ARKit和Vuforia - 标记识别 [英] ARKit and Vuforia - marker recognition

问题描述

我正在开发iOS应用程序，我需要识别一个标记（很可能是QR代码）并使用ARKit在其上放置一些3D内容。

<我正在考虑Vuforia和ARKit的组合。

是否可以仅使用Vuforia来识别标记并获得其位置，然后将此数据传递给ARKit？

• 我需要识别标记才能选择相应的3D内容。


• 为了在那里放置3D内容，我需要获取标记的位置，之后我想使用ARKit进行跟踪。

有可能吗？

还有另一种可以与ARKit一起使用的标记识别解决方案吗？

解决方案

Q1：
您可以处理标记的识别（在Vuforia中称为图像目标）
创建脚本：

 公共类CustomTrackableEventHandler：MonoBehaviour，
 ITrackableEventHandler 
 {
 ... 
 
 public void OnTrackableStateChanged（
 TrackableBehaviour.Status previousStatus，
 TrackableBehaviour.Status newStatus）
 {
 if（newStatus == TrackableBehaviour.Status.DETECTED || 
 newStatus == TrackableBehaviour。 Status.TRACKED || 
 newS tatus == TrackableBehaviour.Status.EXTENDED_TRACKED）
 {
 OnTrackingFound（）; 
 // ****你自己的逻辑**** 
} 
其他
 {
 OnTrackingLost（）; 
} 
} 
} 
  

然后你可以替换DefaultTrackableEventHandler用这个脚本。

Q2：我需要获得标记的位置，以便在那里放置3D内容，之后我想使用ARKit进行跟踪。

你可以添加一个空的游戏object为标记的子级（ImageTarget），层次结构为：

  YourMarker（ImageTarget）
 | __EmptyPlaceHolder 
  

识别出标记后，您可以编程方式获取其位置：

  var placeHolder = GameObject.Find（EmptyPlaceHolder）; 
 if（placeHolder！= null）{
 Debug.Log（placeHolder.transform.position）; //所有的位置，localPosition，四元数等都可以使用
 
} 
  

I'm working on an iOS app, I need to recognize a marker (most likely it will be QR code) and place some 3D content over it using ARKit.

I was thinking about a combination of Vuforia and ARKit.

Is it possible to use Vuforia only to recognize the marker and get its position, and then "pass" this data to ARKit?

• I need to recognize the marker in order to select corresponding 3D content.
• I need to get the position of the marker only ones, in order to place 3D content there, after that I want to use ARKit for tracking.

Is it possible?
Is there another solution for marker recognition which can be used with ARKit?

解决方案

Q1: You can handle the recognition of the marker (called Image Target in Vuforia) Create a script:

public class CustomTrackableEventHandler : MonoBehaviour,
                                           ITrackableEventHandler
{
    ...

    public void OnTrackableStateChanged(
                                    TrackableBehaviour.Status previousStatus,
                                    TrackableBehaviour.Status newStatus)
    {
        if (newStatus == TrackableBehaviour.Status.DETECTED ||
            newStatus == TrackableBehaviour.Status.TRACKED ||
            newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
        {
            OnTrackingFound(); 
            // **** Your own logic here ****
        }
        else
        {
            OnTrackingLost();
        }
    }
}

Then you can replace the DefaultTrackableEventHandler with this this script.

Q2: I need to get the position of the marker only ones, in order to place 3D content there, after that I want to use ARKit for tracking.

You can add an empty game object to be the child of the marker (ImageTarget), and the hierarchy would be:

YourMarker(ImageTarget)
     |__EmptyPlaceHolder

When the marker is recognised, you can then programatically get its location:

var placeHolder = GameObject.Find("EmptyPlaceHolder");
if(placeHolder != null){
    Debug.Log(placeHolder.transform.position); // all the location, localPosition, quaternion etc will be available to you

}

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