Struct FourierCrop 

pub struct FourierCrop {
    pub start_row: usize,
    pub start_col: usize,
    pub height: usize,
    pub width: usize,
}

Integer rectangular region within a centered high-resolution Fourier array.

Fields

start_row: usize

Zero-based first row in the high-resolution spectrum.

start_col: usize

Zero-based first column in the high-resolution spectrum.

height: usize

Number of rows, normally equal to the low-resolution image height.

width: usize

Number of columns, normally equal to the low-resolution image width.

Implementations

impl FourierCrop

pub fn new( start_row: usize, start_col: usize, height: usize, width: usize, ) -> Self

Creates an unchecked integer crop; call Self::validate_inside before use.

pub fn validate_inside(&self, shape: (usize, usize)) -> Result<()>

Checks non-zero crop dimensions and containment in (height, width) shape.

pub fn extract<T: Copy>( &self, source: ArrayView2<'_, T>, destination: &mut [T], ) -> Result<()>

Extracts from a C-contiguous standard row-major view without copying the input. Nonstandard views are rejected.

pub fn validate_subpixel_inside( &self, shape: (usize, usize), offset: FourierOffset, ) -> Result<()>

Checks that a bilinear stencil for offset remains inside (height, width) shape.

pub fn extract_subpixel( &self, source: ArrayView2<'_, Complex64>, destination: &mut [Complex64], offset: FourierOffset, ) -> Result<()>

Bilinearly samples a potentially fractional crop from source.

This is a local Fourier-grid interpolation, not a bandlimited shift operator. Its approximation error grows with grid-frequency content and fractional displacement; low-bandwidth objects are the intended regime.

pub fn insert_subpixel_adjoint( &self, destination: ArrayViewMut2<'_, Complex64>, update: &[Complex64], scale: f64, offset: FourierOffset, ) -> Result<()>

Adds the exact adjoint of Self::extract_subpixel to destination.

Trait Implementations

impl Clone for FourierCrop

fn clone(&self) -> FourierCrop

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FourierCrop

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FourierCrop

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for FourierCrop

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for FourierCrop

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for FourierCrop

impl Eq for FourierCrop

impl StructuralPartialEq for FourierCrop