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LaplacianSolver

qsm_core::unwrap::laplacian

Enum LaplacianSolver 

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pub enum LaplacianSolver {
    Dct,
    Fft {
        pad: [usize; 3],
    },
    Mirror,
}
Expand description

Poisson solver for laplacian_unwrap (names as in QSM.jl’s unwrap_laplacian).

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Dct

Unweighted least squares (Ghiglia & Romero 1994): finite differences of wrapped neighbour differences, Poisson solve under a Neumann condition via DCT. Matches QSM.jl :dct. The default.

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Fft

Schofield & Zhu (2003): ∇²φ from the sin/cos identity with spectral derivatives, FFT Poisson solve on the volume zero-padded by pad voxels per side. Reproduces STI Suite 3.0’s MRPhaseUnwrap with padsize = pad (its default is 12; UK Biobank uses 64).

Fields

§pad: [usize; 3]

Zero-padding added to both sides of each axis, in voxels.

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Mirror

Schofield & Zhu (2003) as Hongfu Sun’s lapunwrap.m does it (QSMART’s Laplacian unwrapping): ∇²φ from the sin/cos identity with spectral derivatives and an FFT Poisson solve, on the volume mirrored to twice its size along each axis (so no seam at the edge) rather than zero-padded. DC → 0 (lapunwrap.m divides it by eps, a constant that depends only on rounding).

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impl LaplacianSolver

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pub const FFT_DEFAULT_PAD: LaplacianSolver

LaplacianSolver::Fft with STI Suite’s default padding, 12 voxels per side.

Trait Implementations§

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impl Clone for LaplacianSolver

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fn clone(&self) -> LaplacianSolver

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for LaplacianSolver

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impl Debug for LaplacianSolver

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

Formats the value using the given formatter. Read more
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impl Default for LaplacianSolver

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fn default() -> LaplacianSolver

Returns the “default value” for a type. Read more
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impl Eq for LaplacianSolver

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impl PartialEq for LaplacianSolver

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fn eq(&self, other: &LaplacianSolver) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl Serialize for LaplacianSolver

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for LaplacianSolver

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneAny for T
where T: Any + Clone,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Converts Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>, which can then be downcast into Box<dyn ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Converts Rc<Trait> (where Trait: Downcast) to Rc<Any>, which can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Converts &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Converts &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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where T: Any + Send,

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fn into_any_send(self: Box<T>) -> Box<dyn Any + Send>

Converts Box<Trait> (where Trait: DowncastSend) to Box<dyn Any + Send>, which can then be downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn __clone_box(&self, _: Private) -> *mut ()

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fn as_any(&self) -> &(dyn Any + 'static)

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fn dyn_eq(&self, other: &(dyn Any + 'static)) -> bool

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize

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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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type Output = T

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fn erased_serialize(&self, serializer: &mut dyn Serializer) -> Result<(), Error>

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type Owned = T

The resulting type after obtaining ownership.
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