Struct HistogramEqualizer 

pub struct HistogramEqualizer {
    pub use_parallel: bool,
}

Histogram equalization algorithms for 8-bit luma images.

Fields

use_parallel: bool

When true, tile processing in CLAHE runs in parallel via rayon.

Implementations

impl HistogramEqualizer

pub fn new() -> Self

Construct a new equalizer with parallel processing enabled.

pub fn equalize_luma(frame: &[u8], width: u32, height: u32) -> Vec<u8>

Apply global histogram equalization to a single-channel (luma) image.

If the frame contains a single unique value, the input is returned unchanged.

Arguments

• frame – packed 8-bit luma bytes, row-major.
• width / height – image dimensions (informational; total pixels is frame.len()).

pub fn equalize_luma_instance( &self, frame: &[u8], width: u32, height: u32, ) -> Vec<u8>

Instance method wrapping the static equalize_luma.

pub fn clahe( frame: &[u8], width: u32, height: u32, clip_limit: f32, tile_size: u32, ) -> Vec<u8>

Apply Contrast Limited Adaptive Histogram Equalization.

The image is partitioned into a tile_size × tile_size grid. Each tile’s histogram is clipped at clip_limit, redistributed, and used to derive a local look-up table. Each output pixel is produced by bilinear interpolation of the four surrounding tile LUTs.

Arguments

• frame – packed 8-bit luma bytes, row-major.
• width / height – image dimensions.
• clip_limit – histogram clip ratio; 1.0 = fully clipped (equivalent to global equalization), larger values allow more local contrast.
• tile_size – tile edge length in pixels.

pub fn clahe_instance( &self, frame: &[u8], width: u32, height: u32, clip_limit: f32, tile_size: u32, ) -> Vec<u8>

Instance method wrapping the static clahe.

Trait Implementations

impl Clone for HistogramEqualizer

fn clone(&self) -> HistogramEqualizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistogramEqualizer

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

Formats the value using the given formatter.

impl Default for HistogramEqualizer

fn default() -> HistogramEqualizer

Returns the “default value” for a type.