安卓相机2照片低质量

Question

我正在制作一个以某种方式拍照的应用程序，我实现了顺序功能，但照片质量很差并且没有对焦，我该如何改进？提前谢谢。

if (null == cameraDevice) {
        Log.e(TAG, "cameraDevice is null");
        return;
    }
    final CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraDevice.getId());
    StreamConfigurationMap streamConfigurationMap = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);

    assert streamConfigurationMap != null;
    Size largest = Collections.max(Arrays.asList(streamConfigurationMap.getOutputSizes(ImageFormat.JPEG)), new CompareSizesByArea());
    final ImageReader reader= ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, /*maxImages*/2);

    final List<Surface> outputSurfaces = new ArrayList<>();
    outputSurfaces.add(reader.getSurface());
    final CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
    captureBuilder.addTarget(reader.getSurface());
    captureBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
    captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, getOrientation());
    reader.setOnImageAvailableListener(onImageAvailableListener, null);

Answer 1

不能保证支持的输出大小列表中的第一个元素是最好的。您必须选择适合您的尺寸。如果 getOutputSizes(( 返回 null，则不应尝试为 1280x720 创建 ImageReader。