reader_params.SetValueAsString( "PixelType", pixel_type );
reader_params.SetValueAsUint( "ImageDimension", dimensions );
reader_params.SetValueAsUint( "IsColorImage", ( is_color? 1: 0 ) );
reader_params.SetValueAsString( "PixelType", pixel_type );
reader_params.SetValueAsUint( "ImageDimension", dimensions );
reader_params.SetValueAsUint( "IsColorImage", ( is_color? 1: 0 ) );