设置背景图像 [英] Set background image

问题描述

你好，



我是C＃的新手。我知道编程，但我是C＃的新手。我正在尝试AFORGE.net框架，我想制作一个动作探测器。探测器不会发出警报声，但会显示红色轮廓的运动区域。



这是我的FinalVideo_NewFrame方法代码。

Hello,

I am a newbie to C#. I know programming but I am new in C#. I was trying out the AFORGE.net framework and I wanna make a Motion Detector. The detector won't sound an alarm or so but would display the motion areas with red outline.

Here is my code for FinalVideo_NewFrame method.

using AForge.Imaging;
using AForge.Imaging.Filters;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Vision;
using AForge.Vision.Motion;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;



namespace mtrack
{
    public partial class Form1 : Form
    {
        private FilterInfoCollection VideoCaptureDevices;
        private VideoCaptureDevice FinalVideo;
        int height = 0, width = 0;
        public Form1()
        {

            InitializeComponent();
            {
                VideoCaptureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
                foreach (FilterInfo VideoCaptureDevice in VideoCaptureDevices)
                {
                    comboBox1.Items.Add(VideoCaptureDevice.Name);
                }
                comboBox1.SelectedIndex = 0;

            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            FinalVideo = new VideoCaptureDevice(VideoCaptureDevices[comboBox1.SelectedIndex].MonikerString);
            FinalVideo.NewFrame += new NewFrameEventHandler(FinalVideo_NewFrame);
            FinalVideo.Start();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            FinalVideo.Stop();
        }
        void FinalVideo_NewFrame(object sender, NewFrameEventArgs e)
        {
            Grayscale filter = new Grayscale(0.2125, 0.7154, 0.0721);
            Difference differenceFilter = new Difference();
            IFilter thresholdFilter = new Threshold(15);
            CustomFrameDifferenceDetector p = new CustomFrameDifferenceDetector();
            MotionDetector detector = new MotionDetector(new CustomFrameDifferenceDetector(), new MotionBorderHighlighting());
            try
            {

                Bitmap video = (Bitmap)e.Frame.Clone();
                Bitmap currentFrame1 = video;
                Bitmap backgroundframe=video;

                backgroundframe=
                backgroundframe = filter.Apply(backgroundframe);
                differenceFilter.OverlayImage = backgroundframe;
                Bitmap currentFrame;
                if (currentFrame1!= null)
                {
                    
                    currentFrame = filter.Apply(currentFrame1);
                    // apply the filters
                    Bitmap tmp1 = differenceFilter.Apply(currentFrame);
                    Bitmap tmp2 = thresholdFilter.Apply(tmp1);
                    // create filter
                    IFilter erosionFilter = new Erosion();
                    // apply the filter 
                    Bitmap tmp3 = erosionFilter.Apply(tmp2);
                    // extract red channel from the original image
                    IFilter extrachChannel = new ExtractChannel(RGB.R);
                    Bitmap redChannel = extrachChannel.Apply(video);
                    //  merge red channel with motion regions
                    Merge mergeFilter = new Merge();
                    mergeFilter.OverlayImage = tmp3;
                    Bitmap tmp4 = mergeFilter.Apply(redChannel);
                    // replace red channel in the original image
                    ReplaceChannel replaceChannel = new ReplaceChannel(RGB.R, tmp4);
                    replaceChannel.ChannelImage = tmp4;
                    Bitmap tmp5 = replaceChannel.Apply(video);
                    pictureBox1.Image = backgroundframe;
                    pictureBox2.Image = currentFrame;
                    pictureBox3.Image = tmp5;
                }
                
                 }
            catch (Exception)
            {

                throw;
            }

        }       
    }
}

我的问题是在backgroundframe =中写什么？背景帧将充当参考框架。



先谢谢。

Avirup Basu

My question is what to write in "backgroundframe="? The backgroundframe will act as a reference frame.

Thanks in Advance.
Avirup Basu

推荐答案

有一吨这里有文章。只需要搜索它们：动作检测网站：codeproject.com [ ^ ]

There's a ton of articles here on it. Just need to search for them: motion detection site:codeproject.com[^]

这篇关于设置背景图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！