From b4e892ca2cde02695d2de7501bf4bf7f1f1aac38 Mon Sep 17 00:00:00 2001
From: Jim Martens <github@2martens.de>
Date: Tue, 9 May 2017 15:33:14 +0200
Subject: [PATCH] [CVV] Finished part one of CCV sheet 5

Signed-off-by: Jim Martens <github@2martens.de>
---
 ccv/sheet5/CMakeLists.txt |  9 +++++++
 ccv/sheet5/main.cpp       | 50 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 ccv/sheet5/CMakeLists.txt
 create mode 100644 ccv/sheet5/main.cpp

diff --git a/ccv/sheet5/CMakeLists.txt b/ccv/sheet5/CMakeLists.txt
new file mode 100644
index 0000000..a9a45e6
--- /dev/null
+++ b/ccv/sheet5/CMakeLists.txt
@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.5)
+project(sheet5)
+
+set(CMAKE_CXX_STANDARD 11)
+
+find_package( OpenCV REQUIRED )
+
+add_executable(sheet5 main.cpp)
+target_link_libraries(sheet5 ${OpenCV_LIBS})
diff --git a/ccv/sheet5/main.cpp b/ccv/sheet5/main.cpp
new file mode 100644
index 0000000..0ba5489
--- /dev/null
+++ b/ccv/sheet5/main.cpp
@@ -0,0 +1,50 @@
+#include <opencv2/opencv.hpp>
+
+int main(int argc, char** argv) {
+  if ( argc != 2 )
+  {
+    printf("usage: <Image_Path>\n");
+    return -1;
+  }
+
+  std::vector<cv::Mat> gabor_filters = std::vector<cv::Mat>();
+  cv::Size size = cv::Size(20, 20);
+  double wavelength = 3;
+  double standard_deviation = 18;
+  // g_1
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (4.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+  // g_2
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (3.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+  // g_3
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (2.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+  // g_4
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (1.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+  // g_5
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, 0, wavelength, 1, 0, CV_32F));
+  // g_6
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (7.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+  // g_7
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (6.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+  // g_8
+  gabor_filters.push_back(cv::getGaborKernel(size, standard_deviation, (5.0/8.0) * CV_PI, wavelength, 1, 0, CV_32F));
+
+  for (unsigned long i = 0; i < 8; i++) {
+    cv::namedWindow("g_" + std::to_string(i + 1), CV_WINDOW_NORMAL);
+    cv::imshow("g_" + std::to_string(i + 1), gabor_filters.at(i));
+    cv::waitKey(0);
+  }
+
+  // read input image
+  cv::Mat image = cv::imread(argv[1]);
+  image.convertTo(image, CV_32F);
+
+  for (unsigned long i = 0; i < 8; i++) {
+    cv::Mat filtered_image;
+    cv::filter2D(image, filtered_image, -1, gabor_filters.at(i), cv::Point(-1, -1), 0, cv::BORDER_CONSTANT);
+    cv::namedWindow("filtered_" + std::to_string(i + 1), CV_WINDOW_NORMAL);
+    cv::imshow("filtered_" + std::to_string(i + 1), filtered_image);
+    cv::waitKey(0);
+  }
+
+  return 0;
+}