imgproc: move ShapeMatchModes enum from c to c++ header

modules/imgproc/include/opencv2/imgproc.hpp

@@ -452,6 +452,20 @@ enum ContourApproximationModes {
     CHAIN_APPROX_TC89_KCOS = 4
 };
 
+/** @brief Shape matching methods
+
+\f$A\f$ denotes object1,\f$B\f$ denotes object2
+
+\f$\begin{array}{l} m^A_i =  \mathrm{sign} (h^A_i)  \cdot \log{h^A_i} \\ m^B_i =  \mathrm{sign} (h^B_i)  \cdot \log{h^B_i} \end{array}\f$
+
+and \f$h^A_i, h^B_i\f$ are the Hu moments of \f$A\f$ and \f$B\f$ , respectively.
+*/
+enum ShapeMatchModes {
+    CONTOURS_MATCH_I1  =1, //!< \f[I_1(A,B) =  \sum _{i=1...7}  \left |  \frac{1}{m^A_i} -  \frac{1}{m^B_i} \right |\f]
+    CONTOURS_MATCH_I2  =2, //!< \f[I_2(A,B) =  \sum _{i=1...7}  \left | m^A_i - m^B_i  \right |\f]
+    CONTOURS_MATCH_I3  =3  //!< \f[I_3(A,B) =  \max _{i=1...7}  \frac{ \left| m^A_i - m^B_i \right| }{ \left| m^A_i \right| }\f]
+};
+
 //! @} imgproc_shape
 
 //! Variants of a Hough transform
@@ -3916,7 +3930,7 @@ The function compares two shapes. All three implemented methods use the Hu invar
 
 @param contour1 First contour or grayscale image.
 @param contour2 Second contour or grayscale image.
-@param method Comparison method, see ::ShapeMatchModes
+@param method Comparison method, see cv::ShapeMatchModes
 @param parameter Method-specific parameter (not supported now).
  */
 CV_EXPORTS_W double matchShapes( InputArray contour1, InputArray contour2,

modules/imgproc/include/opencv2/imgproc/types_c.h

@@ -501,15 +501,8 @@ enum
     CV_POLY_APPROX_DP = 0
 };
 
-/** @brief Shape matching methods
-
-\f$A\f$ denotes object1,\f$B\f$ denotes object2
-
-\f$\begin{array}{l} m^A_i =  \mathrm{sign} (h^A_i)  \cdot \log{h^A_i} \\ m^B_i =  \mathrm{sign} (h^B_i)  \cdot \log{h^B_i} \end{array}\f$
-
-and \f$h^A_i, h^B_i\f$ are the Hu moments of \f$A\f$ and \f$B\f$ , respectively.
-*/
-enum ShapeMatchModes
+/** Shape matching methods */
+enum
 {
     CV_CONTOURS_MATCH_I1  =1, //!< \f[I_1(A,B) =  \sum _{i=1...7}  \left |  \frac{1}{m^A_i} -  \frac{1}{m^B_i} \right |\f]
     CV_CONTOURS_MATCH_I2  =2, //!< \f[I_2(A,B) =  \sum _{i=1...7}  \left | m^A_i - m^B_i  \right |\f]