首先，你需要在百度智能云官网注册一个账号并创建一个车牌识别应用，获取API Key和Secret Key。然后安装百度AI的Python SDK:

pip install baidu-aip

接下来，编写一个基于摄像头识别车牌号并打印出车牌信息文本的程序：

from aip import AipOcr
import cv2

# 替换为你的API Key和Secret Key
APP_ID = '你的APP_ID'
API_KEY = '你的API_KEY'
SECRET_KEY = '你的SECRET_KEY'

client = AipOcr(APP_ID, API_KEY, SECRET_KEY)

def get_file_content(file_path):
    with open(file_path, 'rb') as fp:
        return fp.read()

def recognize_license_plate(image):
    options = {
        'detect': True,
        'language_type': 'CHN_ENG',
    }
    result = client.licensePlate(get_file_content(image), options)
    return result['words_result'][0]['words'] if result['words_result'] else None

def main():
    cap = cv2.VideoCapture(0)
    while True:
        ret, frame = cap.read()
        if not ret:
            break
        license_plates = recognize_license_plate(frame)
        if license_plates:
            print('车牌号：', ' '.join(license_plates))
        cv2.imshow('License Plate Recognition', frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    cap.release()
    cv2.destroyAllWindows()

if __name__ == '__main__':
    main()

运行这个程序，它将打开摄像头并实时识别车牌号。按“q”键退出程序。