Package org.opencv.xfeatures2d

Class FREAK

  • public class FREAK
extends Feature2D
    Class implementing the FREAK (*Fast Retina Keypoint*) keypoint descriptor, described in CITE: AOV12 . The algorithm propose a novel keypoint descriptor inspired by the human visual system and more precisely the retina, coined Fast Retina Key- point (FREAK). A cascade of binary strings is computed by efficiently comparing image intensities over a retinal sampling pattern. FREAKs are in general faster to compute with lower memory load and also more robust than SIFT, SURF or BRISK. They are competitive alternatives to existing keypoints in particular for embedded applications. Note:
    • An example on how to use the FREAK descriptor can be found at opencv_source_code/samples/cpp/freak_demo.cpp

    • Constructor Detail

      • FREAK

        protected FREAK​(long addr)

    • Method Detail

      • __fromPtr__

        public static FREAK __fromPtr__​(long addr)

      • create

        public static FREAK create​(boolean orientationNormalized,
                           boolean scaleNormalized,
                           float patternScale,
                           int nOctaves,
                           MatOfInt selectedPairs)
        Parameters:
        orientationNormalized - Enable orientation normalization.
        scaleNormalized - Enable scale normalization.
        patternScale - Scaling of the description pattern.
        nOctaves - Number of octaves covered by the detected keypoints.
        selectedPairs - (Optional) user defined selected pairs indexes,
        Returns:
        automatically generated

      • create

        public static FREAK create​(boolean orientationNormalized,
                           boolean scaleNormalized,
                           float patternScale,
                           int nOctaves)
        Parameters:
        orientationNormalized - Enable orientation normalization.
        scaleNormalized - Enable scale normalization.
        patternScale - Scaling of the description pattern.
        nOctaves - Number of octaves covered by the detected keypoints.
        Returns:
        automatically generated

      • create

        public static FREAK create​(boolean orientationNormalized,
                           boolean scaleNormalized,
                           float patternScale)
        Parameters:
        orientationNormalized - Enable orientation normalization.
        scaleNormalized - Enable scale normalization.
        patternScale - Scaling of the description pattern.
        Returns:
        automatically generated

      • create

        public static FREAK create​(boolean orientationNormalized,
                           boolean scaleNormalized)
        Parameters:
        orientationNormalized - Enable orientation normalization.
        scaleNormalized - Enable scale normalization.
        Returns:
        automatically generated

      • create

        public static FREAK create​(boolean orientationNormalized)
        Parameters:
        orientationNormalized - Enable orientation normalization.
        Returns:
        automatically generated

      • create

        public static FREAK create()
        Returns:
        automatically generated

      • setOrientationNormalized

        public void setOrientationNormalized​(boolean orientationNormalized)

      • getOrientationNormalized

        public boolean getOrientationNormalized()

      • setScaleNormalized

        public void setScaleNormalized​(boolean scaleNormalized)

      • getScaleNormalized

        public boolean getScaleNormalized()

      • setPatternScale

        public void setPatternScale​(double patternScale)

      • getPatternScale

        public double getPatternScale()

      • setNOctaves

        public void setNOctaves​(int nOctaves)

      • getNOctaves

        public int getNOctaves()

      • getDefaultName

        public java.lang.String getDefaultName()
        Description copied from class: Algorithm
        Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.
        Overrides:
        getDefaultName in class Feature2D
        Returns:
        automatically generated

      • finalize

        protected void finalize()
                 throws java.lang.Throwable
        Overrides:
        finalize in class Feature2D
        Throws:
        java.lang.Throwable