Struct light_curve_feature::features::OtsuSplit

pub struct OtsuSplit {}

Otsu threshholding algorithm

Difference of subset means, standard deviation of the lower subset, standard deviation of the upper subset and lower-to-all observation count ratio for two subsets of magnitudes obtained by Otsu’s method split. Otsu’s method is used to perform automatic thresholding. The algorithm returns a single threshold that separate values into two classes. This threshold is determined by minimizing intra-class intensity variance, or equivalently, by maximizing inter-class variance. The algorithm returns the minimum threshold which corresponds to the absolute maximum of the inter-class variance.

• Depends on: magnitude
• Minimum number of observations: 2
• Number of features: 4

Otsu, Nobuyuki 1979. DOI:10.1109/tsmc.1979.4310076

Implementations

impl OtsuSplit

pub fn new() -> Self

pub fn doc() -> &'static str

pub fn threshold<'a, 'b, T>( ds: &'b mut DataSample<'a, T> ) -> Result<(T, ArrayView1<'b, T>, ArrayView1<'b, T>), EvaluatorError>where T: Float, 'a: 'b,

Trait Implementations

impl Clone for OtsuSplit

fn clone(&self) -> OtsuSplit

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for OtsuSplit

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for OtsuSplit

fn default() -> OtsuSplit

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for OtsuSplit

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl EvaluatorInfoTrait for OtsuSplit

fn get_info(&self) -> &EvaluatorInfo

Get feature evaluator meta-information

fn size_hint(&self) -> usize

Size of vectors returned by eval(), get_names() and get_descriptions()

fn min_ts_length(&self) -> usize

Minimum time series length required to successfully evaluate feature

fn is_t_required(&self) -> bool

If time array used by the feature

fn is_m_required(&self) -> bool

If magnitude array is used by the feature

fn is_w_required(&self) -> bool

If weight array is used by the feature

fn is_sorting_required(&self) -> bool

If feature requires time-sorting on the input TimeSeries

impl<T> FeatureEvaluator<T> for OtsuSplitwhere T: Float,

fn eval(&self, ts: &mut TimeSeries<'_, T>) -> Result<Vec<T>, EvaluatorError>

Vector of feature values or EvaluatorError

fn eval_or_fill(&self, ts: &mut TimeSeries<'_, T>, fill_value: T) -> Vec<T>

Returns vector of feature values and fill invalid components with given value

fn check_ts_length( &self, ts: &TimeSeries<'_, T> ) -> Result<usize, EvaluatorError>

Checks if TimeSeries has enough points to evaluate the feature

impl FeatureNamesDescriptionsTrait for OtsuSplit

fn get_names(&self) -> Vec<&str>

Vector of feature names. The length and feature order corresponds to eval() output

fn get_descriptions(&self) -> Vec<&str>

Vector of feature descriptions. The length and feature order corresponds to eval() output

impl<T> From<OtsuSplit> for Feature<T>where T: Float,

fn from(v: OtsuSplit) -> Feature<T>

Converts to this type from the input type.

impl JsonSchema for OtsuSplit

fn schema_name() -> String

The name of the generated JSON Schema.

fn json_schema(gen: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl Serialize for OtsuSplit

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T> TryInto<OtsuSplit> for Feature<T>where T: Float,

type Error = &'static str

The type returned in the event of a conversion error.

fn try_into(self) -> Result<OtsuSplit, <Self as TryInto<OtsuSplit>>::Error>

Performs the conversion.