C# OpenCvSharp 模拟生成车辆运行视频

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效果

项目

代码

using OpenCvSharp;

using OpenCvSharp.Extensions;

using System;

using System.Diagnostics;

using System.Drawing;

using System.Windows.Forms;

namespace OpenCvSharp_Demo

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        string image_path;

        Stopwatch stopwatch = new Stopwatch();

        private void Form1_Load(object sender, EventArgs e)

        {

            image_path = "bg_img.jpg";

            pictureBox1.Image = new Bitmap(image_path);

        }

        Mat bgImg;

        Mat car_bgra;

        Mat car;

        Mat mask;

        Rect roi;

        Mat pos;

        int x, y, width, height, step;

        private void button6_Click(object sender, EventArgs e)

        {

            x = Convert.ToInt32(txtX.Text);

            y = Convert.ToInt32(txtY.Text);

            width = Convert.ToInt32(txtW.Text);

            height = Convert.ToInt32(txtH.Text);

            Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));

            Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));

            textBox1.Text = string.Format("x={0};y={1}", x, y);

            ShowCar();

        }

        private void button5_Click(object sender, EventArgs e)

        {

            step = Convert.ToInt32(txtStep.Text);

            y = y + step;

            ShowCar();

        }

        private void button7_Click(object sender, EventArgs e)

        {

            step = Convert.ToInt32(txtStep.Text);

            x = x - step;

            ShowCar();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            step = Convert.ToInt32(txtStep.Text);

            y = y - step;

            ShowCar();

        }

        VideoCapture capture;

        Mat currentFrame = new Mat();

        private void button8_Click(object sender, EventArgs e)

        {

            capture = new VideoCapture("out.mp4");

            if (!capture.IsOpened())

            {

                MessageBox.Show("打开视频文件失败");

                return;

            }

            capture.Read(currentFrame);

            if (!currentFrame.Empty())

            {

                pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);

                timer1.Interval = (int)(1000.0 / capture.Fps);

                timer1.Enabled = true;

            }

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            capture.Read(currentFrame);

            if (currentFrame.Empty())

            {

                //pictureBox1.Image = null;

                timer1.Enabled = false;

                capture.Release();

                textBox1.Text = "播放完毕。";

                return;

            }

            pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);

        }

        bool ShowCar()

        {

            textBox1.Text = string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);

            txtX.Text = x.ToString();

            txtY.Text = y.ToString();

            txtW.Text = width.ToString();

            txtH.Text = height.ToString();

            roi = new Rect(x, y, width, height);

            if (x < 0)

            {

                x = 0;

                textBox1.Text = "位置越界";

                return false;

            }

            if (y < 0)

            {

                y = 0;

                textBox1.Text = "位置越界";

                return false;

            }

            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);

            if (roi.Bottom > bgImg.Height)

            {

                textBox1.Text = "位置越界";

                bgImg.Dispose();

                return false;

            }

            if (roi.Right > bgImg.Width)

            {

                textBox1.Text = "位置越界";

                bgImg.Dispose();

                return false;

            }

            pos = new Mat(bgImg, roi);

            car.CopyTo(pos, mask);

            pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());

            pos.Dispose();

            bgImg.Dispose();

            return true;

        }

        private void button3_Click(object sender, EventArgs e)

        {

            step = Convert.ToInt32(txtStep.Text);

            x = x + step;

            ShowCar();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);

            car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);

            car = Cv2.ImRead("car1.png", ImreadModes.Color);

            //透明图

            //B,G,R,A   B,G,R -> 0 黑色 255 白色

            //A为透明度 -> 255为不透明，0为全透。

            var alphaBgr = Cv2.Split(car_bgra);

            mask = alphaBgr[3];

            x = 0;

            y = 0;

            width = car.Cols;

            height = car.Rows;

            ShowCar();

        }

        private void button4_Click(object sender, EventArgs e)

        {

            x = 1120;

            y = 0;

            width = 400;

            height = 400;

            Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));

            Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));

            Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));

            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);

            VideoWriter vwriter = new VideoWriter("out.mp4", FourCC.X264, 30, new OpenCvSharp.Size(bgImg.Width, bgImg.Height));

            int count = 0;

            for (int i = 0; i < 200; i++)

            {

                y = y + 10;

                width = width + 2;

                height = height + 2;

                car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);

                car = Cv2.ImRead("car1.png", ImreadModes.Color);

                Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));

                Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));

                var alphaBgr = Cv2.Split(car_bgra);

                mask = alphaBgr[3];

                roi = new Rect(x, y, width, height);

                if (roi.Bottom > bgImg.Height)

                {

                    textBox1.Text = "位置越界";

                    break;

                }

                if (roi.Right > bgImg.Width)

                {

                    textBox1.Text = "位置越界";

                    break;

                }

                bgImg = Cv2.ImRead(image_path, ImreadModes.Color);

                pos = new Mat(bgImg, roi);

                car.CopyTo(pos, mask);

                Cv2.ImWrite("out/" + i + ".jpg", bgImg);

                vwriter.Write(bgImg);

                count++;

                //pos.Dispose();

                //bgImg.Dispose();

            }

            pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());

            //Cv2.ImWrite("result.jpg", bgImg);

            //double costTime = stopwatch.Elapsed.TotalMilliseconds;

            //textBox1.Text = $"耗时:{costTime:F2}ms";

            textBox1.Text = "生成完毕！count=" + count.ToString();

            textBox1.Text += string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);

            vwriter.Release();

        }

    }

}

using OpenCvSharp;
using OpenCvSharp.Extensions;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
namespace OpenCvSharp_Demo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string image_path;
        Stopwatch stopwatch = new Stopwatch();
        private void Form1_Load(object sender, EventArgs e)
        {
            image_path = "bg_img.jpg";
            pictureBox1.Image = new Bitmap(image_path);
        }
        Mat bgImg;
        Mat car_bgra;
        Mat car;
        Mat mask;
        Rect roi;
        Mat pos;
        int x, y, width, height, step;
        private void button6_Click(object sender, EventArgs e)
        {
            x = Convert.ToInt32(txtX.Text);
            y = Convert.ToInt32(txtY.Text);
            width = Convert.ToInt32(txtW.Text);
            height = Convert.ToInt32(txtH.Text);
            Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));
            Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
            textBox1.Text = string.Format("x={0};y={1}", x, y);
            ShowCar();
        }
        private void button5_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            y = y + step;
            ShowCar();
        }
        private void button7_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            x = x - step;
            ShowCar();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            y = y - step;
            ShowCar();
        }
        VideoCapture capture;
        Mat currentFrame = new Mat();
        private void button8_Click(object sender, EventArgs e)
        {
            capture = new VideoCapture("out.mp4");
            if (!capture.IsOpened())
            {
                MessageBox.Show("打开视频文件失败");
                return;
            }
            capture.Read(currentFrame);
            if (!currentFrame.Empty())
            {
                pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
                timer1.Interval = (int)(1000.0 / capture.Fps);
                timer1.Enabled = true;
            }
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            capture.Read(currentFrame);
            if (currentFrame.Empty())
            {
                //pictureBox1.Image = null;
                timer1.Enabled = false;
                capture.Release();
                textBox1.Text = "播放完毕。";
                return;
            }
            pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
        }
        bool ShowCar()
        {
            textBox1.Text = string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);
            txtX.Text = x.ToString();
            txtY.Text = y.ToString();
            txtW.Text = width.ToString();
            txtH.Text = height.ToString();
            roi = new Rect(x, y, width, height);
            if (x < 0)
            {
                x = 0;
                textBox1.Text = "位置越界";
                return false;
            }
            if (y < 0)
            {
                y = 0;
                textBox1.Text = "位置越界";
                return false;
            }
            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
            if (roi.Bottom > bgImg.Height)
            {
                textBox1.Text = "位置越界";
                bgImg.Dispose();
                return false;
            }
            if (roi.Right > bgImg.Width)
            {
                textBox1.Text = "位置越界";
                bgImg.Dispose();
                return false;
            }
            pos = new Mat(bgImg, roi);
            car.CopyTo(pos, mask);
            pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());
            pos.Dispose();
            bgImg.Dispose();
            return true;
        }
        private void button3_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            x = x + step;
            ShowCar();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
            car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);
            car = Cv2.ImRead("car1.png", ImreadModes.Color);
            //透明图
            //B,G,R,A   B,G,R -> 0 黑色 255 白色
            //A为透明度 -> 255为不透明，0为全透。
            var alphaBgr = Cv2.Split(car_bgra);
            mask = alphaBgr[3];
            x = 0;
            y = 0;
            width = car.Cols;
            height = car.Rows;
            ShowCar();
        }
        private void button4_Click(object sender, EventArgs e)
        {
            x = 1120;
            y = 0;
            width = 400;
            height = 400;
            Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));
            Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
            Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));
            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
            VideoWriter vwriter = new VideoWriter("out.mp4", FourCC.X264, 30, new OpenCvSharp.Size(bgImg.Width, bgImg.Height));
            int count = 0;
            for (int i = 0; i < 200; i++)
            {
                y = y + 10;
                width = width + 2;
                height = height + 2;
                car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);
                car = Cv2.ImRead("car1.png", ImreadModes.Color);
                Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));
                Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
                var alphaBgr = Cv2.Split(car_bgra);
                mask = alphaBgr[3];
                roi = new Rect(x, y, width, height);
                if (roi.Bottom > bgImg.Height)
                {
                    textBox1.Text = "位置越界";
                    break;
                }
                if (roi.Right > bgImg.Width)
                {
                    textBox1.Text = "位置越界";
                    break;
                }
                bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
                pos = new Mat(bgImg, roi);
                car.CopyTo(pos, mask);
                Cv2.ImWrite("out/" + i + ".jpg", bgImg);
                vwriter.Write(bgImg);
                count++;
                //pos.Dispose();
                //bgImg.Dispose();
            }
            pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());
            //Cv2.ImWrite("result.jpg", bgImg);
            //double costTime = stopwatch.Elapsed.TotalMilliseconds;
            //textBox1.Text = $"耗时:{costTime:F2}ms";
            textBox1.Text = "生成完毕！count=" + count.ToString();
            textBox1.Text += string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);
            vwriter.Release();
        }
    }
}

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