Merge pull request #9075 from TonyLianLong:master

Remove unnecessary Non-ASCII characters from source code (#9075)

* Remove unnecessary Non-ASCII characters from source code

Remove unnecessary Non-ASCII characters and replace them with ASCII
characters

* Remove dashes in the @param statement

Remove dashes and place single space in the @param statement to keep
coding style

* misc: more fixes for non-ASCII symbols

* misc: fix non-ASCII symbol in CMake file

modules/stitching/include/opencv2/stitching/detail/motion_estimators.hpp

@@ -201,7 +201,7 @@ protected:
     // Threshold to filter out poorly matched image pairs
     double conf_thresh_;
 
-    //Levenberg–Marquardt algorithm termination criteria
+    //Levenberg-Marquardt algorithm termination criteria
     TermCriteria term_criteria_;
 
     // Camera parameters matrix (CV_64F)

modules/stitching/include/opencv2/stitching/detail/warpers.hpp

@@ -243,7 +243,7 @@ struct CV_EXPORTS SphericalProjector : ProjectorBase
 /** @brief Warper that maps an image onto the unit sphere located at the origin.
 
  Projects image onto unit sphere with origin at (0, 0, 0) and radius scale, measured in pixels.
- A 360° panorama would therefore have a resulting width of 2 * scale * PI pixels.
+ A 360 panorama would therefore have a resulting width of 2 * scale * PI pixels.
  Poles are located at (0, -1, 0) and (0, 1, 0) points.
 */
 class CV_EXPORTS SphericalWarper : public RotationWarperBase<SphericalProjector>