Question

我尝试使用camera2 API捕获图像。有时它会给出一些损坏/不完整的图像。

我要实现的流程是什么？单击图像->使用ImageReader收听注册摄像机的捕获->将这些字节提供给将图像保存在图库中的函数。

这将导致图像不完整/损坏。（并非总是如此，但至少有五分之三。）

我几乎尝试了所有可以在网上找到的东西。我认为这里的代码流有问题。

下面的代码是开始捕获的过程。

mState =“ CLICK”; cameraCaptureSessions？.capture（captureRequestBuilder？.build（），captureCallback，mBackgroundHandler）

Capture Builder，用于将Surface设置为图像读取器并创建以下捕获会话：

var capture_builder = 
cameraDevice!!.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE)

capture_builder.addTarget(reader.surface)
var rotation = getWindowManager().getDefaultDisplay().getRotation();
capture_builder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));
capture_builder.set(CaptureRequest.JPEG_QUALITY, 70);

capture_builder.set(CaptureRequest.NOISE_REDUCTION_MODE,CameraCharacteristics.NOISE_REDUCTION_MODE_HIGH_QUALITY)
            capture_builder.set(CaptureRequest.CONTROL_AF_MODE,CameraCharacteristics.CONTROL_AF_MODE_CONTINUOUS_PICTURE)

val captureCallback_in = object : CameraCaptureSession.CaptureCallback() {
    override fun onCaptureProgressed(session: CameraCaptureSession,
                                                 request: CaptureRequest,
                                                 partialResult: CaptureResult) 
    {}

override fun onCaptureCompleted(session: CameraCaptureSession,
                                                request: CaptureRequest,
                                                result: TotalCaptureResult) {
    cameraCaptureSessions = session



 cameraCaptureSessions?.capture(captureRequestBuilder?.build(),captureCallback,mBackgroundHandler) mState = "PREVIEW";

cameraCaptureSessions?.setRepeatingRequest(captureRequestBuilder?.build(), 
    captureCallback, mBackgroundHandler);
                }
            }
    cameraCaptureSessions!!.stopRepeating()
    cameraCaptureSessions!!.capture(capture_builder.build(), 
    captureCallback_in,mBackgroundHandler);

这是图像侦听器，用于从图像获取字节：

private var readerListener = ImageReader.OnImageAvailableListener {

    var image: Image? = null;
        try {

            image = it.acquireLatestImage()
            var buffer = image.getPlanes()[0].getBuffer();
            buffer.rewind()
            var bytes = ByteArray(buffer.remaining())
            buffer.get(bytes);

            onPictureTaken(bytes);

        } catch (e: FileNotFoundException) {
            e.printStackTrace();
        } catch (e: IOException) {
            e.printStackTrace();
        } finally {
            if (image != null) {
                image.close();
            }


        }
    }

OnPictureTaken将图像保存到图库。

Android Camera API 2在捕获时创建损坏的图像

0 个答案: