Background
To make some finger-related measurements (in centimeters) without a reference object, I am planning to use the Mediapipe Hand-Landmarker model to detect specific landmarks and then use the hand_world_landmarks property of the HandLandmarkerResult class to calculate the pixel-per-metric value. I wasn’t sure if this would work, but I tested this out on a couple of images and it seemed to work.
Question
Now, I want to extend this to measure the finger depths and I was wondering if the z axis value of hand_world_landmarks would be a good estimator for this? If not, are there any alternate ways I can achieve this (using Mediapipe)?