Struct ImageHistogram 

pub struct ImageHistogram {
    pub channels: Vec<ChannelHistogram>,
    pub width: u32,
    pub height: u32,
}

Multi-channel image histogram.

Fields

channels: Vec<ChannelHistogram>

Per-channel histogram data.

width: u32

Image width in pixels.

height: u32

Image height in pixels.

Implementations

impl ImageHistogram

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

Compute a histogram for a packed RGB or RGBA image.

The number of channels is inferred from data.len() / (width * height). For standard packed RGB use 3 channels; for RGBA use 4.

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

Compute a histogram for a single-channel (grayscale) image.

pub fn is_underexposed(&self) -> bool

Return true if any channel has a mean below 64 (underexposed).

pub fn is_overexposed(&self) -> bool

Return true if any channel has a mean above 192 (overexposed).

pub fn dominant_channel(&self) -> u8

Return the index of the channel with the highest mean pixel value.

Trait Implementations

impl Clone for ImageHistogram

fn clone(&self) -> ImageHistogram

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ImageHistogram

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

Formats the value using the given formatter.