Add proper color keying to tracker-pt

Instead of just selecting the red/green/blue channels, also subtract the
other channels. This allows for point tracking with just colored spots,
rather than IR LEDs -- green and magenta work particularly well for
this.

This keeps the existing "Red/Green/Blue only" options, but adds
"Red/Green/Blue/Cyan/Yellow/Magenta filter" options, which do a better
job of isolating those colors.

1 files changed, 1 insertions, 0 deletions

diff --git a/tracker-pt/module/point_extractor.h b/tracker-pt/module/point_extractor.h
index a6103667..9c97b6ce 100644
--- a/tracker-pt/module/point_extractor.h
+++ b/tracker-pt/module/point_extractor.h
@@ -49,6 +49,7 @@ private:
     void ensure_buffers(const cv::Mat& frame);
 
     void extract_single_channel(const cv::Mat& orig_frame, int idx, cv::Mat1b& dest);
+    void filter_single_channel(const cv::Mat& orig_frame, float r, float g, float b, 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);