Fixed some issues found by static analysis

modules/imgcodecs/src/grfmt_exr.hpp

@@ -96,6 +96,10 @@ protected:
     bool            m_native_depth;
     bool            m_iscolor;
     bool            m_isfloat;
+
+private:
+    ExrDecoder(const ExrDecoder &); // copy disabled
+    ExrDecoder& operator=(const ExrDecoder &); // assign disabled
 };
 
 

modules/imgcodecs/src/grfmt_jpeg.hpp

@@ -70,6 +70,10 @@ protected:
 
     FILE* m_f;
     void* m_state;
+
+private:
+    JpegDecoder(const JpegDecoder &); // copy disabled
+    JpegDecoder& operator=(const JpegDecoder &); // assign disabled
 };
 
 

modules/imgcodecs/src/grfmt_tiff.hpp

@@ -117,6 +117,10 @@ protected:
     bool readHdrData(Mat& img);
     bool m_hdr;
     size_t m_buf_pos;
+
+private:
+    TiffDecoder(const TiffDecoder &); // copy disabled
+    TiffDecoder& operator=(const TiffDecoder &); // assign disabled
 };
 
 #endif