From b249c3fb4794c6e82584059a7e8094c2b07ffc35 Mon Sep 17 00:00:00 2001
From: Josh Klontz <josh.klontz@gmail.com>
Date: Thu, 4 Apr 2013 18:28:55 -0400
Subject: [PATCH] trying kernel hash algorithm

---
 openbr/plugins/algorithms.cpp |  2 +-
 openbr/plugins/hash.cpp       | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/openbr/plugins/algorithms.cpp b/openbr/plugins/algorithms.cpp
index 766963e..9fdf0b6 100644
--- a/openbr/plugins/algorithms.cpp
+++ b/openbr/plugins/algorithms.cpp
@@ -43,7 +43,7 @@ class AlgorithmsInitializer : public Initializer
         Globals->abbreviations.insert("GenderEstimation", "GenderClassification");
         Globals->abbreviations.insert("AgeEstimation", "AgeRegression");
         Globals->abbreviations.insert("FaceRecognition2", "{PP5Register+Affine(128,128,0.25,0.35)+Cvt(Gray)}+(Gradient+Bin(0,360,9,true))/(Blur(1)+Gamma(0.2)+DoG(1,2)+ContrastEq(0.1,10)+LBP(1,2,true)+Bin(0,10,10,true))+Merge+Integral+RecursiveIntegralSampler(4,2,8,Center(Hellinger)+LDA(.95)+Normalize(L1)+Div(3)+ProductQuantization(3,L1,true)[fraction=0.2]):RecursiveProductQuantization");
-        Globals->abbreviations.insert("FaceRecognitionHoG", "{PP5Register+Affine(128,128,0.25,0.35)+Cvt(Gray)}+Blur(1)+Gamma(0.2)+DoG(1,2)+ContrastEq(0.1,10)+LBP(1,2,true)+Bin(0,10,10,true)+Merge+Integral+RecursiveIntegralSampler(4,2,8,LDA(.95)+Normalize(L1)+Div(3)+ProductQuantization(3,L1,true)[fraction=0.2]):RecursiveProductQuantization");
+        Globals->abbreviations.insert("FaceRecognitionHoG", "{PP5Register+Affine(128,128,0.25,0.35)+Cvt(Gray)}+Gradient+Bin(0,360,9)+KernelHash(9,81)+Bin(0,81,81,true)+Merge+Integral+RecursiveIntegralSampler(4,2,8,LDA(.95)+Normalize(L1)+Div(3)+ProductQuantization(3,L1,true)[fraction=0.2]):RecursiveProductQuantization");
 
         // Generic Image Processing
         Globals->abbreviations.insert("SIFT", "Open+KeyPointDetector(SIFT)+KeyPointDescriptor(SIFT):KeyPointMatcher(BruteForce)");
diff --git a/openbr/plugins/hash.cpp b/openbr/plugins/hash.cpp
index e3f1a79..179b547 100644
--- a/openbr/plugins/hash.cpp
+++ b/openbr/plugins/hash.cpp
@@ -18,6 +18,8 @@
 #include "openbr_internal.h"
 #include "openbr/core/qtutils.h"
 
+using namespace cv;
+
 namespace br
 {
 
@@ -54,6 +56,40 @@ private:
 
 BR_REGISTER(Transform, CryptographicHashTransform)
 
+/*!
+ * \ingroup transforms
+ * \brief Kernel hash
+ * \author Josh Klontz \cite jklontz
+ */
+class KernelHashTransform : public UntrainableTransform
+{
+    Q_OBJECT
+    Q_PROPERTY(uchar dimsIn READ get_dimsIn WRITE set_dimsIn RESET reset_dimsIn STORED false)
+    Q_PROPERTY(uchar dimsOut READ get_dimsOut WRITE set_dimsOut RESET reset_dimsOut STORED false)
+    BR_PROPERTY(uchar, dimsIn, 8)
+    BR_PROPERTY(uchar, dimsOut, 7)
+
+    void project(const Template &src, Template &dst) const
+    {
+        if (src.m().type() != CV_8UC1)
+            qFatal("Expected 8UC1 input.");
+
+        dst = Mat::zeros(src.m().rows, src.m().cols, CV_8UC1);
+        const uchar *srcData = src.m().data;
+        uchar *dstData = dst.m().data;
+        const int step = src.m().cols;
+        for (int i=0; i<src.m().rows; i++)
+            for (int j=0; j<src.m().cols-1; j++) {
+                dstData[i*step+j] = (uint(pow(float(dimsIn),1.f))*srcData[i    *step+j]
+                                   /*+ uint(pow(float(dimsIn),2.f))*srcData[(i+1)*step+j]*/
+                                   + uint(pow(float(dimsIn),0.f))*srcData[i    *step+(j+1)]
+                                   /*+ uint(pow(float(dimsIn),0.f))*srcData[(i+1)*step+(j+1)]*/) % dimsOut;
+            }
+    }
+};
+
+BR_REGISTER(Transform, KernelHashTransform)
+
 } // namespace br
 
 #include "hash.moc"
--
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