OpenCVDemo/OpenCVTest/Program.cs

using OpenCvSharp;
using System;

namespace OpenCVTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Mat base_img = Cv2.ImRead(@"F:/20191204104138.jpg");
            get_answer_from_sheet(base_img);
        }
        public static void get_answer_from_sheet(Mat base_img)
        {
            Cv2.ImShow("src", base_img);
            Mat gray = new Mat();
            Cv2.CvtColor(base_img, gray, ColorConversionCodes.BGR2GRAY);
        }
        public static void get_init_process_img(Mat roi_img) {
            Mat h = new Mat();
            Cv2.Sobel(roi_img, h, MatType.CV_32F, 0, 1, -1);
            Mat v = new Mat();
            Cv2.Sobel(roi_img, v, MatType.CV_32F, 1, 0, -1);
            Mat img = new Mat();
            Cv2.Add(h, v,img);
            Cv2.ConvertScaleAbs(img,img);
            Cv2.GaussianBlur(img, img, new Size { Width = 3, Height = 3 }, 0); 
        }
    }
}