diff --git a/SceneImage.cpp b/SceneImage.cpp
index fbeee92..37b5043 100644
--- a/SceneImage.cpp
+++ b/SceneImage.cpp
@@ -128,26 +128,28 @@ Scene::GetImage( int nShowMode, Color colBackTop, Color colBackBottom,
    pDib = FreeImage_ConvertTo24Bits( pTmpDib) ;
    FreeImage_Unload( pTmpDib) ;
 
-  // Eseguo scalatura della bitmap
-   int nLeft ; int nTop ;
-   int nRight ; int nBottom ;
-   if ( dCoeffW / nN >= dCoeffH / nM) {
-      nLeft = 0 ;
-      nRight = nN * nWidth - 1 ;
-      int nDeltaH = nM * nHeight - nN * int( nDestHeight / dCoeffW) ;
-      nTop = nDeltaH / 2 ;
-      nBottom = nM * nHeight - nTop - 1 ; 
+  // Se necessario, eseguo scalatura della bitmap
+   if ( nDestWidth != nN * nWidth  ||  nDestHeight != nM * nHeight) {
+      int nLeft ; int nTop ;
+      int nRight ; int nBottom ;
+      if ( dCoeffW / nN >= dCoeffH / nM) {
+         nLeft = 0 ;
+         nRight = nN * nWidth - 1 ;
+         int nDeltaH = nM * nHeight - nN * int( nDestHeight / dCoeffW) ;
+         nTop = nDeltaH / 2 ;
+         nBottom = nM * nHeight - nTop - 1 ; 
+      }
+      else {
+         nTop = 0 ;
+         nBottom = nM * nHeight - 1 ; 
+         int nDeltaW = nN * nWidth - nM * int( nDestWidth / dCoeffH) ;
+         nLeft = nDeltaW / 2 ;
+         nRight = nN * nWidth - nLeft - 1 ;
+      }
+      FIBITMAP* pTmp2Dib = pDib ;
+      pDib = FreeImage_RescaleRect( pTmp2Dib, nDestWidth, nDestHeight, nLeft, nTop, nRight, nBottom, FILTER_CATMULLROM) ;
+      FreeImage_Unload( pTmp2Dib) ;
    }
-   else {
-      nTop = 0 ;
-      nBottom = nM * nHeight - 1 ; 
-      int nDeltaW = nN * nWidth - nM * int( nDestWidth / dCoeffH) ;
-      nLeft = nDeltaW / 2 ;
-      nRight = nN * nWidth - nLeft - 1 ;
-   }
-   FIBITMAP* pTmp2Dib = pDib ;
-   pDib = FreeImage_RescaleRect( pTmp2Dib, nDestWidth, nDestHeight, nLeft, nTop, nRight, nBottom, FILTER_BSPLINE) ;
-   FreeImage_Unload( pTmp2Dib) ;
 
   // Salvataggio
    int nFlag = 0 ;