Update grfmt_png.cpp

modules/imgcodecs/src/grfmt_png.cpp

@@ -370,22 +370,23 @@ bool  PngEncoder::write( const Mat& img, const std::vector<int>& params )
                 }
 
                 int compression_level = -1; // Invalid value to allow setting 0-9 as valid
-                int compression_strategy = Z_RLE; // Default strategy
+                int compression_strategy = IMWRITE_PNG_STRATEGY_RLE; // Default strategy
                 bool isBilevel = false;
 
                 for( size_t i = 0; i < params.size(); i += 2 )
                 {
-                    if( params[i] == CV_IMWRITE_PNG_COMPRESSION )
+                    if( params[i] == IMWRITE_PNG_COMPRESSION )
                     {
+                        compression_strategy = IMWRITE_PNG_STRATEGY_DEFAULT; // Default strategy
                         compression_level = params[i+1];
                         compression_level = MIN(MAX(compression_level, 0), Z_BEST_COMPRESSION);
                     }
-                    if( params[i] == CV_IMWRITE_PNG_STRATEGY )
+                    if( params[i] == IMWRITE_PNG_STRATEGY )
                     {
                         compression_strategy = params[i+1];
                         compression_strategy = MIN(MAX(compression_strategy, 0), Z_FIXED);
                     }
-                    if( params[i] == CV_IMWRITE_PNG_BILEVEL )
+                    if( params[i] == IMWRITE_PNG_BILEVEL )
                     {
                         isBilevel = params[i+1] != 0;
                     }