From b14f7c99d2156fbbbf681acbfc9dcc6a07c52d09 Mon Sep 17 00:00:00 2001
From: Ari Suwendi <asuwendi@shutterfly.com>
Date: Sat, 29 Nov 2014 01:57:15 -0800
Subject: [PATCH] bug fix for a crash when input image is small

---
 modules/objdetect/src/cascadedetect.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/objdetect/src/cascadedetect.cpp b/modules/objdetect/src/cascadedetect.cpp
index d8d749fc4..07c848eb9 100644
--- a/modules/objdetect/src/cascadedetect.cpp
+++ b/modules/objdetect/src/cascadedetect.cpp
@@ -471,6 +471,10 @@ bool FeatureEvaluator::setImage( InputArray _image, const std::vector<float>& _s
     bool recalcOptFeatures = updateScaleData(imgsz, _scales);
 
     size_t i, nscales = scaleData->size();
+    if (nscales == 0)
+    {
+        return false;
+    }
     Size sz0 = scaleData->at(0).szi;
     sz0 = Size(std::max(rbuf.cols, (int)alignSize(sz0.width, 16)), std::max(rbuf.rows, sz0.height));