android camera2设置白平衡
时间: 2024-01-17 14:04:36 浏览: 216
android camera2
Android Camera2 API提供了多种设置白平衡的方式,包括自动白平衡(AWB)、手动白平衡(MWB)等。下面是设置自动白平衡的示例代码:
1. 首先需要在CameraCaptureSession的创建过程中设置CaptureRequest.CONTROL_AWB_MODE参数为自动白平衡模式:
```java
CaptureRequest.Builder builder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
builder.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest.CONTROL_AWB_MODE_AUTO);
```
2. 如果需要锁定当前的白平衡值,可以设置CaptureRequest.CONTROL_AWB_LOCK参数为true:
```java
builder.set(CaptureRequest.CONTROL_AWB_LOCK, true);
```
3. 如果需要设置白平衡的区域,可以使用CaptureRequest.CONTROL_AWB_REGIONS参数:
```java
MeteringRectangle[] regions = new MeteringRectangle[]{new MeteringRectangle(rect, weight)};
builder.set(CaptureRequest.CONTROL_AWB_REGIONS, regions);
```
其中,rect表示白平衡区域的矩形范围,weight表示该区域的权重。
4. 在CameraCaptureSession的回调函数中,可以获取当前的白平衡状态:
```java
private CameraCaptureSession.CaptureCallback mCaptureCallback = new CameraCaptureSession.CaptureCallback() {
@Override
public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) {
int awbState = result.get(CaptureResult.CONTROL_AWB_STATE);
// 根据awbState的值判断白平衡状态
}
};
```
阅读全文