请再帮我指导一下用C#窗体程序结合Halcon实时对图像中的圆形识别,并对每个圆形提取RGB值后,分别绘制RGB值变化曲线该如何写
时间: 2024-04-18 10:30:34 浏览: 141
要在C#窗体程序中结合Halcon实现实时对图像中的圆形识别,并对每个圆形提取RGB值后分别绘制RGB值变化曲线,你可以按照以下步骤编写代码:
1. 在窗体上添加一个PictureBox控件,用于显示图像。
2. 引用HalconDotNet库。
3. 在窗体的构造函数中初始化Halcon窗口和图像采集设备。
```csharp
using HalconDotNet;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
namespace CircleDetection
{
public partial class MainForm : Form
{
private HWindowControl windowControl;
private HFramegrabber framegrabber;
private List<List<double>> rgbValues;
public MainForm()
{
InitializeComponent();
// 创建Halcon窗口控件
windowControl = new HWindowControl();
windowControl.Dock = DockStyle.Fill;
Controls.Add(windowControl);
// 创建图像采集对象
framegrabber = new HFramegrabber("DirectShow", 1, 1, 0, 0, 0, 0, "default", -1, "default", -1, "false", "default", "default", "default");
// 打开图像采集设备
framegrabber.Open();
// 初始化RGB值列表
rgbValues = new List<List<double>>();
// 启动定时器
timer.Start();
}
private void timer_Tick(object sender, EventArgs e)
{
// 采集图像
HImage image = framegrabber.GrabImageAsync(-1);
// 转换为灰度图像
HImage grayImage = image.Rgb1ToGray();
// 边缘检测
HRegion edges = grayImage.EdgesSubPix("canny", 50, 80, 3);
// 查找圆形
HTuple rows, columns, radius;
HOperatorSet.FindCircle(edges, out rows, out columns, out radius);
// 获取图像的RGB数据
HTuple pointer, type, width, height;
HOperatorSet.GetImagePointer3(image, out pointer, out type, out width, out height);
byte[] imageData = pointer.ToDArr().ToByteArray();
// 存储当前帧的RGB值
List<double> frameRGBValues = new List<double>();
// 遍历每个圆形
for (int i = 0; i < rows.Length; i++)
{
double row = rows[i].D;
double column = columns[i].D;
double circleRadius = radius[i].D;
// 提取圆形RGB值
int centerX = (int)row;
int centerY = (int)column;
int circleSize = (int)circleRadius;
double sumR = 0, sumG = 0, sumB = 0;
for (int x = centerX - circleSize; x <= centerX + circleSize; x++)
{
for (int y = centerY - circleSize; y <= centerY + circleSize; y++)
{
int index = (x * (int)width + y) * 3;
byte red = imageData[index];
byte green = imageData[index + 1];
byte blue = imageData[index + 2];
// 累加RGB值
sumR += red;
sumG += green;
sumB += blue;
}
}
// 计算平均RGB值
double avgR = sumR / ((circleSize * 2 + 1) * (circleSize * 2 + 1));
double avgG = sumG / ((circleSize * 2 + 1) * (circleSize * 2 + 1));
double avgB = sumB / ((circleSize * 2 + 1) * (circleSize * 2 + 1));
// 存储RGB值到当前帧的列表
frameRGBValues.Add(avgR);
frameRGBValues.Add(avgG);
frameRGBValues.Add(avgB);
// 绘制圆形和RGB值
windowControl.HalconWindow.DispObj(edges);
windowControl.HalconWindow.SetColor("red");
windowControl.HalconWindow.DispCircle(row, column, circleRadius);
windowControl.HalconWindow.SetColor("yellow");
windowControl.HalconWindow.DispText(row, column, $"{avgR:0.00}, {avgG:0.00}, {avgB:0.00}");
}
// 存储当前帧的RGB值到总列表
rgbValues.Add(frameRGBValues);
// 绘制RGB值变化曲线
DrawRGBValueCurve();
// 释放资源
grayImage.Dispose();
edges.Dispose();
image.Dispose();
}
private void DrawRGBValueCurve()
{
Bitmap bitmap = new Bitmap(rgbValues.Count, 256);
Graphics graphics = Graphics.FromImage(bitmap);
for (int i = 0; i < rgbValues.Count; i++)
{
List<double> values = rgbValues[i];
for (int j = 0; j < values.Count; j += 3)
{
double r = values[j];
double g = values[j + 1];
double b = values[j + 2];
graphics.DrawLine(Pens.Red, i, 255, i, 255 - (int)r);
graphics.DrawLine(Pens.Green, i, 255, i, 255 - (int)g);
graphics.DrawLine(Pens.Blue, i, 255, i, 255 - (int)b);
}
}
pictureBox.Image = bitmap;
}
protected override void OnFormClosing(FormClosingEventArgs e)
{
// 关闭图像采集设备
framegrabber.Close();
base.OnFormClosing(e);
}
}
}
```
在上述代码中,我们使用了一个定时器来实现定时采集图像和处理。每次定时器触发时,我们采集图像,进行边缘检测和圆形识别,提取圆形的RGB值,并在Halcon窗口中绘制圆形和RGB值。同时,我们将每个帧的RGB值存储在`rgbValues`列表中,并调用`DrawRGBValueCurve`方法绘制RGB值变化曲线。最后,我们在窗体上的PictureBox控件中显示RGB值变化曲线。
请注意,在使用Halcon对象和图像采集设备后,需要在窗体关闭时释放相应的资源。同时,确保你已正确引用HalconDotNet库,并且根据你的实际情况进行相应的配置和参数调整。
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