Struct 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_with_extractor( dextractor: &Ptr<Feature2D>, dmatcher: &Ptr<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( dmatcher: &Ptr<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: &impl MatTraitConst) -> Result<()>

Sets a visual vocabulary.

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

Computes an image descriptor using the set visual vocabulary.

fn compute_desc_def( &mut self, image: &impl ToInputArray, keypoints: &mut Vector<KeyPoint>, img_descriptor: &mut impl ToOutputArray, ) -> Result<()>

Computes an image descriptor using the set visual vocabulary.

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

Computes an image descriptor using the set visual vocabulary.

fn compute_def( &mut self, keypoint_descriptors: &impl ToInputArray, img_descriptor: &mut impl ToOutputArray, ) -> Result<()>

@overload

fn compute2( &mut self, image: &impl MatTraitConst, keypoints: &mut Vector<KeyPoint>, img_descriptor: &mut impl MatTrait, ) -> 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: <BOWImgDescriptorExtractor as OpenCVFromExtern>::ExternReceive, ) -> Self

Wrap the specified raw pointer

fn into_raw( self, ) -> <BOWImgDescriptorExtractor as OpenCVTypeExternContainer>::ExternSendMut

Return the underlying raw pointer while consuming this wrapper.

fn as_raw( &self, ) -> <BOWImgDescriptorExtractor as OpenCVTypeExternContainer>::ExternSend

Return the underlying raw pointer.

fn as_raw_mut( &mut self, ) -> <BOWImgDescriptorExtractor as OpenCVTypeExternContainer>::ExternSendMut

Return the underlying mutable raw pointer

impl Debug for BOWImgDescriptorExtractor

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

Formats the value using the given formatter.

impl Drop for BOWImgDescriptorExtractor

fn drop(&mut self)

Executes the destructor for this type.

impl Send for BOWImgDescriptorExtractor