opencv(6)颜色空间

HSV值

import cv2 as cv
import numpy as np
# 打开摄像头
cap = cv.VideoCapture(0)
while (1):
    # 读取桢
    _, frame = cap.read()
    # 转换颜色空间 hsv
    hsv = cv.cvtColor(frame, cv.COLOR_BGR2HSV)
    # 设置识别颜色的上限和下线 参照图表设置白色
    lower = np.array([0, 0, 221])
    uper = np.array([180, 30, 255])
    # 设置cv的范围
    mask = cv.inRange(hsv, lower, uper)
    res = cv.bitwise_and(frame, frame, mask=mask)
    cv.imshow("test", frame)
    cv.imshow("mask", mask)
    cv.imshow("res", res)
    k = cv.waitKey(5) & 0xFF
    if k == 27:
        break
cv.destroyAllWindows()