Merge pull request opencv#17701 from pemmanuelviel:pev-lshIndexParams-consistency

Author: alalek

modules/flann/include/opencv2/flann.hpp

@@ -224,9 +224,9 @@ class GenericIndex
         struct LshIndexParams : public IndexParams
         {
             LshIndexParams(
-                unsigned int table_number,
-                unsigned int key_size,
-                unsigned int multi_probe_level );
+                int table_number,
+                int key_size,
+                int multi_probe_level );
         };
         @endcode
         - **AutotunedIndexParams** When passing an object of this type the index created is

modules/flann/include/opencv2/flann/lsh_index.h

@@ -58,15 +58,15 @@ namespace cvflann
 
 struct LshIndexParams : public IndexParams
 {
-    LshIndexParams(unsigned int table_number = 12, unsigned int key_size = 20, unsigned int multi_probe_level = 2)
+    LshIndexParams(int table_number = 12, int key_size = 20, int multi_probe_level = 2)
     {
         (*this)["algorithm"] = FLANN_INDEX_LSH;
         // The number of hash tables to use
-        (*this)["table_number"] = static_cast<int>(table_number);
+        (*this)["table_number"] = table_number;
         // The length of the key in the hash tables
-        (*this)["key_size"] = static_cast<int>(key_size);
+        (*this)["key_size"] = key_size;
         // Number of levels to use in multi-probe (0 for standard LSH)
-        (*this)["multi_probe_level"] = static_cast<int>(multi_probe_level);
+        (*this)["multi_probe_level"] = multi_probe_level;
     }
 };