Adds DCTMedian

Probably DCT Average would work better..

Descriptor.h

@@ -360,4 +360,35 @@ public:
 	string ToString() {
 		return "Discrete Cosine Transform - Pearson Code";
 	}
+};
+
+class DCTMedian : public Descriptor {
+public:
+	bitset<64> feature(Image* img) {
+		double* converted = CalculateDCT(img);
+		double bullshit[64];
+		for (ssize_t i = 0; i < 64; i++) {
+			bullshit[i] = converted[i];
+		}
+		sort(bullshit, bullshit + 64);
+		float median = (float)(bullshit[31] + bullshit[32]) / 2;
+
+		bitset<64> retval(0);
+		for (ssize_t i = 0; i < 64; i++) {
+			retval <<= 1;
+			if (converted[i] > median)
+				retval |= bitset<64>(1);
+		}
+		return retval;
+	}
+	unsigned long long distance(bitset<64> a, bitset<64> b) {
+		int biterror = 0;
+		for (int i = 0; i < 64; i++) {
+			if (a[i] != b[i]) biterror++;
+		}
+		return biterror;
+	};
+	string ToString() {
+		return "Discrete Cosine Transform - Median Code";
+	}
 };