- Grab an ROI
- Calculate a running average background value for 60 frames of video
- Once avg value is found, then the hand can enter the ROI.
- Set an ROI and calculate the average running value for some amount of frames.
- Then once a hand enters, we can detect a change and apply thresholding.
- Once the hand enters the ROI, we will use a Convex Hull to draw a polygon around the hand.
- Using some math, we ll calculate the center of the hand against the angle of outer points to infer finger count.
- First we will calculate the most extreme points (top, bottom, left, and right)
- We can then calculate their intersection and estimate that as the center of the hand
- Next we will calculate the distance for the point furthest away from the center
- Then using a ratio of that distance we create a circle
- Any points outside of this circle and far away enough from the bottom, should be extended fingers!
depend on Jose Portilla course