在图像处理中，如何将位图的字节数组发送到主页面

Question

我正在尝试将字节发送到；alldata。AddRange(("但我想把它作为一条线。例如，我的意思是，我有一个RGB视图640*360。视图的宽度是640。我想把视图640*3=1920(作为一条线(变成灰色，然后把它发送回函数(alldata.AddRange(。如果我发送其中的第360行，我想拍摄图像。我该怎么做？

编辑：我只是稍微修改了一下代码。可能它可以被认为是通过数组在类之间发送数据，我需要将它们分部分发送，而不是认为是图像处理问题。

这是Form1:的代码

using AForge.Video.DirectShow;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace dnm2510img
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public FilterInfoCollection devices;
public VideoCaptureDevice camera;
private void Form1_Load(object sender, EventArgs e)
{
devices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
foreach (FilterInfo item in devices)
{
comboBox1.Items.Add(item.Name);
}
camera = new VideoCaptureDevice();
comboBox1.SelectedIndexChanged += comboBox1_SelectedIndexChanged;
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
if (camera.IsRunning == false)
{
camera = new VideoCaptureDevice(devices[comboBox1.SelectedIndex].MonikerString);
camera.NewFrame += Camera_NewFrame;
camera.Start();
}
}
catch (Exception exc)
{
MessageBox.Show(exc.Message + "");
}
}
public void Camera_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs)
{
List<byte> alldata = new List<byte>();
//byte[] line = new byte[360];
Bitmap image = (Bitmap)eventArgs.Frame.Clone();
byte[] maindata = new byte[image.Height*image.Width*4];
int count = 0;
if(btnapplyWasClicked == true)
{
for (int i = 0; i < image.Height; i++)
{
for (int j = 0; j < image.Width; j++)
{
Color color = image.GetPixel(j, i);
maindata[count] = color.R;
maindata[count + 1] = color.G;
maindata[count + 2] = color.B;
maindata[count + 3] = color.A;
count = count + 4;
for (int k = 1; k <= 360; k++)
{
if (maindata[(count + 4) * k] == maindata[2560 * k])
{
dnm2510img.Gray.GrayFilter(maindata, 2560 * k);
}
}
}
}
//alldata.AddRange(maindata);
}

}

private bool btnapplyWasClicked = false;
//private bool button1WasClicked = false;
//private bool GeriALWasClicked = false;
private void btnapply_Click(object sender, EventArgs e)
{
btnapplyWasClicked = true;
}
private void button1_Click(object sender, EventArgs e)
{
//button1WasClicked = true;
}
}
}

这是灰度的代码：

using AForge.Video.DirectShow;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace dnm2510img
{
public class Gray
{

public static byte[] GrayFilter(byte[] data,int width)
{
List<byte> alldataa = new List<byte>();
for (int i = 0; i < width; i++)
{
int temp =((data[i]+data[i+1]+data[i+2]+data[i+3]) / 4);
data[i] = (byte)temp;
data[i+1] = (byte)temp;
data[i+2] = (byte)temp;
data[i + 3] = (byte)temp;
}
//alldataa.AddRange(data);
return data;
}


}
}

Answer 1

这就是如何将24bpp位图转换为灰度并将其输出到线性阵列的方法：

public static unsafe byte[] ToBgr24To8Mono(Bitmap source)
{
var width = source.Width;
var height = source.Height;
var sourceData = source.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, source.PixelFormat);
var sourceStride = sourceData.Stride;
var sourcePtr = (byte*)sourceData.Scan0;
var targetArray = new byte[width * height];
try
{
Parallel.For(0, height, y =>
{
var sourceRow = sourcePtr + y * sourceStride;
var targetRow =  y * width;
for (int x = 0; x < width; x++)
{
var sourceIndex = (sourceRow + x * 3);
var value = (byte) (sourceIndex[0] * 0.11f + sourceIndex[1] * 0.59f + sourceIndex[2] * 0.3f);
targetArray[targetRow + x] = value;
}
});
}
finally
{
source.UnlockBits(sourceData);
}
return targetArray;
}

如果要使用32位图像作为输入，请将x * 3更改为x * 4。如果您愿意，可以将并行循环切换为常规循环。