BUG: The rectangle position of face detection isn't correct.

[Aress Hsiao]

If enable the face detection and use the Camera2 API on the Tablet.
The rectangle position of face detection isn't correct on the front camera.

I think is the calculateCameraToPreviewMatrix method in the Preview.java doesn't have considered if the app is work on the Tablet.
Usually, the tablet camera orientation is 0 degree and the smartphone camera orientation is 90 or 270 degree.

[Mark]

Just to clarify, does it work okay when using the old Camera API?

[Aress Hsiao]

Yes, it works okay when using the old Camera API.
I had to change code in the Preview.java to let it work okay. It's maybe
can help you.

        // Unfortunately the transformation for Android L API isn't

documented, but this seems to work for Nexus 6.
// This is the equivalent code for
android.hardware.Camera.setDisplayOrientation, but we don't actually use
setDisplayOrientation()
// for CameraController2, except testing on Nexus 6 shows that
we shouldn't change "result" for front facing camera.
boolean mirror = (camera_controller.getFacing() ==
CameraController.Facing.FACING_FRONT);

• camera_to_preview_matrix.setScale(1, mirror ? -1 : 1);
• if (camera_controller.getCameraOrientation() == 0 ||
  camera_controller.getCameraOrientation() == 180)
• camera_to_preview_matrix.setScale(mirror ? -1 : 1, 1);
• else
• camera_to_preview_matrix.setScale(1, mirror ? -1 : 1);

Best regards,
Aress.

Mark mark-h@users.sourceforge.net 於 2020年7月23日 週四 上午6:50寫道：

Just to clarify, does it work okay when using the old Camera API?

BUG: The rectangle position of face detection isn't correct.
https://sourceforge.net/p/opencamera/discussion/general/thread/1a5f86e6ff/?limit=25#0d89/0cda

---

Sent from sourceforge.net because you indicated interest in
https://sourceforge.net/p/opencamera/discussion/general/

To unsubscribe from further messages, please visit
https://sourceforge.net/auth/subscriptions/

[Mark]

Thanks! I'll take a look.

[Mark]

By the way, what device do you have? (My tablets have 90 degree as camera orientation, same as phones, so just want to see if I have something to test on too.)

[Aress Hsiao]

My device camera default orientation is 0 and the same as the device screen orientation.
I use the device is my company developing products. it's not a consumer product. Maybe it isn't happening on tablets on the consumer market.