Struct ScalarQuantizer4 

pub struct ScalarQuantizer4 {
    pub dimension: usize,
    pub min_values: Vec<f32>,
    pub ranges: Vec<f32>,
}

4-bit scalar quantizer

Maps float32 values to 4-bit [0, 15], achieving 8x compression.

Fields

dimension: usize

Vector dimension

min_values: Vec<f32>

Minimum value per dimension

ranges: Vec<f32>

Ranges per dimension

Implementations

impl ScalarQuantizer4

pub fn train(vectors: &[Vec<f32>]) -> Result<Self>

Train quantizer on a set of vectors

pub fn encode(&self, vector: &[f32]) -> Result<Vec<u8>>

Encode a vector to 4-bit representation (packed)

Each byte stores two 4-bit values

pub fn decode(&self, quantized: &[u8]) -> Result<Vec<f32>>

Decode 4-bit representation back to float32

pub fn memory_usage(&self, num_vectors: usize) -> usize

Memory footprint in bytes

Trait Implementations

impl Clone for ScalarQuantizer4

fn clone(&self) -> ScalarQuantizer4

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScalarQuantizer4

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ScalarQuantizer4

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ScalarQuantizer4

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

where __S: Serializer,

Serialize this value into the given Serde serializer.