有时候想获取照相机图像做特殊操作的时候下面这个代码有用。下面代码也是参考修改来的，为了降低大家检索成本我就复制过来了。
https://library.vuforia.com/articles/Solution/Working-with-the-Camera.html#How-To-Access-the-Camera-Image-in-Unity
public PIXEL_FORMAT mPixelFormat = PIXEL_FORMAT.UNKNOWN_FORMAT;
private bool mAccessCameraImage = true;
private bool mFormatRegistered = false;
void Start()
{
#if UNITY_EDITOR
mPixelFormat = PIXEL_FORMAT.GRAYSCALE; // Need Grayscale for Editor
#else
mPixelFormat = PIXEL_FORMAT.RGB888; // Use RGB888 for mobile
#endif
// Register Vuforia life-cycle callbacks:
VuforiaARController.Instance.RegisterVuforiaStartedCallback(OnVuforiaStarted);
VuforiaARController.Instance.RegisterTrackablesUpdatedCallback(OnTrackablesUpdated);
VuforiaARController.Instance.RegisterOnPauseCallback(OnPause);
}
public void OnVuforiaStarted()
{
// Try register camera image format
if (CameraDevice.Instance.SetFrameFormat(mPixelFormat, true))
{
Debug.Log("Successfully registered pixel format " + mPixelFormat.ToString());
mFormatRegistered = true;
}
else
{
Debug.LogError(
"\nFailed to register pixel format: " + mPixelFormat.ToString() +
"\nThe format may be unsupported by your device." +
"\nConsider using a different pixel format.\n");
mFormatRegistered = false;
}
}
///
/// Called each time the Vuforia state is updated
///
void OnTrackablesUpdated()
{
if (mFormatRegistered)
{
if (mAccessCameraImage)
{
Vuforia.Image image = CameraDevice.Instance.GetCameraImage(mPixelFormat);
if (image != null)
{
Texture2D texture2D = new Texture2D(image.Width,image.Height);
image.CopyToTexture(texture2D);
}
}
}
}
///
/// Called when app is paused / resumed
///
void OnPause(bool paused)
{
if (paused)
{
Debug.Log("App was paused");
UnregisterFormat();
}
else
{
Debug.Log("App was resumed");
RegisterFormat();
}
}
///
/// Register the camera pixel format
///
void RegisterFormat()
{
if (CameraDevice.Instance.SetFrameFormat(mPixelFormat, true))
{
Debug.Log("Successfully registered camera pixel format " + mPixelFormat.ToString());
mFormatRegistered = true;
}
else
{
Debug.LogError("Failed to register camera pixel format " + mPixelFormat.ToString());
mFormatRegistered = false;
}
}
///
/// Unregister the camera pixel format (e.g. call this when app is paused)
///
void UnregisterFormat()
{
Debug.Log("Unregistering camera pixel format " + mPixelFormat.ToString());
CameraDevice.Instance.SetFrameFormat(mPixelFormat, false);
mFormatRegistered = false;
}