Hand gesture recognition and some images

Testing images
- hand02.jpg & hand03.jpg one person
- hand12.jpg & hand13.jpg one person

Code from stackoverflow loading image and converting to ycbcr.
Rest of code is my test.
Filling image holes so it's one object.
Calculating area of the hand.
Counting objects in first 100px of height.
(it would be good to split it by percentage)