checked 19 20

Tangduf · Jul 7, 2017 · 2cf361c · 2cf361c
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diff --git a/README.md b/README.md
@@ -8,7 +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
+* ~~In progress July 03, 2017~~
 
 **To do:**
 * ~~Chapter 15~~
@@ -21,7 +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_16-02.cpp b/example_16-02.cpp
@@ -1,4 +1,9 @@
 // Example 16-2. 2D Feature detectors and 2D Extra Features framework
+//
+// Note, while this code is free to use commercially, not all the algorithms are. For example
+// sift is patented. If you are going to use this commercially, check out the non-free 
+// algorithms and secure license to use them.
+//
 
 #include <vector>
 #include <iostream>
@@ -166,6 +171,7 @@ int main(int argc, char** argv) {
                 << "Examples:\n"
                 << argv[0] << " surf knn ../box.png ../box_in_scene.png\n"
                 << argv[0] << " fastfreak bf ../box.png ../box_in_scene.png\n"
+                << "\nNOTE: Not all of these methods are free, check licensing conditions!\n\n"
                 << std::endl;
         exit(1);
     }

diff --git a/example_19-01.cpp b/example_19-01.cpp
@@ -10,7 +10,7 @@ void help(char *argv[]) {
 			<< "\nCall:"
 			<< "\n./example_19-01 <chessboard_width> <chessboard_height> <path/camera_calib_filename> <path/chessboard_image>"
 			<< "\n\nExample:"
-			<< "\n./example_19-01 0 0 ../birdseye/intrinsics.xml ../birdseye\n"
+			<< "\n./example_19-01 12 12 ../birdseye/intrinsics.xml ../birdseye/IMG_0215L.jpg\n"
 			<< "\nPress 'd' for lower birdseye view, and 'u' for higher (it adjusts the apparent 'Z' height), Esc to exit\n" 
 			<< endl;
 }
@@ -115,7 +115,7 @@ int main(int argc, char *argv[]) {
   // LET THE USER ADJUST THE Z HEIGHT OF THE VIEW
   //
   cout << "\nPress 'd' for lower birdseye view, and 'u' for higher (it adjusts the apparent 'Z' height), Esc to exit" << endl;
-  double Z = 25;
+  double Z = 15;
   cv::Mat birds_image;
   for (;;) {
     // escape key stops