ScalarQuantizer

edgevec::quantization::scalar

Struct ScalarQuantizer 

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pub struct ScalarQuantizer { /* private fields */ }
Expand description

Scalar Quantizer implementation using global min/max normalization.

Maps f32 values to u8 in the range [0, 255]. Values outside [min, max] are clamped.

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impl ScalarQuantizer

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pub fn new(config: QuantizerConfig) -> Self

Create a new quantizer with specific config.

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

Train the quantizer on a batch of vectors to find global min/max.

§Arguments
  • vectors - Slice of vectors (slices of f32)
§Returns

A new ScalarQuantizer initialized with the observed range.

§Edge Cases
  • If vectors is empty, returns default 0.0..1.0 range.
  • If all values are equal (min == max), returns that value as both min and max.
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pub fn quantize(&self, vector: &[f32]) -> Vec<u8> ⓘ

Quantize a vector from f32 to u8.

§Formula

u8 = (val - min) / (max - min) * 255

§Behavior
  • Outliers (val < min or val > max) are clamped.
  • NaN values are treated as min (0).
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pub fn dequantize(&self, quantized: &[u8]) -> Vec<f32>

Reconstruct f32 vector from quantized u8.

§Formula

f32 = min + (u8 / 255) * (max - min)

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pub fn config(&self) -> QuantizerConfig

Get the configuration.

Trait Implementations§

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impl Clone for ScalarQuantizer

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fn clone(&self) -> ScalarQuantizer

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ScalarQuantizer

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

Formats the value using the given formatter. Read more

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