pychar使用pygame编写停车管理系统，包含车牌识别，停车位管理，停车费收取，代码

以下是一个简单的停车管理系统的代码示例，其中包括车牌识别、停车位管理和停车费收取功能。请注意，这只是一个示例代码，您需要根据您的具体需求进行修改和扩展。

import pygame
import cv2
import pytesseract
import sqlite3
import datetime

# 初始化pygame
pygame.init()

# 设置窗口大小和标题
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("停车管理系统")

# 设置字体
font = pygame.font.SysFont("Arial", 24)

# 车牌识别
def recognize_license_plate(image):
    # 车牌检测
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    cascade = cv2.CascadeClassifier("haarcascade_russian_plate_number.xml")
    plates = cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5)

    # 车牌识别
    pytesseract.pytesseract.tesseract_cmd = r"C:\Program Files\Tesseract-OCR\tesseract.exe"
    for (x, y, w, h) in plates:
        plate_image = image[y:y + h, x:x + w]
        plate_text = pytesseract.image_to_string(plate_image, lang="eng", config="--psm 7")
        return plate_text.strip()

# 连接数据库
conn = sqlite3.connect("parking.db")
c = conn.cursor()

# 初始化停车位
c.execute("CREATE TABLE IF NOT EXISTS parking_spots (id INTEGER PRIMARY KEY, is_empty BOOLEAN)")
c.execute("INSERT INTO parking_spots (id, is_empty) VALUES (1, TRUE)")
c.execute("INSERT INTO parking_spots (id, is_empty) VALUES (2, TRUE)")
c.execute("INSERT INTO parking_spots (id, is_empty) VALUES (3, TRUE)")
conn.commit()

# 停车费率
parking_rate = 0.5  # 每分钟0.5元

# 停车记录
parking_records = []

# 游戏循环
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 捕获摄像头图像
    cap = cv2.VideoCapture(0)
    ret, frame = cap.read()

    # 车牌识别
    plate_text = recognize_license_plate(frame)

    # 显示车牌号码
    plate_text_surface = font.render("车牌号码：" + plate_text, True, (255, 255, 255))
    screen.blit(plate_text_surface, (50, 50))

    # 查找空闲停车位
    c.execute("SELECT id FROM parking_spots WHERE is_empty = TRUE LIMIT 1")
    spot = c.fetchone()

    # 停车位管理
    if spot is not None:
        # 更新停车位状态
        c.execute("UPDATE parking_spots SET is_empty = FALSE WHERE id = ?", (spot[0],))
        conn.commit()

        # 添加停车记录
        parking_records.append({"spot_id": spot[0], "plate_text": plate_text, "start_time": datetime.datetime.now()})

        # 显示停车位信息
        spot_text_surface = font.render("停车位：" + str(spot[0]), True, (255, 255, 255))
        screen.blit(spot_text_surface, (50, 100))

    # 计算停车费用
    for record in parking_records:
        if record["plate_text"] == plate_text:
            elapsed_time = datetime.datetime.now() - record["start_time"]
            parking_fee = round(elapsed_time.total_seconds() / 60 * parking_rate, 2)
            fee_text_surface = font.render("停车费用：" + str(parking_fee) + "元", True, (255, 255, 255))
            screen.blit(fee_text_surface, (50, 150))

    # 显示摄像头图像
    frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
    frame = pygame.surfarray.make_surface(frame.swapaxes(0, 1))
    screen.blit(frame, (0, 0))

    # 更新屏幕
    pygame.display.update()

# 释放摄像头资源
cap.release()

# 关闭数据库连接
conn.close()

# 退出pygame
pygame.quit()

注意：这段代码仅供参考，可能需要根据您的具体需求进行修改和扩展。同时，这段代码也有一些不足之处，例如没有处理异常情况、没有进行图像预处理等。