How to get face rotation angles in degrees?

[IgorSamer]

Hi! I noticed that in the default labels the rotation angle values are shown in degrees. But looking into face.rotation.angles the result is:

{ pitch: -0.12624927651314846, yaw: 0.34794775363718944, roll: -0.1220533528063716 }

What is the correct calc to transform these values into degrees as in labels?

Thanks!

[IgorSamer]

Okay, after a few tries I found out that just multiplying the values by 60 to do the conversion :)

[vladmandic]

close, but not really :)

values are in radians, so to get degrees its (angle * 180 / Math.PI) which is 57.2957795 - so almost 60 :)

[kekoleg]

That's weird, but I have to do an additional division by 2 to get the perfect portrait rotation.
-(detectedFace.rotation.angle.roll * 180 / Math.PI / 2).toFixed(1)
Why is it working? Could you tell where do those radian values come from? Straight from TF?

platform: darwin arm64
agent: NodeJS v16.19.0
tfjs: 4.7.0

[vladmandic]

face points come from model execution, angles come from matrix math on specific keypoints placed in a plane.
why do you need additional /2? it all depends what do you consider as normalized values.

[kekoleg]

I wanted to calculate a face rotation that would horizontally align the eyes, so I use only angle.roll. Standard formula without / 2 always gives me overrotation.

Well thanks for the reply anyway, I'm curious to try other models and see what happens.

[kekoleg]

Oh, now I see why / 2 helps – 5ed2e15#diff-cba56667d3c1433909d82a858f5c99730ba61f0e346b9e76c0c6465c2ee846a0
Maybe it's not supposed to be there