運(yùn)行效果

基于Mediapipe的手勢(shì)識(shí)別，完成的手勢(shì)識(shí)別游戲。運(yùn)行效果圖如下：

首先是初始的界面效果圖：

游戲規(guī)則：屏幕上會(huì)出現(xiàn)蚊子和蜜蜂，當(dāng)手蜷曲握起時(shí)，表示抓的動(dòng)作。如果抓到右邊移動(dòng)的蚊子，則會(huì)增加分?jǐn)?shù)，如果抓到右邊的蜜蜂，則會(huì)出現(xiàn)被蟄到的聲音 ：）

代碼介紹

調(diào)用Mediapipe，定義與手勢(shì)識(shí)別有關(guān)的類(lèi)：

這里完成了對(duì)圖片鏡像的翻轉(zhuǎn)，在圖上畫(huà)出手勢(shì)線(xiàn)條，并對(duì)手勢(shì)的握起狀態(tài)邏輯進(jìn)行判斷。

import cv2
import mediapipe as mp
from settings import *
import numpy as np
mp_drawing = mp.solutions.drawing_utils
mp_drawing_styles = mp.solutions.drawing_styles
mp_hands = mp.solutions.hands



class HandTracking:
    def __init__(self):
        self.hand_tracking = mp_hands.Hands(min_detection_confidence=0.5, min_tracking_confidence=0.5)
        self.hand_x = 0
        self.hand_y = 0
        self.results = None
        self.hand_closed = False


    def scan_hands(self, image):
        rows, cols, _ = image.shape

        # Flip the image horizontally for a later selfie-view display, and convert
        # the BGR image to RGB.
        image = cv2.cvtColor(cv2.flip(image, 1), cv2.COLOR_BGR2RGB)
        # To improve performance, optionally mark the image as not writeable to
        # pass by reference.
        image.flags.writeable = False
        self.results = self.hand_tracking.process(image)

        # Draw the hand annotations on the image.
        image.flags.writeable = True
        image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)

        self.hand_closed = False

        print(self.results.multi_hand_landmarks)

        if self.results.multi_hand_landmarks:
            for hand_landmarks in self.results.multi_hand_landmarks:
                x, y = hand_landmarks.landmark[9].x, hand_landmarks.landmark[9].y

                self.hand_x = int(x * SCREEN_WIDTH)
                self.hand_y = int(y * SCREEN_HEIGHT)

                x1, y1 = hand_landmarks.landmark[12].x, hand_landmarks.landmark[12].y

                if y1 > y:
                    self.hand_closed = True

                mp_drawing.draw_landmarks(
                    image,
                    hand_landmarks,
                    mp_hands.HAND_CONNECTIONS,
                    mp_drawing_styles.get_default_hand_landmarks_style(),
                    mp_drawing_styles.get_default_hand_connections_style())
        return image

    def get_hand_center(self):
        return (self.hand_x, self.hand_y)


    def display_hand(self):
        cv2.imshow("image", self.image)
        cv2.waitKey(1)

    def is_hand_closed(self):

        pass

定義游戲類(lèi)：

這里導(dǎo)入了音效和背景，并加載界面上方的分?jǐn)?shù)和剩余時(shí)間等。

import pygame
import time
import random
from settings import *
from background import Background
from hand import Hand
from hand_tracking import HandTracking
from mosquito import Mosquito
from bee import Bee
import cv2
import ui

class Game:
    def __init__(self, surface):
        self.surface = surface
        self.background = Background()

        # Load camera
        self.cap = cv2.VideoCapture(0)

        self.sounds = {}
        self.sounds["slap"] = pygame.mixer.Sound(f"Assets/Sounds/slap.wav")
        self.sounds["slap"].set_volume(SOUNDS_VOLUME)
        self.sounds["screaming"] = pygame.mixer.Sound(f"Assets/Sounds/screaming.wav")
        self.sounds["screaming"].set_volume(SOUNDS_VOLUME)


    def reset(self): # reset all the needed variables
        self.hand_tracking = HandTracking()
        self.hand = Hand()
        self.insects = []
        self.insects_spawn_timer = 0
        self.score = 0
        self.game_start_time = time.time()


    def spawn_insects(self):
        t = time.time()
        if t > self.insects_spawn_timer:
            self.insects_spawn_timer = t + MOSQUITOS_SPAWN_TIME

            # increase the probability that the insect will be a bee over time
            nb = (GAME_DURATION-self.time_left)/GAME_DURATION * 100  / 2  # increase from 0 to 50 during all  the game (linear)
            if random.randint(0, 100) < nb:
                self.insects.append(Bee())
            else:
                self.insects.append(Mosquito())

            # spawn a other mosquito after the half of the game
            if self.time_left < GAME_DURATION/2:
                self.insects.append(Mosquito())

    def load_camera(self):
        _, self.frame = self.cap.read()


    def set_hand_position(self):
        self.frame = self.hand_tracking.scan_hands(self.frame)
        (x, y) = self.hand_tracking.get_hand_center()
        self.hand.rect.center = (x, y)

    def draw(self):
        # draw the background
        self.background.draw(self.surface)
        # draw the insects
        for insect in self.insects:
            insect.draw(self.surface)
        # draw the hand
        self.hand.draw(self.surface)
        # draw the score
        ui.draw_text(self.surface, f"Score : {self.score}", (5, 5), COLORS["score"], font=FONTS["medium"],
                    shadow=True, shadow_color=(255,255,255))
        # draw the time left
        timer_text_color = (160, 40, 0) if self.time_left < 5 else COLORS["timer"] # change the text color if less than 5 s left
        ui.draw_text(self.surface, f"Time left : {self.time_left}", (SCREEN_WIDTH//2, 5),  timer_text_color, font=FONTS["medium"],
                    shadow=True, shadow_color=(255,255,255))


    def game_time_update(self):
        self.time_left = max(round(GAME_DURATION - (time.time() - self.game_start_time), 1), 0)



    def update(self):

        self.load_camera()
        self.set_hand_position()
        self.game_time_update()

        self.draw()

        if self.time_left > 0:
            self.spawn_insects()
            (x, y) = self.hand_tracking.get_hand_center()
            self.hand.rect.center = (x, y)
            self.hand.left_click = self.hand_tracking.hand_closed
            print("Hand closed", self.hand.left_click)
            if self.hand.left_click:
                self.hand.image = self.hand.image_smaller.copy()
            else:
                self.hand.image = self.hand.orig_image.copy()
            self.score = self.hand.kill_insects(self.insects, self.score, self.sounds)
            for insect in self.insects:
                insect.move()

        else: # when the game is over
            if ui.button(self.surface, 540, "Continue", click_sound=self.sounds["slap"]):
                return "menu"


        cv2.imshow("Frame", self.frame)
        cv2.waitKey(1)

定義與手勢(shì)動(dòng)作相關(guān)的動(dòng)作類(lèi):

import pygame
import image
from settings import *
from hand_tracking import HandTracking
import cv2

class Hand:
    def __init__(self):
        self.orig_image = image.load("Assets/hand.png", size=(HAND_SIZE, HAND_SIZE))
        self.image = self.orig_image.copy()
        self.image_smaller = image.load("Assets/hand.png", size=(HAND_SIZE - 50, HAND_SIZE - 50))
        self.rect = pygame.Rect(SCREEN_WIDTH//2, SCREEN_HEIGHT//2, HAND_HITBOX_SIZE[0], HAND_HITBOX_SIZE[1])
        self.left_click = False
        #self.hand_tracking = HandTracking()


    def follow_mouse(self): # change the hand pos center at the mouse pos
        self.rect.center = pygame.mouse.get_pos()
        #self.hand_tracking.display_hand()

    def follow_mediapipe_hand(self, x, y):
        self.rect.center = (x, y)

    def draw_hitbox(self, surface):
        pygame.draw.rect(surface, (200, 60, 0), self.rect)


    def draw(self, surface):
        image.draw(surface, self.image, self.rect.center, pos_mode="center")

        if DRAW_HITBOX:
            self.draw_hitbox(surface)


    def on_insect(self, insects): # return a list with all insects that collide with the hand hitbox
        return [insect for insect in insects if self.rect.colliderect(insect.rect)]


    def kill_insects(self, insects, score, sounds): # will kill the insects that collide with the hand when the left mouse button is pressed
        if self.left_click: # if left click
            for insect in self.on_insect(insects):
                insect_score = insect.kill(insects)
                score += insect_score
                sounds["slap"].play()
                if insect_score < 0:
                    sounds["screaming"].play()
        else:
            self.left_click = False
        return score

定義與蚊子移動(dòng)有關(guān)的類(lèi):

首先從圖片中導(dǎo)入了蚊子的形狀信息，并讓蚊子隨機(jī)的進(jìn)行上下左右移動(dòng)

import pygame
import random
import time
import image
from settings import *

class Mosquito:
    def __init__(self):
        #size
        random_size_value = random.uniform(MOSQUITO_SIZE_RANDOMIZE[0], MOSQUITO_SIZE_RANDOMIZE[1])
        size = (int(MOSQUITOS_SIZES[0] * random_size_value), int(MOSQUITOS_SIZES[1] * random_size_value))
        # moving
        moving_direction, start_pos = self.define_spawn_pos(size)
        # sprite
        self.rect = pygame.Rect(start_pos[0], start_pos[1], size[0]//1.4, size[1]//1.4)
        self.images = [image.load("Assets/mosquito/mosquito.png", size=size, flip=moving_direction=="right")]
        self.current_frame = 0
        self.animation_timer = 0


    def define_spawn_pos(self, size): # define the start pos and moving vel of the mosquito
        vel = random.uniform(MOSQUITOS_MOVE_SPEED["min"], MOSQUITOS_MOVE_SPEED["max"])
        moving_direction = random.choice(("left", "right", "up", "down"))
        if moving_direction == "right":
            start_pos = (-size[0], random.randint(size[1], SCREEN_HEIGHT-size[1]))
            self.vel = [vel, 0]
        if moving_direction == "left":
            start_pos = (SCREEN_WIDTH + size[0], random.randint(size[1], SCREEN_HEIGHT-size[1]))
            self.vel = [-vel, 0]
        if moving_direction == "up":
            start_pos = (random.randint(size[0], SCREEN_WIDTH-size[0]), SCREEN_HEIGHT+size[1])
            self.vel = [0, -vel]
        if moving_direction == "down":
            start_pos = (random.randint(size[0], SCREEN_WIDTH-size[0]), -size[1])
            self.vel = [0, vel]
        return moving_direction, start_pos


    def move(self):
        self.rect.move_ip(self.vel)


    def animate(self): # change the frame of the insect when needed
        t = time.time()
        if t > self.animation_timer:
            self.animation_timer = t + ANIMATION_SPEED
            self.current_frame += 1
            if self.current_frame > len(self.images)-1:
                self.current_frame = 0


    def draw_hitbox(self, surface):
        pygame.draw.rect(surface, (200, 60, 0), self.rect)



    def draw(self, surface):
        self.animate()
        image.draw(surface, self.images[self.current_frame], self.rect.center, pos_mode="center")
        if DRAW_HITBOX:
            self.draw_hitbox(surface)


    def kill(self, mosquitos): # remove the mosquito from the list
        mosquitos.remove(self)
        return 1

另外，手勢(shì)識(shí)別相關(guān)的基礎(chǔ)內(nèi)容，可以參考評(píng)論區(qū)的這個(gè)博客

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