#!/usr/bin/python3
# coding=utf-8
"""
Python OpenCV Class 002
"""

import cv2
import numpy as np

CAP = cv2.VideoCapture(0)

# 设置蓝色阈值
LOWER_BLUE = np.array([78, 43, 46])
UPPER_BLUE = np.array([110, 255, 255])

while 1:
    # 获取一帧图像并且显示
    RET, FRAME = CAP.read()
    cv2.imshow('Capture', FRAME)
    FRAME = cv2.GaussianBlur(FRAME, (5, 5), 1.5) 
    cv2.imshow('Gaussian', FRAME)

    # 切换到 HSV 模式
    HSV = cv2.cvtColor(FRAME, cv2.COLOR_BGR2HSV)

    # 获取 Mask
    MASK = cv2.inRange(HSV, LOWER_BLUE, UPPER_BLUE)
    cv2.imshow('Mask', MASK)

    # Mask
    RES = cv2.bitwise_and(FRAME, FRAME, mask=MASK)
    cv2.imshow('Result', RES)

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

CAP.release()
cv2.destroyAllWindows()