1 HSV上下限
颜色的HSV上下限如下表:
2 追踪单个颜色
- import cv2 as cv
- import numpy as np
- cap = cv.VideoCapture(0)
- lower_color = np.array([0, 43, 46])
- upper_color = np.array([10, 255, 255])
- while cap.isOpened():
- # 读取帧
- _, frame = cap.read()
- # 转换颜色空间 BGR 到 HSV
- hsv = cv.cvtColor(frame, cv.COLOR_BGR2HSV)
- # 设置HSV的阈值使得只取某色
- mask = cv.inRange(hsv, lower_color, upper_color)
- # 将掩膜和图像逐像素相加
- res = cv.bitwise_and(frame, frame, mask=mask)
- # cv.imshow('frame', frame)
- cv.imshow('mask', mask)
- cv.imshow('res', res)
- if cv.waitKey(1) == ord("q"):
- break
- cv.destroyAllWindows()
结果如下:
2 追踪多个颜色
- import cv2 as cv
- import numpy as np
- cap = cv.VideoCapture(0)
- lower_red = np.array([0, 43, 46])
- upper_red = np.array([10, 255, 255])
- lower_blue = np.array([100, 43, 46])
- upper_blue = np.array([124, 255, 255])
- while cap.isOpened():
- _, frame = cap.read()
- hsv = cv.cvtColor(frame, cv.COLOR_BGR2HSV)
- mask1 = cv.inRange(hsv, lower_red, upper_red)
- mask2 = cv.inRange(hsv, lower_blue, upper_blue)
- mask = mask1 + mask2
- res = cv.bitwise_and(frame, frame, mask=mask)
- # cv.imshow('frame', frame)
- cv.imshow('mask', mask)
- cv.imshow('res', res)
- if cv.waitKey(1) == ord("q"):
- break
- cv.destroyAllWindows()
参考文献:
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原文链接:https://blog.csdn.net/weixin_44575152/article/details/114799122