From 9f44d89ab7bfd38a1e31217efa5e247166bc2774 Mon Sep 17 00:00:00 2001
From: Gary Bradski <garybradski@gmail.com>
Date: Tue, 4 Jul 2017 00:49:45 +0000
Subject: [PATCH] 16 - 18

---
 README.md         | 3 ++-
 example_16-01.cpp | 6 ++++--
 example_17-01.cpp | 2 +-
 example_17-02.cpp | 6 ++++--
 example_18-01.cpp | 2 +-
 5 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 166b7fb..a005915 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ This is the example code that accompanies Learning OpenCV 3 by Adrian Kaehler an
 * ~~In progress June 20, 2017~~
 * ~~In progress June 22, 2017~~
 * ~~In progress July 02, 2017~~
+* In progress July 03, 2017
 
 **To do:**
 * ~~Chapter 15~~
@@ -20,7 +21,7 @@ This is the example code that accompanies Learning OpenCV 3 by Adrian Kaehler an
 * ~~Chapter 22~~
 
 Checking Chapters
-~~2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15~~ 16 17 18 19 20 ~~21 22 23~~
+~~2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,~~ 19, 20, ~~21 22 23~~
 
 * Submit associated errata for ~~15 16~~ 17 18 19 20 21 22
 * Throw in some bonus material
diff --git a/example_16-01.cpp b/example_16-01.cpp
index 316e807..eb2f80b 100644
--- a/example_16-01.cpp
+++ b/example_16-01.cpp
@@ -8,8 +8,10 @@ using namespace std;
 static const int MAX_CORNERS = 1000;
 
 void help( char** argv ) {
-  cout << "Call: " <<argv[0] <<" [image1] [image2]" << endl;
-  cout << "Demonstrates Pyramid Lucas-Kanade optical flow." << endl;
+  cout << "\nExample 16-1: Pyramid L-K optical flow example.\n" << endl;
+  cout << "Call: " <<argv[0] <<" [image1] [image2]\n" << endl;
+  cout << "\nExample:\n" << argv[0] << " ../example_16-01-imgA.png ../example_16-01-imgB.png\n" << endl;
+  cout << "Demonstrates Pyramid Lucas-Kanade optical flow.\n" << endl;
 }
 
 int main(int argc, char** argv) {
diff --git a/example_17-01.cpp b/example_17-01.cpp
index 93719ed..f89525b 100644
--- a/example_17-01.cpp
+++ b/example_17-01.cpp
@@ -16,7 +16,7 @@ using std::endl;
 
 void help(char** argv ) {
     cout << "\n"
-         << "Example code for using cv::KalmanFilter\n"
+         << "Example 17-1: code for using cv::KalmanFilter\n"
          << argv[0] << "\n\n"
          << "For example:\n"
          << argv[0] <<"\n\n"
diff --git a/example_17-02.cpp b/example_17-02.cpp
index ec93d58..3258c2e 100644
--- a/example_17-02.cpp
+++ b/example_17-02.cpp
@@ -45,8 +45,10 @@ int main(int argc, char** argv) {
     // Program expects at least one argument that is path to video file
     //
     if (argc < 2) {
-        cerr << "Use:\n" << argv[0] << " <video_file>\n"
-             << "to run this demo\n";
+        cerr 	<< "\nExample 17-2: Farnback optical flow example\n"
+				<< "Use:\n" << argv[0] << " <path/video_file>\n"
+				<< "Example:\n" << argv[0] << " ../test.avi\n"
+				<< std::endl;
         exit(1);
     }
 
diff --git a/example_18-01.cpp b/example_18-01.cpp
index 5194d89..c311568 100644
--- a/example_18-01.cpp
+++ b/example_18-01.cpp
@@ -14,7 +14,7 @@ void help(char **argv) {  // todo rewrite this
          << "              reading and collecting the requested number of views,\n" 
          << "              and calibrating the camera\n\n" 
          << "Call:\n" << argv[0] << " <board_width> <board_height> <number_of_boards> <if_video,_delay_between_framee_capture> <image_scaling_factor>\n\n"
-         << "Example:\n./example_18-01 9 6 15 500 0.5\n"
+         << "Example:\n" << argv[0] << " 9 6 15 500 0.5\n"
          << "-- to use the checkerboard9x6.png provided\n\n"
          << " * First it reads in checker boards and calibrates itself\n" 
          << " * Then it saves and reloads the calibration matricies\n"