From ec6e08e70caee652a27f4dcdc01bd992e7157d3f Mon Sep 17 00:00:00 2001
From: Josh Klontz <Joshua.Klontz@noblis.org>
Date: Tue, 24 Jun 2014 13:41:41 -0400
Subject: [PATCH] Have Cascade propagate empty templates when enrollAll is false, for #207

---
 openbr/plugins/cascade.cpp | 7 +++++++
 1 file changed, 7 insertions(+), 0 deletions(-)

diff --git a/openbr/plugins/cascade.cpp b/openbr/plugins/cascade.cpp
index 218b031..d91ac89 100644
--- a/openbr/plugins/cascade.cpp
+++ b/openbr/plugins/cascade.cpp
@@ -379,6 +379,13 @@ class CascadeTransform : public MetaTransform
         foreach (const Template &t, src) {
             const bool enrollAll = t.file.getBool("enrollAll");
 
+            // Mirror the behavior of ExpandTransform in the special case
+            // of an empty template.
+            if (t.empty() && !enrollAll) {
+                dst.append(t);
+                continue;
+            }
+
             for (int i=0; i<t.size(); i++) {
                 const Mat &m = t[i];
                 std::vector<Rect> rects;
--
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