Package org.opencv.xfeatures2d

Class LATCH

java.lang.Object
org.opencv.core.Algorithm
org.opencv.features2d.Feature2D
org.opencv.xfeatures2d.LATCH
public class LATCH extends Feature2D
latch Class for computing the LATCH descriptor. If you find this code useful, please add a reference to the following paper in your work: Gil Levi and Tal Hassner, "LATCH: Learned Arrangements of Three Patch Codes", arXiv preprint arXiv:1501.03719, 15 Jan. 2015 LATCH is a binary descriptor based on learned comparisons of triplets of image patches. bytes is the size of the descriptor - can be 64, 32, 16, 8, 4, 2 or 1 rotationInvariance - whether or not the descriptor should compansate for orientation changes. half_ssd_size - the size of half of the mini-patches size. For example, if we would like to compare triplets of patches of size 7x7x then the half_ssd_size should be (7-1)/2 = 3. sigma - sigma value for GaussianBlur smoothing of the source image. Source image will be used without smoothing in case sigma value is 0. Note: the descriptor can be coupled with any keypoint extractor. The only demand is that if you use set rotationInvariance = True then you will have to use an extractor which estimates the patch orientation (in degrees). Examples for such extractors are ORB and SIFT. Note: a complete example can be found under /samples/cpp/tutorial_code/xfeatures2D/latch_match.cpp

  • Constructor Details

    • LATCH

      protected LATCH(long addr)

  • Method Details

    • __fromPtr__

      public static LATCH __fromPtr__(long addr)

    • create

      public static LATCH create(int bytes, boolean rotationInvariance, int half_ssd_size, double sigma)

    • create

      public static LATCH create(int bytes, boolean rotationInvariance, int half_ssd_size)

    • create

      public static LATCH create(int bytes, boolean rotationInvariance)

    • create

      public static LATCH create(int bytes)

    • create

      public static LATCH create()

    • setBytes

      public void setBytes(int bytes)

    • getBytes

      public int getBytes()

    • setRotationInvariance

      public void setRotationInvariance(boolean rotationInvariance)

    • getRotationInvariance

      public boolean getRotationInvariance()

    • setHalfSSDsize

      public void setHalfSSDsize(int half_ssd_size)

    • getHalfSSDsize

      public int getHalfSSDsize()

    • setSigma

      public void setSigma(double sigma)

    • getSigma

      public double getSigma()

    • getDefaultName

      public 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 Throwable
      Overrides:
      finalize in class Feature2D
      Throws:
      Throwable