如何强制Android相机以纵向模式显示，或者让我进行旋转

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问题描述

我是新的发布，所以请好好！我已经看过几乎所有其他与此相关的问题，并尝试最多，但完全沮丧。我只想让我的Android手机以纵向模式显示相机，而不是横向。我只是修改随opencv提供的ImageManipulations示例。

I'm new to posting so please be nice! I have looked at practically all the other questions related to this and tried most, but am completely frustrated. I simply want to have my Android phone display the camera in portrait mode, not landscape. I am simply modifying the ImageManipulations sample that is provided with opencv.

我使用opencv 3.01，Android sdk版本23，Android Studio 2.0和Nexus 5手机Android版本6.0.1。这是4/28/2016，这是一切的最近的稳定版本。

I'm using opencv 3.01, Android sdk version 23, Android Studio 2.0, and a Nexus 5 phone with Android version 6.0.1. This is 4/28/2016 and this is pretty much the most current stable version of everything.

我已经强制该应用程序进入肖像模式在AndroidManifest.xml文件与：

I have already forced the app into portrait mode in the AndroidManifest.xml file with:

              android:screenOrientation="portrait"

，并且整个应用程序在纵向模式下正确显示，但显示的摄像机图像旋转90度。换句话说，如果你将头部向左倾斜90度，你会看到合适的图像。

and the entire app is correctly displayed in portrait mode, but the camera image that is displayed is rotated 90 degrees. In other words, if you tilt your head to the left 90 degrees you will see the appropriate image. So I need to rotate the image to the right.

我尝试使用opencv Tutorial3代码和setDisplayOrientation（90）：

I tried using the opencv Tutorial3 code and setDisplayOrientation(90):

public void setResolution(Size resolution) {
    disconnectCamera();
    mMaxHeight = resolution.height;
    mMaxWidth = resolution.width;
    // mCamera.setDisplayOrientation(90);  //* Crashes if placed here
    connectCamera(getWidth(), getHeight());
    mCamera.setDisplayOrientation(90);  //* Doesn't crash if here, but doesn't work either
}

并没有工作。在任何情况下，本教程使用相机类，已在Android版本21中弃用，并被替换为camera2类。我没有去更远的地方，因为我想使用最新的API，但也许在camera2的东西可以工作吗？

and that didn't work. And in any case this tutorial uses the "camera" class that was deprecated in Android version 21, and was replaced with the "camera2" class. I didn't go any farther on this because I wanted to use the most current APIs, but maybe something in camera2 could work?

有些人发布了关于使用转置和flip函数来旋转图像，我试着在onCameraFrame方法中这么做：

Some people posted about using "transpose" and "flip" functions to rotate the image and I tried doing this many ways in the onCameraFrame method:

原始的，旋转的：

    public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
    Mat rgba = inputFrame.rgba();
    ... do stuff to the image ...
    return rgba;

图像显示变暗，我的FPS计算变为零（奇怪）::

Image display goes dark, my FPS calculation goes to zero (weird)::

    public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
    Mat rgba = inputFrame.rgba();

    // Rotate clockwise 90 degrees
    Core.transpose(rgba, rgba);
    Core.flip(rgba, rgba, 1);
    ... do stuff to the image ...
    return rgba;

旋转180度并再次显示视频，现在翻转，但仍处于横向模式：

Rotated 180 degrees and video displays again, now flipped over, but still landscape mode:

    public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
    Mat rgba = inputFrame.rgba();

    // Rotate clockwise 90 degrees, then 90 degrees again
    Core.transpose(rgba, rgba);
    Core.flip(rgba, rgba, 1);
    Core.transpose(rgba, rgba);
    Core.flip(rgba, rgba, 1);
    ... do stuff to the image ...
    return rgba;

因此，看起来像onCameraFrame返回一个与原始图像具有不同分辨率的Mat，。 onCameraFrame的文档是粗略的 - 所以，这是真的吗？

So it looks like if onCameraFrame returns a Mat with a different resolution from the original, the display goes blank. The documentation on onCameraFrame is sketchy - so, is this true?

有没有另一个地方，我应该在调用onCameraFrame之前做这个图像旋转？有没有另一种方法，我可以简单地强制相机以纵向模式提供框架？

Is there another place where I should be trying to do this image rotation before onCameraFrame is called? Is there another way that I can simply force the camera to provide the frame in portrait mode instead?

goes

如何强制Android相机以纵向模式显示，或者让我进行旋转

问题描述

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