Merge pull request #1523 from adrianheron:python_custom_dictionary

* support custom dictionaries via python bindngs

* make markerSize and maxCorrectionBits writeable

modules/aruco/include/opencv2/aruco/dictionary.hpp

@@ -61,9 +61,9 @@ namespace aruco {
 class CV_EXPORTS_W Dictionary {
 
     public:
-    CV_PROP Mat bytesList;         // marker code information
-    CV_PROP int markerSize;        // number of bits per dimension
-    CV_PROP int maxCorrectionBits; // maximum number of bits that can be corrected
+    CV_PROP_RW Mat bytesList;         // marker code information
+    CV_PROP_RW int markerSize;        // number of bits per dimension
+    CV_PROP_RW int maxCorrectionBits; // maximum number of bits that can be corrected
 
 
     /**
@@ -120,13 +120,13 @@ class CV_EXPORTS_W Dictionary {
     /**
       * @brief Transform matrix of bits to list of bytes in the 4 rotations
       */
-    static Mat getByteListFromBits(const Mat &bits);
+    CV_WRAP static Mat getByteListFromBits(const Mat &bits);
 
 
     /**
       * @brief Transform list of bytes to matrix of bits
       */
-    static Mat getBitsFromByteList(const Mat &byteList, int markerSize);
+    CV_WRAP static Mat getBitsFromByteList(const Mat &byteList, int markerSize);
 };