Struct opencv::xfeatures2d::FREAK

pub struct FREAK { /* fields omitted */ }

Class implementing the FREAK (Fast Retina Keypoint) keypoint descriptor, described in AOV12 .

The algorithm propose a novel keypoint descriptor inspired by the human visual system and more precisely the retina, coined Fast Retina Key- point (FREAK). A cascade of binary strings is computed by efficiently comparing image intensities over a retinal sampling pattern. FREAKs are in general faster to compute with lower memory load and also more robust than SIFT, SURF or BRISK. They are competitive alternatives to existing keypoints in particular for embedded applications.

Note:

• An example on how to use the FREAK descriptor can be found at opencv_source_code/samples/cpp/freak_demo.cpp

Methods

impl FREAK

pub fn as_raw_FREAK(&self) -> *mut c_void

pub unsafe fn from_raw_ptr(ptr: *mut c_void) -> Self

impl FREAK

pub fn create(
    orientation_normalized: bool,
    scale_normalized: bool,
    pattern_scale: f32,
    n_octaves: i32,
    selected_pairs: &VectorOfint
) -> Result<PtrOfFREAK>

Parameters

• orientationNormalized: Enable orientation normalization.
• scaleNormalized: Enable scale normalization.
• patternScale: Scaling of the description pattern.
• nOctaves: Number of octaves covered by the detected keypoints.
• selectedPairs: (Optional) user defined selected pairs indexes,

C++ default parameters

• orientation_normalized: true
• scale_normalized: true
• pattern_scale: 22.0f
• n_octaves: 4
• selected_pairs: std::vector()

Trait Implementations

impl AlgorithmTrait for FREAK

fn as_raw_Algorithm(&self) -> *mut c_void

fn clear(&mut self) -> Result<()>

Clears the algorithm state

fn write(&self, fs: &mut FileStorage) -> Result<()>

Stores algorithm parameters in a file storage

fn write_1(&self, fs: &PtrOfFileStorage, name: &str) -> Result<()>

simplified API for language bindings

fn read(&mut self, _fn: &FileNode) -> Result<()>

Reads algorithm parameters from a file storage

fn empty(&self) -> Result<bool>

Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read

fn save(&self, filename: &str) -> Result<()>

Saves the algorithm to a file. In order to make this method work, the derived class must implement Algorithm::write(FileStorage& fs).

fn get_default_name(&self) -> Result<String>

Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.

impl Drop for FREAK

fn drop(&mut self)

Executes the destructor for this type.

impl Send for FREAK