From dece21619fce0f49a26aab1386397ed94149db73 Mon Sep 17 00:00:00 2001
From: Michael Vines <mvines@silklabs.com>
Date: Fri, 21 Aug 2015 13:34:04 -0700
Subject: [PATCH] AsyncDetectMultiScale: use input matrix if color conversion
 was not required.

---
 src/CascadeClassifierWrap.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/CascadeClassifierWrap.cc b/src/CascadeClassifierWrap.cc
index 0032c8f..3950c04 100755
--- a/src/CascadeClassifierWrap.cc
+++ b/src/CascadeClassifierWrap.cc
@@ -61,6 +61,8 @@ class AsyncDetectMultiScale : public NanAsyncWorker {
 
       if(this->im->mat.channels() != 1) {
         cvtColor(this->im->mat, gray, CV_BGR2GRAY);
+      } else {
+        gray = this->im->mat;
       }
       equalizeHist( gray, gray);
       this->cc->cc.detectMultiScale(gray, objects, this->scale, this->neighbors, 0 | CV_HAAR_SCALE_IMAGE, cv::Size(this->minw, this->minh));