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佛山网站建设全方位服务,wordpress抽奖源码,智能网站建设软件有哪些方面,为女足世界杯创建一个网站刚好当前项目有录像功能#xff0c;使用了第三方框架是基于Camera2引擎开发#xff0c;当使用 Camera2 API 开发相机应用时#xff0c;启用和关闭 EIS#xff08;电子防抖#xff09;是一个重要的功能。EIS 可以帮助减少相机拍摄时的抖动#xff0c;从而提高图像和视频的…刚好当前项目有录像功能使用了第三方框架是基于Camera2引擎开发当使用 Camera2 API 开发相机应用时启用和关闭 EIS电子防抖是一个重要的功能。EIS 可以帮助减少相机拍摄时的抖动从而提高图像和视频的稳定性OIS是光学图片想稳定器功能是通过镜头的浮动透镜来纠正“光轴偏移”需要硬件的支持两者同时开启在录像时效果更佳。 EIS原理 使用CCD偏移来实现防抖通过降低图像失真和抖动,从而提高图像质量首先把CCD安置在一个可以上下左右移动的支架上然后当陀螺传感器检测到抖动的时候就会把抖动的方向、速度和移动量等参数经过处理计算出足以抵消抖动的CCD移动量简单说就是通过放大录像焦距根据陀螺仪旋转时预留周边的视角通过进行补帧移动画面给人感觉没有那么抖动但效果没有光学防抖的好。 OIS原理 其原理是通过镜头内的陀螺仪侦测到微小的移动然后将信号传至微处理器处理器立即计算需要补偿的位移量然后通过补偿镜片组根据镜头的抖动方向及位移量加以补偿。 对比开启EIS和OIS的摄像对比 eis开 eis关 1. 检查设备支持的特性 在使用 Camera2 API 开启 EIS 之前我们需要首先检查设备是否支持 EIS 特性。我们可以通过 CameraCharacteristics 类来获取相机设备的特性信息。 CameraManager manager (CameraManager) getSystemService(Context.CAMERA_SERVICE);CameraCharacteristics characteristics manager.getCameraCharacteristics(mCameraDevice.getId());boolean isModeHaveStabilization false; // 支持电子防抖final int[] availableVideoStabilization characteristics.get(CameraCharacteristics.CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES);if (availableVideoStabilization null || availableVideoStabilization.length 0) {Log.e(TAG, Optical stabilization not available);return;}for (int mode : availableVideoStabilization) {if (mode CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE_ON) {isModeHaveStabilization true;Log.d(TAG, Using video stabilization.);break;}}int[] stabilizationModes characteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION);if (stabilizationModes null || stabilizationModes.length 0) {Log.e(TAG, Optical stabilization not available);return;}for (int mode : stabilizationModes) {if (mode CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE_ON) {isModeSupported true; // 支持光学防抖break;}} 2. 启用 EIS和关闭EIS 记得判断是否支持EIS // 开启EIS mPreviewBuilder.set(CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE, CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE_ON);//关闭EIS mPreviewBuilder.set(CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE, CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE_OFF);

1. 启用OIS和关闭OIS captureRequestBuilder.set(CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE,mEisEnabled ? CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE_ON :CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE_OFF); 在创建预览请求的时候注意一定要设置成录制模式预览模式开启不了EIS设置无效 mPreviewBuilder mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); 下面时完整代码片段希望可以帮助到有需要的人 public class Camera2Activity extends AppCompatActivity {private static final String TAG Camera2Example;private TextureView mTextureView;private CameraDevice mCameraDevice;private CaptureRequest.Builder mPreviewBuilder;private CameraCaptureSession mCaptureSession;// private SurfaceTexture mSurfaceTexture;private Button captureModel;//private Camera2Helper mCamera2Helper;boolean mEisEnabled true;private Handler backgroundHandler;private HandlerThread backgroundThread;SuppressLint(MissingInflatedId)Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_camera);initView();}private void initView() {captureModel (Button) findViewById(R.id.captureModel);mTextureView findViewById(R.id.textureView);mCaptureButton findViewById(R.id.captureButton);if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) ! PackageManager.PERMISSION_GRANTED) {ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO, Manifest.permission.CAMERA}, 200);return;}findViewById(R.id.eisopen).setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View v) {enableEis();}});findViewById(R.id.eisclose).setOnClickListener(v - {disableEis();});captureModel.setOnClickListener(v - {switchMode();});}private TextureView.SurfaceTextureListener textureListener new TextureView.SurfaceTextureListener() {Overridepublic void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {openCamera();}Overridepublic void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {}Overridepublic boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {return false;}Overridepublic void onSurfaceTextureUpdated(SurfaceTexture surface) {}};//打开相机public void openCamera() {CameraManager cameraManager (CameraManager) getSystemService(Context.CAMERA_SERVICE);try {String cameraId cameraManager.getCameraIdList()[0];if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) ! PackageManager.PERMISSION_GRANTED) {// 请求权限ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 200);return;}cameraManager.openCamera(cameraId, new CameraDevice.StateCallback() {Overridepublic void onOpened(NonNull CameraDevice camera) {mCameraDevice camera;createCameraPreviewSession();}Overridepublic void onDisconnected(NonNull CameraDevice camera) {mCameraDevice.close();mCameraDevice null;}Overridepublic void onError(NonNull CameraDevice camera, int error) {mCameraDevice.close();mCameraDevice null;}}, null);} catch (CameraAccessException e) {e.printStackTrace();}}// 创建CameraCaptureSessionprivate void createCameraPreviewSession() {try {SurfaceTexture texture mTextureView.getSurfaceTexture();// 设置预览尺寸texture.setDefaultBufferSize(mTextureView.getWidth(), mTextureView.getHeight());assert texture ! null;// 创建预览SurfaceSurface surface new Surface(texture);// 创建CaptureRequest.BuildermPreviewBuilder mCameraDevice.createCaptureRequest(mCurrentMode);// 设置自动对焦模式mPreviewBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);// 设置自动曝光模式mPreviewBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH);mPreviewBuilder.addTarget(surface);toggleStabilization(mPreviewBuilder);// 创建CameraCaptureSessionmCameraDevice.createCaptureSession(Collections.singletonList(surface),new CameraCaptureSession.StateCallback() {Overridepublic void onConfigured(NonNull CameraCaptureSession cameraCaptureSession) {// 相机已经关闭if (null mCameraDevice) {return;}// 会话准备好后我们开始显示预览mCaptureSession cameraCaptureSession;updatePreview();}Overridepublic void onConfigureFailed(NonNull CameraCaptureSession cameraCaptureSession) {// showToast(Failed);}}, backgroundHandler);} catch (CameraAccessException e) {e.printStackTrace();}}int mCurrentMode CameraDevice.TEMPLATE_PREVIEW;// 在点击按钮时切换模式private void switchMode() {if (mCurrentMode CameraDevice.TEMPLATE_PREVIEW) {// 切换到录制模式mCurrentMode CameraDevice.TEMPLATE_RECORD;createCameraPreviewSession();captureModel.setText(切换到预览模式);} else {// 切换到预览模式mPreviewBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_CANCEL);mCurrentMode CameraDevice.TEMPLATE_PREVIEW;createCameraPreviewSession();captureModel.setText(切换到录制模式);}}// 电子防抖和光学防抖private void toggleStabilization(CaptureRequest.Builder captureRequestBuilder) {if (mPreviewBuilder null) {return;}try {CameraManager manager (CameraManager) getSystemService(Context.CAMERA_SERVICE);CameraCharacteristics characteristics manager.getCameraCharacteristics(mCameraDevice.getId());boolean isModeHaveStabilization false; // 支持电子防抖boolean isModeSupported false; // 支持光学防抖final int[] availableVideoStabilization characteristics.get(CameraCharacteristics.CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES);if (availableVideoStabilization null || availableVideoStabilization.length 0) {Log.e(TAG, Optical stabilization not available);return;}for (int mode : availableVideoStabilization) {if (mode CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE_ON) {isModeHaveStabilization true;Log.d(TAG, Using video stabilization.);break;}}// 开启EIS电子防抖功能if (mEisEnabled isModeHaveStabilization) {mPreviewBuilder.set(CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE, CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE_ON);mPreviewBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_USE_SCENE_MODE);mPreviewBuilder.set(CaptureRequest.CONTROL_SCENE_MODE, CameraMetadata.CONTROL_SCENE_MODE_ACTION); // hrd 动作场景模式} else {mPreviewBuilder.set(CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE, CaptureRequest.CONTROL_VIDEO_STABILIZATION_MODE_OFF);mPreviewBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_USE_SCENE_MODE);mPreviewBuilder.set(CaptureRequest.CONTROL_SCENE_MODE, CameraMetadata.CONTROL_SCENE_MODE_ACTION); // hrd 动作场景模式}int[] stabilizationModes characteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION);if (stabilizationModes null || stabilizationModes.length 0) {Log.e(TAG, Optical stabilization not available);return;}for (int mode : stabilizationModes) {if (mode CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE_ON) {isModeSupported true;break;}}// 开启OIS光学防抖功能if (isModeSupported) {captureRequestBuilder.set(CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE,mEisEnabled ? CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE_ON :CaptureRequest.LENS_OPTICAL_STABILIZATION_MODE_OFF);}} catch (CameraAccessException e) {e.printStackTrace();}}// 更新预览private void updatePreview() {if (null mCameraDevice) {return;}try {mCaptureSession.setRepeatingRequest(mPreviewBuilder.build(), null, backgroundHandler);} catch (CameraAccessException e) {e.printStackTrace();}}// 开启EIS电子防抖功能private void enableEis() {mEisEnabled true;toggleStabilization(mPreviewBuilder);updatePreview();}// 关闭EIS电子防抖功能private void disableEis() {mEisEnabled false;toggleStabilization(mPreviewBuilder);updatePreview();}Overrideprotected void onResume() {super.onResume();startBackgroundThread();if (mTextureView.isAvailable()) {openCamera();} else {mTextureView.setSurfaceTextureListener(textureListener);}}Overrideprotected void onPause() {super.onPause();stopBackgroundThread();closeCamera();}private void closeCamera() {if (mCaptureSession ! null) {mCaptureSession.close();mCaptureSession null;}if (mCameraDevice ! null) {mCameraDevice.close();mCameraDevice null;}}private void startBackgroundThread() {backgroundThread new HandlerThread(CameraBackground);backgroundThread.start();backgroundHandler new Handler(backgroundThread.getLooper());}private void stopBackgroundThread() {backgroundThread.quitSafely();try {backgroundThread.join();backgroundThread null;backgroundHandler null;} catch (InterruptedException e) {e.printStackTrace();}} } 翻译 搜索 复制