHT (c) 1993 by Claus Gittinger
+ COPYRIGHT (c) 2018 Patrik Svestka
 	      All Rights Reserved
 
  This software is furnished under a license and may be used
@@ -3352,6 +3353,14 @@
     ^ -8
 !
 
+isDepth24Image
+    "return true if the image is instance of Depth24Image"
+   (self bitsPerPixel == 24) ifTrue:[^ true].  
+    ^ false
+
+    "Created: / 16-04-2018 / 16:53:00 / svestkap"
+!
+
 redBitsOf:pixel
     "given a pixel-value, return the red component as byteValue (0..255)"