Struct opencv::features2d::BOWImgDescriptorExtractor

pub struct BOWImgDescriptorExtractor { /* private fields */ }

Class to compute an image descriptor using the bag of visual words.

Such a computation consists of the following steps:

1. Compute descriptors for a given image and its keypoints set.
2. Find the nearest visual words from the vocabulary for each keypoint descriptor.
3. Compute the bag-of-words image descriptor as is a normalized histogram of vocabulary words encountered in the image. The i-th bin of the histogram is a frequency of i-th word of the vocabulary in the given image.

Implementations

impl BOWImgDescriptorExtractor

pub fn new(
    dextractor: &Ptr<Feature2D>,
    dmatcher: &Ptr<dyn DescriptorMatcher>
) -> Result<BOWImgDescriptorExtractor>

The constructor.

Parameters

• dextractor: Descriptor extractor that is used to compute descriptors for an input image and its keypoints.
• dmatcher: Descriptor matcher that is used to find the nearest word of the trained vocabulary for each keypoint descriptor of the image.

pub fn new_1(
    dmatcher: &Ptr<dyn DescriptorMatcher>
) -> Result<BOWImgDescriptorExtractor>

The constructor.

Parameters

• dextractor: Descriptor extractor that is used to compute descriptors for an input image and its keypoints.
• dmatcher: Descriptor matcher that is used to find the nearest word of the trained vocabulary for each keypoint descriptor of the image.

Overloaded parameters

Trait Implementations

impl BOWImgDescriptorExtractorTrait for BOWImgDescriptorExtractor

fn as_raw_mut_BOWImgDescriptorExtractor(&mut self) -> *mut c_void

fn set_vocabulary(&mut self, vocabulary: &Mat) -> Result<()>

Sets a visual vocabulary.

fn compute_desc(
    &mut self,
    image: &dyn ToInputArray,
    keypoints: &mut Vector<KeyPoint>,
    img_descriptor: &mut dyn ToOutputArray,
    point_idxs_of_clusters: &mut Vector<Vector<i32>>,
    descriptors: &mut Mat
) -> Result<()>

Computes an image descriptor using the set visual vocabulary.

fn compute(
    &mut self,
    keypoint_descriptors: &dyn ToInputArray,
    img_descriptor: &mut dyn ToOutputArray,
    point_idxs_of_clusters: &mut Vector<Vector<i32>>
) -> Result<()>

Computes an image descriptor using the set visual vocabulary.

fn compute2(
    &mut self,
    image: &Mat,
    keypoints: &mut Vector<KeyPoint>,
    img_descriptor: &mut Mat
) -> Result<()>

impl BOWImgDescriptorExtractorTraitConst for BOWImgDescriptorExtractor

fn as_raw_BOWImgDescriptorExtractor(&self) -> *const c_void

fn get_vocabulary(&self) -> Result<Mat>

Returns the set vocabulary.

fn descriptor_size(&self) -> Result<i32>

Returns an image descriptor size if the vocabulary is set. Otherwise, it returns 0.

fn descriptor_type(&self) -> Result<i32>

Returns an image descriptor type.

impl Boxed for BOWImgDescriptorExtractor

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

Wrap the specified raw pointer

fn into_raw(self) -> *mut c_void

Return an the underlying raw pointer while consuming this wrapper.

fn as_raw(&self) -> *const c_void

Return the underlying raw pointer.

fn as_raw_mut(&mut self) -> *mut c_void

Return the underlying mutable raw pointer

impl Drop for BOWImgDescriptorExtractor

fn drop(&mut self)

Executes the destructor for this type.

impl Send for BOWImgDescriptorExtractor