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added description of LATCH and fixed indentation

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pull/231/head
GilLevi 10 years ago
parent 292cee6012
commit e2dfa35745
2 changed files with 982 additions and 969 deletions
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  1. 13
      modules/xfeatures2d/include/opencv2/xfeatures2d.hpp
  2. 18
      modules/xfeatures2d/src/latch.cpp

13
modules/xfeatures2d/include/opencv2/xfeatures2d.hpp
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@ -152,6 +152,19 @@ public:
/** 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.
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
*/
class CV_EXPORTS LATCHDescriptorExtractor : public DescriptorExtractor
{

18
modules/xfeatures2d/src/latch.cpp
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@ -90,7 +90,7 @@ protected:
{
return makePtr<LATCHDescriptorExtractorImpl>(bytes, rotationInvariance, half_ssd_size);
}
void CacluateSums(int count, const std::vector<int> &points, bool rotationInvariance, const Mat &grayImage, const KeyPoint &pt, int &suma, int &sumc, float cos_theta, float sin_theta, int half_ssd_size);
void CalcuateSums(int count, const std::vector<int> &points, bool rotationInvariance, const Mat &grayImage, const KeyPoint &pt, int &suma, int &sumc, float cos_theta, float sin_theta, int half_ssd_size);
static void pixelTests1(const Mat& grayImage, const std::vector<KeyPoint>& keypoints, OutputArray _descriptors, const std::vector<int> &points, bool rotationInvariance, int half_ssd_size)
@ -114,7 +114,7 @@ static void pixelTests1(const Mat& grayImage, const std::vector<KeyPoint>& keypo
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -145,7 +145,7 @@ static void pixelTests2(const Mat& grayImage, const std::vector<KeyPoint>& keypo
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -176,7 +176,7 @@ static void pixelTests4(const Mat& grayImage, const std::vector<KeyPoint>& keypo
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -208,7 +208,7 @@ static void pixelTests8(const Mat& grayImage, const std::vector<KeyPoint>& keypo
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -239,7 +239,7 @@ static void pixelTests16(const Mat& grayImage, const std::vector<KeyPoint>& keyp
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -269,7 +269,7 @@ static void pixelTests32(const Mat& grayImage, const std::vector<KeyPoint>& keyp
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -300,7 +300,7 @@ static void pixelTests64(const Mat& grayImage, const std::vector<KeyPoint>& keyp
int suma = 0;
int sumc = 0;
CacluateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
CalcuateSums(count, points, rotationInvariance, grayImage, pt, suma, sumc, cos_theta, sin_theta, half_ssd_size);
desc[ix] += (uchar)((suma < sumc) << j);
count += 6;
@ -309,7 +309,7 @@ static void pixelTests64(const Mat& grayImage, const std::vector<KeyPoint>& keyp
}
}
void CacluateSums(int count, const std::vector<int> &points, bool rotationInvariance, const Mat &grayImage, const KeyPoint &pt, int &suma, int &sumc, float cos_theta, float sin_theta, int half_ssd_size)
void CalcuateSums(int count, const std::vector<int> &points, bool rotationInvariance, const Mat &grayImage, const KeyPoint &pt, int &suma, int &sumc, float cos_theta, float sin_theta, int half_ssd_size)
{
int ax = points[count];

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