我目前正在开发 Androids Camera 2 API,当前的问题是我无法设置“CONTROL_AE_EXPOSURE_COMPENSATION”。
我的代码:
-1.0
public void setExposure(double exposureAdjustment) {
Range<Integer> range1 = mCameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_COMPENSATION_RANGE);
int minExposure = range1.getLower();
int maxExposure = range1.getUpper();
float newCalculatedValue = 0;
if (exposureAdjustment >= 0) {
newCalculatedValue = (float) (minExposure * exposureAdjustment);
} else {
newCalculatedValue = (float) (maxExposure * -1 * exposureAdjustment);
}
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, (int) newCalculatedValue);
}
不幸的是它不起作用。
我找到了一个适合我的解决方案。由此exposureAdjustment
参数在-1到+1之间。
public void setExposure(double exposureAdjustment) {
Range<Integer> range1 = mCameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_COMPENSATION_RANGE);
int minExposure = range1.getLower();
int maxExposure = range1.getUpper();
if (minExposure != 0 || maxExposure != 0) {
float newCalculatedValue = 0;
if (exposureAdjustment >= 0) {
newCalculatedValue = (float) (minExposure * exposureAdjustment);
} else {
newCalculatedValue = (float) (maxExposure * -1 * exposureAdjustment);
}
if (mPreviewRequestBuilder != null) {
try {
CaptureRequest captureRequest = mPreviewRequestBuilder.build();
mCaptureSession.setRepeatingRequest(captureRequest, camera2FocusMeteringManager.mCaptureCallbackListener, mBackgroundHandler);
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, (int) newCalculatedValue);
mCaptureSession.capture(captureRequest, camera2FocusMeteringManager.mCaptureCallbackListener, mBackgroundHandler);
} catch (CameraAccessException e) {
}
}
}
}
我在哪里建造一个新的CaptureRequest
via my mPreviewRequestBuilder
(捕捉请求的构建器)每次曝光调整。
Here https://github.com/ManuelSchmitzberger/Camera2您可以找到完整的 Camera2 示例。
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