捕获的相机图像看起来很模糊

Question

我的问题捕获图像在我的应用程序中显得模糊,因为使用设备相机组件捕获的图像看起来很好 - 一旦用户单击捕获按钮,就会发生自动缩放效果.有人可以帮助我实现这种情况我应该如何以及在哪里应用.

这是代码:

public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {
    // Now that the size is known, set up the camera parameters and begin
    // the preview.
    Camera.Parameters parameters = camera.getParameters();
    Integer version = Integer.parseInt(Build.VERSION.SDK);
    if(version > Build.VERSION_CODES.ECLAIR_MR1)
    {
        Log.d(TAG, "------> version greater than eclari 2.1");
        List<Size> sizes = parameters.getSupportedPreviewSizes();
        Size optimalSize = getOptimalPreviewSize(sizes, width, height);
        parameters.setPreviewSize(optimalSize.width, optimalSize.height);
    }
    else
    {
        Log.d(TAG, "------> version less than eclari 2.1");
        parameters.setPreviewSize(ApplicationInitiator.screenW,ApplicationInitiator.screenH); 
    }

    List<String> focusModes = parameters.getSupportedFocusModes();
    if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO))
    {
        parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
    }

    parameters.setJpegQuality(100);
    camera.setParameters(parameters);
    camera.startPreview();
}

Answer 1

好吧,在你的文字上你谈到捕捉一个图像,但我没有在你的代码中看到任何关于拍照的东西,无论如何,如果你想获得一张聚焦的照片,你要做的就是注册一个AutoFocusCallback来拍摄一张照片.获得焦点时的图片:

Camera.AutoFocusCallback mAutoFocusCallback = new Camera.AutoFocusCallback() {
    @Override
    public void onAutoFocus(boolean success, Camera camera) {
        camera.takePicture(null, null, mPictureCallbackRaw);
    }
};

Camera.PictureCallback mPictureCallbackRaw = new Camera.PictureCallback() {  
    public void onPictureTaken(byte[] data, Camera c) { 
        // (...)            
    }  
};

public void takeFocusedPicture() {
    mCamera.autoFocus(mAutoFocusCallback);
}

.