C# OpenCvSharp 模拟生成车辆运行视频

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效果

项目

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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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