diff --git a/OpenCV_test/test9_imagecapture/main.cpp b/OpenCV_test/test9_imagecapture/main.cpp
deleted file mode 100644
index 5f6bfe9..0000000
--- a/OpenCV_test/test9_imagecapture/main.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-#include <opencv2/opencv.hpp>
-#include "../../json_nlohmann/json.hpp"
-#include <fstream>
-#include <string>
-#include <iostream>
-
-using namespace cv;
-using json = nlohmann::json;
-
-int main(int argc, char **argv)
-{
-    // Read Config from json file
-    std::string path, video_path;
-    bool save_video;
-    std::ifstream config_file("config_collect.json");
-    if (config_file.is_open())
-    {
-        json data = json::parse(config_file);
-        path = data["path"];
-        if (path[path.length() - 1] != '/')
-        {
-            path = path + "/";
-        }
-        video_path = data["video_path"];
-        save_video = data["save_video"];
-    }
-    else
-    {
-        path = "./";
-        save_video = false;
-    }
-
-    // Start Video Capture
-    bool CollectEnabled = false;
-    VideoCapture capture(0);
-    if (!capture.isOpened())
-    {
-        std::cout << "Can't open video device!" << std::endl;
-        return -1;
-    }
-
-    // properties
-    double rate = capture.get(CAP_PROP_FPS);
-    double width = capture.get(CAP_PROP_FRAME_WIDTH);
-    double height = capture.get(CAP_PROP_FRAME_HEIGHT);
-
-    // Save video
-    VideoWriter writer;
-    if (save_video)
-    {
-        writer = VideoWriter(video_path, VideoWriter::fourcc('m', 'p', '4', 'v'), rate, Size(width, height), true);
-    }
-
-    // Information about the camera
-    std::cout << "Frame Rate = " << rate << "width = " << width << "height = " << height << std::endl;
-
-    namedWindow("Video Capture", WINDOW_NORMAL);
-
-    Mat frame;
-    while (1)
-    {
-        // read frame from video capture
-        if (!capture.read(frame))
-        {
-            std::cout << "no video frame" << std::endl;
-            continue;
-        }
-
-        // Show the image of frame
-        imshow("Video Capture", frame);
-
-        // Write frame to file
-        static int count = 0;
-        if (CollectEnabled)
-        {
-            count++;
-            std::string filename = path + std::to_string(count) + ".jpg";
-            imwrite(filename, frame);
-            // write to video when it enabled
-            if (save_video)
-            {
-                writer.write(frame);
-            }
-        }
-
-        int c = waitKey(1000 / rate);
-
-        if (c == 27)
-        {
-            break;
-        }
-        if (c == 99)
-        {
-            CollectEnabled = !CollectEnabled;
-        }
-    }
-
-    capture.release();
-    writer.release();
-    destroyAllWindows();
-    return 0;
-}
diff --git a/README.md b/README.md
index 0ca84d3..773126a 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,8 @@
 
 Thanks for the project author https://github.com/Makman2/GCR_CMake
 
+and the author of json: https://github.com/nlohmann/json[GitHub - nlohmann/json: JSON for Modern C++](https://github.com/nlohmann/json)
+
 The test for Qt5 is starting, and some example from the Qt opensource example.
 
 (Actually, I forked the project for convenience)