From 37d3b67704bc9416f5272fe849d3082024a9e487 Mon Sep 17 00:00:00 2001
From: "Joseph M. Burling" <josephburling@gmail.com>
Date: Thu, 3 Dec 2020 19:41:06 -0600
Subject: [PATCH] fix compiler warnings

---
 source/channel_color.h       | 2 +-
 source/channel_opticalflow.h | 1 -
 source/channel_orientation.h | 2 +-
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/source/channel_color.h b/source/channel_color.h
index 4fdfd9a..b630b37 100644
--- a/source/channel_color.h
+++ b/source/channel_color.h
@@ -189,7 +189,7 @@ namespace debug {
     Strings chan_type = {"Luminance", "Red vs. Green", "Blue vs. Yellow"};
 
     std::vector<Strings> each_image{3};
-    for (int n; n < 3; ++n) {
+    for (int n = 0; n < 3; ++n) {
       std::stringstream par1;
       par1.precision(4);
       par1 << "scale: " << pars.scale;
diff --git a/source/channel_opticalflow.h b/source/channel_opticalflow.h
index 519ad40..0e816e2 100644
--- a/source/channel_opticalflow.h
+++ b/source/channel_opticalflow.h
@@ -349,7 +349,6 @@ namespace debug {
   void
   visualize(const MatVec &flow_fields, const flow::Parameters &pars, const cv::Size &resize, const DisplayData &disp)
   {
-    flow_fields.size();
     if (flow_fields.empty() || !pars.toggled) return;
 
     // copy grayscale flow images to color images
diff --git a/source/channel_orientation.h b/source/channel_orientation.h
index 02954ec..1c4228a 100644
--- a/source/channel_orientation.h
+++ b/source/channel_orientation.h
@@ -165,7 +165,7 @@ namespace debug {
   {
     std::vector<Strings> per_img;
 
-    for (int n; n < gabor_pars.theta.size(); ++n) {
+    for (int n = 0; n < gabor_pars.theta.size(); ++n) {
       std::stringstream size;
       std::stringstream sigma;
       std::stringstream theta;