安装opencv：pip install opencv-python

安装mediapipe：pip install mediapipe

 

 

draw_utils.py:

import cv2
import numpy as np


def draw_line(img, width, height,  hand, start_index, stop_index):
    for i in range(start_index, stop_index):
        x1, y1 = int(hand.landmark[i].x * width), int(hand.landmark[i].y * height)
        x2, y2 = int(hand.landmark[i + 1].x * width), int(hand.landmark[i + 1].y * height)
        cv2.line(img, (x1, y1), (x2, y2), (255, 255, 255), 2)


def draw_hand(img, width, height, hand):
    # 画圆
    for i in range(21):
        pos_x = hand.landmark[i].x * width  # hand.landmark[i].x为归一化后的