[CCV] Created skeleton for exercise 4

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

ccv/sheet4/gauss_pyramid.cpp

@@ -0,0 +1,21 @@
+#include "gauss_pyramid.h"
+
+gauss_pyramid::gauss_pyramid() {}
+
+gauss_pyramid::gauss_pyramid(cv::Mat img, float sigma, int number_of_layers)
+{
+  _layers.push_back(img);
+  cv::Mat blurredImage;
+  cv::Mat resizedImage = img;
+  for (int i = 1; i < number_of_layers; i++)
+  {
+    cv::GaussianBlur(resizedImage, blurredImage, cv::Size(0, 0), sigma, sigma, cv::BORDER_REPLICATE);
+    cv::resize(blurredImage, resizedImage, cv::Size(), 0.5, 0.5, cv::INTER_NEAREST);
+    _layers.push_back(resizedImage);
+  }
+}
+
+cv::Mat gauss_pyramid::get(int layer)
+{
+  return _layers.at((unsigned long) layer);
+}