From 20807d62846ddd13ec89db68d8feed67b9f6238c Mon Sep 17 00:00:00 2001
From: Michael Vines <mvines@silklabs.com>
Date: Sun, 30 Aug 2015 00:59:16 -0700
Subject: [PATCH] Only run equalizeHist() if an BGR matrix was provided

Grayscale matrices are used unmodified.
---
 src/CascadeClassifierWrap.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/CascadeClassifierWrap.cc b/src/CascadeClassifierWrap.cc
index 3950c04..6dbf68d 100755
--- a/src/CascadeClassifierWrap.cc
+++ b/src/CascadeClassifierWrap.cc
@@ -61,10 +61,10 @@ class AsyncDetectMultiScale : public NanAsyncWorker {
 
       if(this->im->mat.channels() != 1) {
         cvtColor(this->im->mat, gray, CV_BGR2GRAY);
+        equalizeHist( gray, gray);
       } 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));
       res = objects;
     }