C# VideoCapture通过下拉框更改摄像头分辨率
时间: 2024-05-13 12:18:51 浏览: 181
C#对摄像头进行操作
要通过下拉框更改摄像头分辨率,你需要使用VideoCapture类的Set方法设置摄像头的分辨率。你可以使用下拉框选项的SelectedIndexChanged事件来触发更改分辨率的代码。下面是一个示例代码:
```
private VideoCapture capture;
private int selectedResolutionIndex;
private void Form1_Load(object sender, EventArgs e)
{
capture = new VideoCapture(0); // 初始化摄像头
selectedResolutionIndex = 0; // 默认选择第一个分辨率
comboBoxResolutions.SelectedIndex = selectedResolutionIndex; // 初始化下拉框
}
private void comboBoxResolutions_SelectedIndexChanged(object sender, EventArgs e)
{
selectedResolutionIndex = comboBoxResolutions.SelectedIndex;
SetCaptureResolution();
}
private void SetCaptureResolution()
{
// 获取所有可用的分辨率
var resolutions = capture.GetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameHeight).ToArray();
int width = 640;
int height = 480;
// 根据选择的下拉框项确定分辨率
switch (selectedResolutionIndex)
{
case 0:
width = 640;
height = 480;
break;
case 1:
width = 1280;
height = 720;
break;
case 2:
width = 1920;
height = 1080;
break;
}
capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameWidth, width);
capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameHeight, height);
}
```
在上面的代码中,我们在窗体加载时初始化了摄像头,并将默认的分辨率选择为第一个下拉框项。当选择下拉框项时,我们会将选择的下拉框索引存储在selectedResolutionIndex变量中,并调用SetCaptureResolution()方法来设置摄像头的分辨率。在SetCaptureResolution()方法中,我们使用switch语句根据选择的下拉框项来确定分辨率,然后使用VideoCapture类的SetCaptureProperty()方法来设置摄像头的分辨率。
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