diff --git a/ccv/sheet6/CMakeLists.txt b/ccv/sheet6/CMakeLists.txt
new file mode 100644
index 0000000..a3d96d3
--- /dev/null
+++ b/ccv/sheet6/CMakeLists.txt
@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.5)
+project(sheet6)
+
+set(CMAKE_CXX_STANDARD 11)
+
+find_package( OpenCV REQUIRED )
+
+add_executable(sheet6 fusion.cpp main.cpp)
+target_link_libraries(sheet6 ${OpenCV_LIBS})
diff --git a/ccv/sheet6/fusion.cpp b/ccv/sheet6/fusion.cpp
new file mode 100644
index 0000000..36f8d61
--- /dev/null
+++ b/ccv/sheet6/fusion.cpp
@@ -0,0 +1,40 @@
+#include <opencv2/opencv.hpp>
+#include "fusion.h"
+
+/**
+ * Returns the mean fusion of two feature maps.
+ *
+ * @param f_on_off feature map on off
+ * @param f_off_on feature map off on
+ * @return conspicuity map
+ */
+cv::Mat mean_fusion(cv::Mat f_on_off, cv::Mat f_off_on) {
+  cv::Mat C_l = 0.5 * (f_on_off + f_off_on);
+  double max_on_off;
+  double max_off_on;
+  cv::minMaxLoc(f_on_off, nullptr, &max_on_off);
+  cv::minMaxLoc(f_off_on, nullptr, &max_off_on);
+  double max = max_on_off >= max_off_on ? max_on_off : max_off_on;
+  cv::normalize(C_l, C_l, 0, max, cv::NORM_MINMAX, -1);
+
+  return C_l.clone();
+}
+
+/**
+ * Returns the max fusion of two feature maps.
+ *
+ * @param f_on_off feature map on off
+ * @param f_off_on feature map off on
+ * @return constpicuity map
+ */
+cv::Mat max_fusion(cv::Mat f_on_off, cv::Mat f_off_on) {
+  cv::Mat C_l = cv::max(f_on_off, f_off_on);
+  double max_on_off;
+  double max_off_on;
+  cv::minMaxLoc(f_on_off, nullptr, &max_on_off);
+  cv::minMaxLoc(f_off_on, nullptr, &max_off_on);
+  double max = max_on_off >= max_off_on ? max_on_off : max_off_on;
+  cv::normalize(C_l, C_l, 0, max, cv::NORM_MINMAX, -1);
+
+  return C_l.clone();
+}
diff --git a/ccv/sheet6/fusion.h b/ccv/sheet6/fusion.h
new file mode 100644
index 0000000..57eac93
--- /dev/null
+++ b/ccv/sheet6/fusion.h
@@ -0,0 +1,7 @@
+#ifndef SHEET6_FUSION_H
+#define SHEET6_FUSION_H
+
+cv::Mat mean_fusion(cv::Mat f_on_off, cv::Mat f_off_on);
+cv::Mat max_fusion(cv::Mat f_on_off, cv::Mat f_off_on);
+
+#endif //SHEET6_FUSION_H
diff --git a/ccv/sheet6/main.cpp b/ccv/sheet6/main.cpp
new file mode 100644
index 0000000..7f38554
--- /dev/null
+++ b/ccv/sheet6/main.cpp
@@ -0,0 +1,67 @@
+#include <opencv2/opencv.hpp>
+#include "fusion.h"
+
+int main(int argc, char **argv) {
+  std::vector<cv::Mat> on_off(10);
+  std::vector<cv::Mat> off_on(10);
+  for (int i = 0; i < 10; ++i) {
+    std::stringstream ss;
+    ss << i;
+    std::string i_as_str = ss.str();
+
+    std::string off_on_filename = "../contrasts/off_on_L_" + i_as_str + ".png";
+    off_on[i] = cv::imread(off_on_filename.c_str(), CV_LOAD_IMAGE_GRAYSCALE);
+    off_on[i].convertTo(off_on[i], CV_32F);
+
+    std::string on_off_filename = "../contrasts/on_off_L_" + i_as_str + ".png";
+    on_off[i] = cv::imread(on_off_filename.c_str(), CV_LOAD_IMAGE_GRAYSCALE);
+    on_off[i].convertTo(on_off[i], CV_32F);
+
+    /*cv::namedWindow(off_on_filename.c_str(), CV_WINDOW_NORMAL);
+    cv::imshow(off_on_filename.c_str(), off_on[i]);
+    cv::namedWindow(on_off_filename.c_str(), CV_WINDOW_NORMAL);
+    cv::imshow(on_off_filename.c_str(), on_off[i]);
+
+    cv::waitKey(0);
+    cv::destroyWindow(off_on_filename.c_str());
+    cv::destroyWindow(on_off_filename.c_str());*/
+  }
+  cv::Mat feature_map_on_off = (cv::Mat &&) on_off.at(0);
+  cv::Mat feature_map_off_on = (cv::Mat &&) off_on.at(0);
+  cv::Size original_size_on_off = feature_map_on_off.size();
+  cv::Size original_size_off_on = feature_map_off_on.size();
+  for (unsigned long i = 1; i < 10; i++) {
+    cv::Mat resized_image;
+    cv::resize(on_off.at(i), resized_image, original_size_on_off, 0, 0, cv::INTER_CUBIC);
+    feature_map_on_off += resized_image;
+    cv::resize(off_on.at(i), resized_image, original_size_off_on, 0, 0, cv::INTER_CUBIC);
+    feature_map_off_on += resized_image;
+  }
+
+  cv::Mat f_on_off_norm;
+  cv::normalize(feature_map_on_off, f_on_off_norm, 0, 1, cv::NORM_MINMAX, -1);
+  cv::namedWindow("F on off", CV_WINDOW_NORMAL);
+  cv::imshow("F on off", f_on_off_norm);
+  cv::Mat f_off_on_norm;
+  cv::normalize(feature_map_off_on, f_off_on_norm, 0, 1, cv::NORM_MINMAX, -1);
+  cv::namedWindow("F off on", CV_WINDOW_NORMAL);
+  cv::imshow("F off on", f_off_on_norm);
+
+  cv::waitKey(0);
+  cv::destroyAllWindows();
+
+  cv::Mat C_l_mean = mean_fusion(feature_map_on_off, feature_map_off_on);
+  cv::Mat C_l_mean_norm;
+  cv::normalize(C_l_mean, C_l_mean_norm, 0, 1, cv::NORM_MINMAX, -1);
+  cv::namedWindow("C_l_mean", CV_WINDOW_NORMAL);
+  cv::imshow("C_l_mean", C_l_mean_norm);
+  cv::Mat C_l_max = max_fusion(feature_map_on_off, feature_map_off_on);
+  cv::Mat C_l_max_norm;
+  cv::normalize(C_l_max, C_l_max_norm, 0, 1, cv::NORM_MINMAX, -1);
+  cv::namedWindow("C_l_max", CV_WINDOW_NORMAL);
+  cv::imshow("C_l_max", C_l_max_norm);
+  cv::waitKey(0);
+
+
+  return 0;
+}