Merge pull request #1387 from terfendail:fast_extension

Author: vpisarev

modules/xfeatures2d/include/opencv2/xfeatures2d.hpp

@@ -925,6 +925,26 @@ class CV_EXPORTS AffineFeature2D : public Feature2D
         bool useProvidedKeypoints=false ) = 0;
 };
 
+
+/** @brief Estimates cornerness for prespecified KeyPoints using the FAST algorithm
+
+@param image grayscale image where keypoints (corners) are detected.
+@param keypoints keypoints which should be tested to fit the FAST criteria. Keypoints not beeing
+detected as corners are removed.
+@param threshold threshold on difference between intensity of the central pixel and pixels of a
+circle around this pixel.
+@param nonmaxSuppression if true, non-maximum suppression is applied to detected corners
+(keypoints).
+@param type one of the three neighborhoods as defined in the paper:
+FastFeatureDetector::TYPE_9_16, FastFeatureDetector::TYPE_7_12,
+FastFeatureDetector::TYPE_5_8
+
+Detects corners using the FAST algorithm by @cite Rosten06 .
+ */
+CV_EXPORTS void FASTForPointSet( InputArray image, CV_IN_OUT std::vector<KeyPoint>& keypoints,
+                      int threshold, bool nonmaxSuppression=true, int type=FastFeatureDetector::TYPE_9_16);
+
+
 //! @}
 
 }