Fix spelling typos

modules/calib3d/src/calibration.cpp

@@ -48,7 +48,7 @@
 #include <iterator>
 
 /*
-    This is stright-forward port v3 of Matlab calibration engine by Jean-Yves Bouguet
+    This is straight-forward port v3 of Matlab calibration engine by Jean-Yves Bouguet
     that is (in a large extent) based on the paper:
     Z. Zhang. "A flexible new technique for camera calibration".
     IEEE Transactions on Pattern Analysis and Machine Intelligence, 22(11):1330-1334, 2000.

modules/calib3d/src/chessboard.cpp

@@ -2474,7 +2474,7 @@ int Chessboard::Board::validateCorners(const cv::Mat &data,cv::flann::Index &fla
     std::vector<cv::Point2f>::const_iterator iter1 = points.begin();
     for(;iter1 != points.end();++iter1)
     {
-        // we do not have to check for NaN because of getCorners(flase)
+        // we do not have to check for NaN because of getCorners(false)
         std::vector<cv::Point2f>::const_iterator iter2 = iter1+1;
         for(;iter2 != points.end();++iter2)
             if(*iter1 == *iter2)
@@ -3007,7 +3007,7 @@ Chessboard::Board Chessboard::detectImpl(const Mat& gray,std::vector<cv::Mat> &f
     if(keypoints_seed.empty())
         return Chessboard::Board();
 
-    // check how many points are likely a checkerbord corner
+    // check how many points are likely a checkerboard corner
     float response = fabs(keypoints_seed.front().response*MIN_RESPONSE_RATIO);
     std::vector<KeyPoint>::const_iterator seed_iter = keypoints_seed.begin();
     int count = 0;

modules/calib3d/src/chessboard.hpp

@@ -650,7 +650,7 @@ class Chessboard: public cv::Feature2D
                         bool top(bool check_empty=false);     // moves one corner to the top or returns false
                         bool checkCorner()const;              // returns true if the current corner belongs to at least one
                                                               // none empty cell
-                        bool isNaN()const;                    // returns true if the currnet corner is NaN
+                        bool isNaN()const;                    // returns true if the current corner is NaN
 
                         const cv::Point2f* operator*() const;  // current corner coordinate
                         cv::Point2f* operator*();              // current corner coordinate