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//
// KeyPoint.h
//
// Created by Giles Payne on 2019/10/08.
//
#pragma once
#ifdef __cplusplus
#import "opencv2/core.hpp"
#else
#define CV_EXPORTS
#endif
#import <Foundation/Foundation.h>
@class Point2f;
NS_ASSUME_NONNULL_BEGIN
/**
* Object representing a point feature found by one of many available keypoint detectors, such as Harris corner detector, FAST, StarDetector, SURF, SIFT etc.
*/
CV_EXPORTS @interface KeyPoint : NSObject
#pragma mark - Properties
/**
* Coordinates of the keypoint.
*/
@property Point2f* pt;
/**
* Diameter of the useful keypoint adjacent area.
*/
@property float size;
/**
* Computed orientation of the keypoint (-1 if not applicable).
*/
@property float angle;
/**
* The response, by which the strongest keypoints have been selected. Can
* be used for further sorting or subsampling.
*/
@property float response;
/**
* Octave (pyramid layer), from which the keypoint has been extracted.
*/
@property int octave;
/**
* Object ID, that can be used to cluster keypoints by an object they
* belong to.
*/
@property int classId;
#ifdef __cplusplus
@property(readonly) cv::KeyPoint& nativeRef;
#endif
#pragma mark - Constructors
- (instancetype)init;
- (instancetype)initWithX:(float)x y:(float)y size:(float)size angle:(float)angle response:(float)response octave:(int)octave classId:(int)classId;
- (instancetype)initWithX:(float)x y:(float)y size:(float)size angle:(float)angle response:(float)response octave:(int)octave;
- (instancetype)initWithX:(float)x y:(float)y size:(float)size angle:(float)angle response:(float)response;
- (instancetype)initWithX:(float)x y:(float)y size:(float)size angle:(float)angle;
- (instancetype)initWithX:(float)x y:(float)y size:(float)size;
#ifdef __cplusplus
+ (instancetype)fromNative:(cv::KeyPoint&)keyPoint;
#endif
#pragma mark - Common Methods
/**
* Clone object
*/
- (KeyPoint*)clone;
/**
* Compare for equality
* @param other Object to compare
*/
- (BOOL)isEqual:(nullable id)other;
/**
* Calculate hash value for this object
*/
- (NSUInteger)hash;
/**
* Returns a string that describes the contents of the object
*/
- (NSString*)description;
@end
NS_ASSUME_NONNULL_END
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