Work on file types

example.cpp

@@ -1,14 +1,30 @@
 #include <iostream>
 #include <opencv2/core.hpp>
 #include <sys/stat.h>
+#include <filesystem> // C++17
+
+namespace fs = std::filesystem;
 
 using namespace std;
 using namespace cv;
 
+string supportedExt[10] = {
+    ".jpg", ".JPG",
+    ".jpeg", ".JPEG",
+    ".png", ".PNG",
+    ".tif", ".TIF",
+    ".tiff", ".tiff"
+};
+
 inline bool file_exists (const std::string& name) {
   struct stat buffer;   
   return (stat (name.c_str(), &buffer) == 0); 
 }
+
+inline bool is_image (const std::string& name) {
+    fs::path filePath = name;
+    if (filePath.extension() == ".jpg")
+}
   
 int main(int argc, char** argv)
 {