From 706f83ffd46b1c7ec552ac52b9d2bba2ddb6c6fd Mon Sep 17 00:00:00 2001
From: matlabbe <matlabbe@gmail.com>
Date: Sun, 17 Jan 2016 14:16:19 -0500
Subject: [PATCH] Added ASSERT before detecting features to make sure that an
 image exist and is CV_8UC1 type

---
 src/FindObject.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/FindObject.cpp b/src/FindObject.cpp
index 962b501c..71c1c296 100644
--- a/src/FindObject.cpp
+++ b/src/FindObject.cpp
@@ -630,6 +630,9 @@ public:
 		timeSubPix_(0)
 	{
 		UASSERT(detector && extractor);
+		UASSERT_MSG(!image.empty() && image.type() == CV_8UC1,
+				uFormat("Image of object %d is null or not type CV_8UC1!?!? (cols=%d, rows=%d, type=%d)",
+						objectId, image.cols, image.rows, image.type()).c_str());
 	}
 	int objectId() const {return objectId_;}
 	const cv::Mat & image() const {return image_;}