MouseControl/HandPattern.py at main · lrongyi/MouseControl · GitHub

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import math

class handPattern():
    def __init__(self):
        self.thumb = [4, 3, 2, 1]
        self.index = [8, 7, 6, 5]
        self.middle = [12, 11, 10, 9]
        self.ring = [16, 15, 14, 13]
        self.pinky = [20, 19, 18, 17]

    def getDist(self, marker1, marker2, landmarks):
        return math.hypot(landmarks[marker1][1] - landmarks[marker2][1], landmarks[marker1][2] - landmarks[marker2][2])

    def isFingerCurled(self, finger, landmarks):
        dist_tip_mcp = self.getDist(finger[0], finger[3], landmarks)
        palm_height = self.getDist(self.middle[3], 0, landmarks)

        return dist_tip_mcp <= (0.65 * palm_height)

    def isThumbExtended(self, landmarks):
        thumbtip = landmarks[self.thumb[0]]
        thumbip = landmarks[self.thumb[1]]
        thumbmcp = landmarks[self.thumb[2]]
        pinkymcp = landmarks[self.pinky[3]]
        indexmcp = landmarks[self.index[3]]

        if indexmcp[1] > pinkymcp[1]:
            return thumbmcp[1] < thumbip[1] < thumbtip[1]
        else:
            return thumbmcp[1] > thumbip[1] > thumbtip[1]


    def isFist(self, landmarks):
        if not landmarks or len(landmarks) < 21:
            return False

        thumbcheck = not self.isThumbExtended(landmarks)
        indexcheck = self.isFingerCurled(self.index, landmarks)
        middlecheck = self.isFingerCurled(self.middle, landmarks)
        ringcheck = self.isFingerCurled(self.ring, landmarks)
        pinkycheck = self.isFingerCurled(self.pinky, landmarks)

        return thumbcheck and indexcheck and middlecheck and ringcheck and pinkycheck

    def isPointer(self, landmarks):
        if not landmarks or len(landmarks) < 21:
            return False

        thumbcheck = not self.isThumbExtended(landmarks)
        indexcheck = not self.isFingerCurled(self.index, landmarks)
        middlecheck = self.isFingerCurled(self.middle, landmarks)
        ringcheck = self.isFingerCurled(self.ring, landmarks)
        pinkycheck = self.isFingerCurled(self.pinky, landmarks)


        return thumbcheck and indexcheck and middlecheck and ringcheck and pinkycheck

    def isGun(self, landmarks):
        if not landmarks or len(landmarks) < 21:
            return False

        indexcheck = not self.isFingerCurled(self.index, landmarks)
        middlecheck = self.isFingerCurled(self.middle, landmarks)
        ringcheck = self.isFingerCurled(self.ring, landmarks)
        pinkycheck = self.isFingerCurled(self.pinky, landmarks)
        thumbcheck = self.isThumbExtended(landmarks)

        return thumbcheck and indexcheck and middlecheck and ringcheck and pinkycheck