From 13fd4101f993e22bc0b51ae9237ee782173f9415 Mon Sep 17 00:00:00 2001
From: Patrick Simianer <p@simianer.de>
Date: Sat, 1 Apr 2017 21:44:04 +0200
Subject: unsharp-mask

---
 unsharp-mask.cc | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 unsharp-mask.cc

diff --git a/unsharp-mask.cc b/unsharp-mask.cc
new file mode 100644
index 0000000..f5cbeb1
--- /dev/null
+++ b/unsharp-mask.cc
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <vector>
+#include "opencv2/opencv.hpp"
+#include "opencv2/photo/photo.hpp"
+#include "cxxopts/src/cxxopts.hpp"
+
+using namespace std;
+using namespace cv;
+
+int
+main (int argc, char** argv)
+{
+  cxxopts::Options opt(argv[0], " - Options");
+  opt.add_options()
+    ("f,file",   "file",                                cxxopts::value<string>())
+    ("s,sigma",  "sigma for Gaussian Blur",             cxxopts::value<float>()->default_value("3.0"))
+    ("a,alpha",  "weight of the first array elements",  cxxopts::value<float>()->default_value("1.5"))
+    ("b,beta",   "weight of the second array elements", cxxopts::value<float>()->default_value("-0.5"))
+    ("g,gamma",  "scalar added to each sum",            cxxopts::value<float>()->default_value("0"))
+    ("o,output", "output file",                         cxxopts::value<string>());
+
+  opt.parse(argc, argv);
+
+  auto& file = opt["f"].as<string>();
+  auto& output = opt["o"].as<string>();
+  float sigma = opt["s"].as<float>();
+  float alpha = opt["a"].as<float>();
+  float beta  = opt["b"].as<float>();
+
+  Mat src = imread(file, 1), dst;
+  cv::GaussianBlur(src, dst, cv::Size(0, 0), sigma);
+  cv::addWeighted(src, alpha, dst, beta, 0, dst);
+  imwrite(output, dst);
+
+  return 0;
+}
+
-- 
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