Enum img_hash::FilterType[][src]

pub enum FilterType {
    Nearest,
    Triangle,
    CatmullRom,
    Gaussian,
    Lanczos3,
}

Available Sampling Filters.

Examples

To test the different sampling filters on a real example, you can find two examples called scaledown and scaleup in the examples directory of the crate source code.

Here is a 3.58 MiB test image that has been scaled down to 300x225 px:


Nearest Neighbor

Linear: Triangle

Cubic: Catmull-Rom

Gaussian

Lanczos with window 3

Speed

Time required to create each of the examples above, tested on an Intel i7-4770 CPU with Rust 1.37 in release mode:

Nearest 31 ms
Triangle 414 ms
CatmullRom 817 ms
Gaussian 1180 ms
Lanczos3 1170 ms

Variants

Nearest

Nearest Neighbor

Triangle

Linear Filter

CatmullRom

Cubic Filter

Gaussian

Gaussian Filter

Lanczos3

Lanczos with window 3

Trait Implementations

impl Clone for FilterType[src]

impl Copy for FilterType[src]

impl Debug for FilterType[src]

impl PartialEq<FilterType> for FilterType[src]

impl StructuralPartialEq for FilterType[src]

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> ToOwned for T where
    T: Clone
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type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

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