added support for uncompressed parameters to tiff image format as described…

added support for uncompressed parameters to tiff image format as described here: expertland.net/question/b6o3n6p9a72341db823b48nl98m91dx8n1/detail.html

modules/imgcodecs/src/grfmt_tiff.cpp

@@ -574,13 +574,19 @@ bool  TiffEncoder::writeLibTiff( const Mat& img, const std::vector<int>& params)
       || !TIFFSetField(pTiffHandle, TIFFTAG_SAMPLESPERPIXEL, channels)
       || !TIFFSetField(pTiffHandle, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG)
       || !TIFFSetField(pTiffHandle, TIFFTAG_ROWSPERSTRIP, rowsPerStrip)
-      || !TIFFSetField(pTiffHandle, TIFFTAG_PREDICTOR, predictor)
+//      || !TIFFSetField(pTiffHandle, TIFFTAG_PREDICTOR, predictor)
        )
     {
         TIFFClose(pTiffHandle);
         return false;
     }
 
+    if (compression != COMPRESSION_NONE && !TIFFSetField(pTiffHandle, TIFFTAG_PREDICTOR, predictor) ) 
+    { 
+        TIFFClose(pTiffHandle); 
+        return false; 
+    }
+
     // row buffer, because TIFFWriteScanline modifies the original data!
     size_t scanlineSize = TIFFScanlineSize(pTiffHandle);
     AutoBuffer<uchar> _buffer(scanlineSize+32);