question: apply the luminance concode_field_sep PlaceHolder placeHolder concode_field_sep AndroidImage process concode_elem_sep int truncate
target: int function ( int arg0 , int arg1 , int arg2 ) { return ( int ) ( ( 0.299 * arg0 ) + ( 0.58 * arg1 ) + ( 0.11 * arg2 ) ) ; }