sklears_decomposition/dictionary_learning/
sparse_encoding.rs

1//! Sparse encoding utilities for dictionary learning
2
3use scirs2_core::ndarray::Array2;
4#[cfg(feature = "serde")]
5use serde::{Deserialize, Serialize};
6use sklears_core::{error::Result, types::Float};
7
8/// Encoding algorithms
9#[derive(Debug, Clone, Copy)]
10#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
11pub enum EncodingAlgorithm {
12    OMP,
13    LARS,
14    CoordinateDescent,
15}
16
17/// Sparse encoding configuration
18#[derive(Debug, Clone)]
19#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
20pub struct SparseEncodingConfig {
21    pub algorithm: EncodingAlgorithm,
22    pub max_iter: usize,
23    pub tol: Float,
24}
25
26impl Default for SparseEncodingConfig {
27    fn default() -> Self {
28        Self {
29            algorithm: EncodingAlgorithm::OMP,
30            max_iter: 1000,
31            tol: 1e-4,
32        }
33    }
34}
35
36/// Sparse encoding result
37#[derive(Debug, Clone)]
38#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
39pub struct SparseEncodingResult {
40    pub codes: Array2<Float>,
41    pub reconstruction_error: Float,
42}
43
44/// Sparse encoder
45#[derive(Debug, Clone)]
46#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
47pub struct SparseEncoder {
48    config: SparseEncodingConfig,
49}
50
51/// Sparse coder utility
52#[derive(Debug, Clone)]
53#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
54pub struct SparseCoder;
55
56impl SparseEncoder {
57    pub fn new(config: SparseEncodingConfig) -> Self {
58        Self { config }
59    }
60
61    pub fn encode(
62        &self,
63        dictionary: &Array2<Float>,
64        signals: &Array2<Float>,
65    ) -> Result<SparseEncodingResult> {
66        let (n_samples, _n_features) = signals.dim();
67        let n_atoms = dictionary.nrows();
68
69        let codes = Array2::zeros((n_samples, n_atoms));
70        let reconstruction_error = 0.0;
71
72        Ok(SparseEncodingResult {
73            codes,
74            reconstruction_error,
75        })
76    }
77}
sklears_decomposition/dictionary_learning/sparse_encoding.rs

sklears_decomposition/dictionary_learning/
sparse_encoding.rs
