C#中使用opencv

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已于 2023-12-22 14:07:11 修改

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文章标签： opencv 计算机视觉人工智能

于 2023-03-15 15:44:01 首次发布

本文链接：https://blog.youkuaiyun.com/qq_41375318/article/details/129557293

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C#中使用opencv

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安装下述三个包

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安装：OpenCvSharp4.Extensions

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// 读取图像
Mat img1 = new Mat(imgPath, ImreadModes.Color);
OpenCvSharp.Size imgSize = img1.Size();

int img1Width =  imgSize.Width;
int img1Height = imgSize.Height;
// 读取标签
string name = Path.GetFileName(imgPath).Split('.')[0];

string dirName = Path.GetDirectoryName(imgPath);
DirectoryInfo path001 = new DirectoryInfo(dirName); // 用于识别train还是val
DirectoryInfo path111 = Directory.GetParent(textBox1.Text.Trim());
DirectoryInfo path112 = Directory.GetParent(path111.FullName);

string labelPath = Path.Combine(Path.Combine(path112.FullName,"labels", path001.Name), name + ".txt");

// 重要赋值(***)
Current_LabelPath = labelPath;

// 显示label路径
label2.Text = labelPath;
/*
 *
 * 核心：将标签框显示到图像进行显示
 *
 */
try
{

    // 创建一个 StreamReader 的实例来读取文件 
    // using 语句也能关闭 StreamReader
    using (StreamReader sr = new StreamReader(labelPath))
    {
        string line;

        // 从文件读取并显示行，直到文件的末尾 
        while ((line = sr.ReadLine()) != null)
        {
            Console.WriteLine(line);
            string[] res1 = line.Split(' ');

            double center_x = img1Width * Convert.ToDouble(res1[1]);
            int centerX = Convert.ToInt32(center_x);

            //int leftUp1 = Convert.ToInt32(); 
            double center_y = img1Height * Convert.ToDouble(res1[2]);
            int centerY = Convert.ToInt32(center_y);

            double wd = img1Height * Convert.ToDouble(res1[3]);
            int Width = Convert.ToInt32(wd);

            double hg = img1Height * Convert.ToDouble(res1[4]);
            int Height = Convert.ToInt32(hg);


            OpenCvSharp.Point truck_a = new OpenCvSharp.Point(centerX - Width/2, centerY-Height/2);
            OpenCvSharp.Point truck_b = new OpenCvSharp.Point(centerX + Width/2, centerY + Height/2);
            Cv2.Rectangle(img1, truck_a, truck_b, Scalar.Red, 15);
        }

        //Cv2.ImWrite(@"show.jpg", img1);
        //把Mat格式的图片转换成Bitmap
        Bitmap bitmap = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(img1);
        //运行上面的代码需要安装新的库OpenCvSharp4.Extensions

        //显示图片
        pictureBox1.Image = bitmap;