[CVV] Added orientation pyramid

Signed-off-by: Jim Martens <github@2martens.de>

ccv/sheet5/oriented_pyramid.h

@@ -0,0 +1,43 @@
+#ifndef SHEET5_ORIENTED_PYRAMID_H
+#define SHEET5_ORIENTED_PYRAMID_H
+
+#include <opencv2/opencv.hpp>
+#include "laplacian_pyramid.h"
+
+class oriented_pyramid {
+private:
+    std::vector<std::vector<cv::Mat>> _orientation_maps;
+    std::vector<cv::Mat> _gabor_filters;
+    std::vector<cv::Mat> _feature_maps;
+
+    /**
+     * Initializes the Gabor filters.
+     * @param num_orientations the number of orientations to use
+     */
+    void initialize_gabor_filters(float num_orientations);
+public:
+    /**
+     * Initializes the oriented pyramid.
+     * @param pyramid the laplacian pyramid
+     * @param num_orientations the number of Gabor filters to apply
+     */
+    oriented_pyramid(const laplacian_pyramid& pyramid, int num_orientations);
+
+    /**
+     * Computes the feature maps.
+     */
+    void compute_feature_maps();
+
+    /**
+     * Returns the feature map for the nth orientation.
+     *
+     * compute_feature_maps must be called first.
+     *
+     * @param orientation the nth orientation
+     * @return the feature map
+     */
+    cv::Mat get_feature_map(int orientation);
+};
+
+
+#endif //SHEET5_ORIENTED_PYRAMID_H