public String getTypeDescription(File f) {
	    String extension = Outils.getExtension(f);
	    String type = null;

	    if (extension != null) {
	        if (extension.equals(Outils.jpeg) ||
	            extension.equals(Outils.jpg)) {
	            type = "Image JPEG";
	        } else if (extension.equals(Outils.gif)){
	            type = "Image GIF";
	        } else if (extension.equals(Outils.tiff) ||
	                   extension.equals(Outils.tif)) {
	            type = "Image TIFF";
	        } else if (extension.equals(Outils.png)){
	            type = "Image PNG";
	        } else if (extension.equals(Outils.bmp)){
	            type = "Image BMP";}
	    }
	    return type;
	}