concept PixelBasedConcept<typename T> {
typename color_space_type<T>;
where Metafunction<color_space_type<T> >;
where ColorSpaceConcept<color_space_type<T>::type>;
typename channel_mapping_type<T>;
where Metafunction<channel_mapping_type<T> >;
where ChannelMappingConcept<channel_mapping_type<T>::type>;
typename is_planar<T>;
where Metafunction<is_planar<T> >;
where SameType<is_planar<T>::type, bool>;
};