Struct nannou::image::imageops::BiLevel [−][src]
pub struct BiLevel;
A bi-level color map
Examples
use image::imageops::colorops::{index_colors, BiLevel, ColorMap}; use image::{ImageBuffer, Luma}; let (w, h) = (16, 16); // Create an image with a smooth horizontal gradient from black (0) to white (255). let gray = ImageBuffer::from_fn(w, h, |x, y| -> Luma<u8> { [(255 * x / w) as u8].into() }); // Mapping the gray image through the `BiLevel` filter should map gray pixels less than half // intensity (127) to black (0), and anything greater to white (255). let cmap = BiLevel; let palletized = index_colors(&gray, &cmap); let mapped = ImageBuffer::from_fn(w, h, |x, y| { let p = palletized.get_pixel(x, y); cmap.lookup(p.0[0] as usize) .expect("indexed color out-of-range") }); // Create an black and white image of expected output. let bw = ImageBuffer::from_fn(w, h, |x, y| -> Luma<u8> { if x <= (w / 2) { [0].into() } else { [255].into() } }); assert_eq!(mapped, bw);
Trait Implementations
impl Clone for BiLevel
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impl ColorMap for BiLevel
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type Color = Luma<u8>
The color type on which the map operates on
pub fn index_of(&self, color: &Luma<u8>) -> usize
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pub fn lookup(&self, idx: usize) -> Option<<BiLevel as ColorMap>::Color>
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pub fn has_lookup(&self) -> bool
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Indicate NeuQuant implements lookup
.
pub fn map_color(&self, color: &mut Luma<u8>)
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impl Copy for BiLevel
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Auto Trait Implementations
impl RefUnwindSafe for BiLevel
impl Send for BiLevel
impl Sync for BiLevel
impl Unpin for BiLevel
impl UnwindSafe for BiLevel
Blanket Implementations
impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for S where
T: Component + Float,
D: AdaptFrom<S, Swp, Dwp, T>,
Swp: WhitePoint,
Dwp: WhitePoint,
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T: Component + Float,
D: AdaptFrom<S, Swp, Dwp, T>,
Swp: WhitePoint,
Dwp: WhitePoint,
pub fn adapt_into_using<M>(self, method: M) -> D where
M: TransformMatrix<Swp, Dwp, T>,
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M: TransformMatrix<Swp, Dwp, T>,
pub fn adapt_into(self) -> D
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T, U> ConvertInto<U> for T where
U: ConvertFrom<T>,
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U: ConvertFrom<T>,
pub fn convert_into(self) -> U
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pub fn convert_unclamped_into(self) -> U
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pub fn try_convert_into(self) -> Result<U, OutOfBounds<U>>
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impl<T> Downcast<T> for T
impl<T> From<T> for T
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impl<T> Instrument for T
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pub fn instrument(self, span: Span) -> Instrumented<Self>
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pub fn in_current_span(self) -> Instrumented<Self>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> Pointable for T
pub const ALIGN: usize
type Init = T
The type for initializers.
pub unsafe fn init(init: <T as Pointable>::Init) -> usize
pub unsafe fn deref<'a>(ptr: usize) -> &'a T
pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T
pub unsafe fn drop(ptr: usize)
impl<T> SetParameter for T
pub fn set<T>(&mut self, value: T) -> <T as Parameter<Self>>::Result where
T: Parameter<Self>,
T: Parameter<Self>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Upcast<T> for T
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,