tracker/pt: fix prototypes

1 files changed, 1 insertions, 1 deletions

diff --git a/tracker-pt/module/point_extractor.h b/tracker-pt/module/point_extractor.h
index 03b43489..06948ac7 100644
--- a/tracker-pt/module/point_extractor.h
+++ b/tracker-pt/module/point_extractor.h
@@ -48,7 +48,7 @@ private:
     void ensure_channel_buffers(const cv::Mat& orig_frame);
     void ensure_buffers(const cv::Mat& frame);
 
-    void extract_single_channel(const cv::Mat& orig_frame, int idx, cv::Mat& dest);
+    void extract_single_channel(const cv::Mat& orig_frame, int idx, cv::Mat1b& dest);
 
     void color_to_grayscale(const cv::Mat& frame, cv::Mat1b& output);
     void threshold_image(const cv::Mat& frame_gray, cv::Mat1b& output);