improve doc.

modules/calib3d/src/calibration.cpp

@@ -2997,7 +2997,7 @@ cvRQDecomp3x3( const CvMat *matrixM, CvMat *matrixR, CvMat *matrixQ,
         eulerAngles->z = acos(_Qz[0][0]) * (_Qz[0][1] >= 0 ? 1 : -1) * (180.0 / CV_PI);
     }
 
-    /* Calulate orthogonal matrix. */
+    /* Calculate orthogonal matrix. */
     /*
     Q = QzT * QyT * QxT
     */

modules/calib3d/src/fundam.cpp

@@ -171,7 +171,7 @@ public:
             float ww = 1.f/(Hf[6]*M[i].x + Hf[7]*M[i].y + 1.f);
             float dx = (Hf[0]*M[i].x + Hf[1]*M[i].y + Hf[2])*ww - m[i].x;
             float dy = (Hf[3]*M[i].x + Hf[4]*M[i].y + Hf[5])*ww - m[i].y;
-            err[i] = (float)(dx*dx + dy*dy);
+            err[i] = dx*dx + dy*dy;
         }
     }
 };

modules/calib3d/src/ptsetreg.cpp

@@ -594,7 +594,7 @@ public:
     bool checkSubset( InputArray _ms1, InputArray, int count ) const
     {
         Mat ms1 = _ms1.getMat();
-        // check colinearity and also check that points are too close
+        // check collinearity and also check that points are too close
         // only ms1 affects actual estimation stability
         return !haveCollinearPoints(ms1, count);
     }