From 433f672737a98696a15699a32973f2e0824c1ac1 Mon Sep 17 00:00:00 2001
From: Rushuai <rushuai.liu@magicision.com>
Date: Tue, 23 Jan 2018 11:34:30 +0800
Subject: [PATCH] fix gray image issue, the dx/dy channels shoule be same as
 image channels

---
 src/fhog.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/fhog.cpp b/src/fhog.cpp
index 28898e8..cdcd042 100644
--- a/src/fhog.cpp
+++ b/src/fhog.cpp
@@ -110,9 +110,9 @@ int getFeatureMaps(const IplImage* image, const int k, CvLSVMFeatureMapCaskade *
     numChannels = image->nChannels;
 
     dx    = cvCreateImage(cvSize(image->width, image->height), 
-                          IPL_DEPTH_32F, 3);
+                          IPL_DEPTH_32F, numChannels);
     dy    = cvCreateImage(cvSize(image->width, image->height), 
-                          IPL_DEPTH_32F, 3);
+                          IPL_DEPTH_32F, numChannels);
 
     sizeX = width  / k;
     sizeY = height / k;