| cv.ORB - MATLAB File Help | Go to online doc for cv.ORB |
Class implementing the ORB (oriented BRIEF) keypoint detector and descriptor extractor
As described in [RRKB11]. The algorithm uses FAST in pyramids to detect stable keypoints, selects the strongest features using FAST or Harris response, finds their orientation using first-order moments and computes the descriptors using BRIEF (where the coordinates of random point pairs (or k-tuples) are rotated according to the measured orientation).
[RRKB11]:
Ethan Rublee, Vincent Rabaud, Kurt Konolige, and Gary Bradski. "ORB: An efficient alternative to SIFT or SURF". In IEEE International Conference on Computer Vision (ICCV) 2011, pages 2564-2571. IEEE, 2011.
| Superclasses | handle |
| Sealed | false |
| Construct on load | false |
| ORB | The ORB constructor |
| EdgeThreshold | This is size of the border where the features are not detected. |
| FastThreshold | Threshold on difference between intensity of the central pixel |
| FirstLevel | The level of pyramid to put source image to. Previous layers are |
| MaxFeatures | The maximum number of features to retain. |
| NLevels | The number of pyramid levels. |
| PatchSize | Size of the patch used by the oriented BRIEF descriptor. |
| ScaleFactor | Pyramid decimation ratio. |
| ScoreType | Algorithm used to rank features. |
| WTA_K | The number of points that produce each element of the oriented BRIEF |
| id | Object ID |
| addlistener | Add listener for event. | |
| clear | Clears the algorithm state | |
| compute | Computes the descriptors for a set of keypoints detected in an image or image set | |
| defaultNorm | Returns the default norm type | |
| delete | Destructor | |
| descriptorSize | Returns the descriptor size in bytes | |
| descriptorType | Returns the descriptor type | |
| detect | Detects keypoints in an image or image set | |
| detectAndCompute | Finds keypoints in an image and computes their descriptors | |
| empty | Checks if detector object is empty | |
| eq | == (EQ) Test handle equality. | |
| findobj | Find objects matching specified conditions. | |
| findprop | Find property of MATLAB handle object. | |
| ge | >= (GE) Greater than or equal relation for handles. | |
| getDefaultName | Returns the algorithm string identifier | |
| gt | > (GT) Greater than relation for handles. | |
| Sealed | isvalid | Test handle validity. |
| le | <= (LE) Less than or equal relation for handles. | |
| listener | Add listener for event without binding the listener to the source object. | |
| load | Loads algorithm from a file or a string | |
| lt | < (LT) Less than relation for handles. | |
| ne | ~= (NE) Not equal relation for handles. | |
| notify | Notify listeners of event. | |
| save | Saves the algorithm parameters to a file | |
| typeid | Name of the C++ type (RTTI) |
| ObjectBeingDestroyed | Notifies listeners that a particular object has been destroyed. |