From 9f15f251cafe40c1f1f7ad7d24dbe343f5a2db1e Mon Sep 17 00:00:00 2001
From: Josh Klontz <josh.klontz@gmail.com>
Date: Sun, 17 Mar 2013 21:48:33 -0400
Subject: [PATCH] implemented RootNorm transform

---
 sdk/plugins/algorithms.cpp |  2 +-
 sdk/plugins/normalize.cpp  | 24 ++++++++++++++++++++++++
 share/openbr/openbr.bib    |  8 ++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/sdk/plugins/algorithms.cpp b/sdk/plugins/algorithms.cpp
index 809e094..a46caad 100644
--- a/sdk/plugins/algorithms.cpp
+++ b/sdk/plugins/algorithms.cpp
@@ -42,7 +42,7 @@ class AlgorithmsInitializer : public Initializer
         Globals->abbreviations.insert("OpenBR", "FaceRecognition");
         Globals->abbreviations.insert("GenderEstimation", "GenderClassification");
         Globals->abbreviations.insert("AgeEstimation", "AgeRegression");
-        Globals->abbreviations.insert("FaceRecognitionHoG", "Open+Cvt(Gray)+Cascade(FrontalFace)+ASEFEyes+Affine(64,64,0.25,0.35)+Gradient+Bin(0,360,8,true)+Merge+Integral+IntegralSampler+ProductQuantization:ProductQuantization");
+        Globals->abbreviations.insert("FaceRecognitionHoG", "Open+Cvt(Gray)+Cascade(FrontalFace)+ASEFEyes+Affine(64,64,0.25,0.35)+Gradient+Bin(0,360,8,true)+Merge+Integral+IntegralSampler+RootNorm+ProductQuantization:ProductQuantization");
 
         // Generic Image Processing
         Globals->abbreviations.insert("SIFT", "Open+KeyPointDetector(SIFT)+KeyPointDescriptor(SIFT):KeyPointMatcher(BruteForce)");
diff --git a/sdk/plugins/normalize.cpp b/sdk/plugins/normalize.cpp
index 208ae11..a924e07 100644
--- a/sdk/plugins/normalize.cpp
+++ b/sdk/plugins/normalize.cpp
@@ -224,6 +224,30 @@ class RowWiseMeanCenterTransform : public Transform
 
 BR_REGISTER(Transform, RowWiseMeanCenterTransform)
 
+/*!
+ * \ingroup transforms
+ * \brief dst=sqrt(norm_L1(src)) proposed as RootSIFT in \cite Arandjelovic12
+ * \author Josh Klontz \cite jklontz
+ */
+class RootNormTransform : public UntrainableTransform
+{
+    Q_OBJECT
+
+    void project(const Template &src, Template &dst) const
+    {
+        const Mat &m = src;
+        dst.m() = Mat(m.rows, m.cols, m.type());
+        for (int i=0; i<m.rows; i++) {
+            Mat temp;
+            cv::normalize(m.row(i), temp, 1, 0, NORM_L1);
+            cv::sqrt(temp, temp);
+            temp.copyTo(dst.m().row(i));
+        }
+    }
+};
+
+BR_REGISTER(Transform, RootNormTransform)
+
 } // namespace br
 
 #include "normalize.moc"
diff --git a/share/openbr/openbr.bib b/share/openbr/openbr.bib
index 4e793f4..68e6daf 100644
--- a/share/openbr/openbr.bib
+++ b/share/openbr/openbr.bib
@@ -86,6 +86,14 @@
 
 
 % Papers
+@ inproceedings{Arandjelovic12, 
+	Author={Arandjelovic, R. and Zisserman, A.}, 
+	Booktitle={Computer Vision and Pattern Recognition (CVPR), 2012 IEEE Conference on},
+	Title={Three things everyone should know to improve object retrieval}, 
+	Month={June}, 
+	Year={2012}
+	Pages={2911-2918}}
+
 @inproceedings{belhumeur11,
 	Author = {Belhumeur, P.N. and Jacobs, D.W. and Kriegman, D.J. and Kumar, N.},
 	Booktitle = {Computer Vision and Pattern Recognition (CVPR), 2011 IEEE Conference on},
--
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