Struct Histogram 

pub struct Histogram {
    pub red: [u32; 256],
    pub green: [u32; 256],
    pub blue: [u32; 256],
    pub luminance: [u32; 256],
}

Image histogram

Fields

red: [u32; 256]

Red channel histogram

green: [u32; 256]

Green channel histogram

blue: [u32; 256]

Blue channel histogram

luminance: [u32; 256]

Luminance histogram

Implementations

impl Histogram

pub const fn new() -> Self

Creates a new empty histogram

pub fn from_rgba(data: &[u8], width: u32, height: u32) -> WasmResult<Self>

Computes histogram from RGBA data

pub fn min_value(&self) -> u8

Returns the minimum value with non-zero count

pub fn max_value(&self) -> u8

Returns the maximum value with non-zero count

pub fn mean(&self) -> f64

Returns the mean luminance

pub fn median(&self) -> u8

Returns the median luminance

impl Histogram

pub fn std_dev(&self) -> f64

Returns the standard deviation of luminance values

pub fn to_json(&self, width: u32, height: u32) -> HistogramJson

Converts the histogram to JSON-serializable format

pub fn to_json_string(&self, width: u32, height: u32) -> Result<String, Error>

Serializes the histogram to a JSON string

pub fn from_rgba_with_bins( data: &[u8], width: u32, height: u32, bin_edges: &[f64], ) -> WasmResult<CustomBinHistogramJson>

Creates a histogram with custom bin ranges from RGBA data

This allows for non-uniform bin widths, useful for specific analysis needs.

Trait Implementations

impl Clone for Histogram

fn clone(&self) -> Histogram

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Histogram

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

Formats the value using the given formatter.

impl Default for Histogram

fn default() -> Self

Returns the “default value” for a type.