import cv2 import numpy as np cap = cv2.VideoCapture(0) # set blue thresh 设置HSV中蓝色.天蓝色范围 lower_blue = np.array([78,43,46]) upper_blue = np.array([110,255,255]) while(1): # get a frame and show 获取视频帧并转成HSV格式, 利用cvtColor()将BGR格式转成HSV格式,参数为cv2.COLOR_BGR…
原文链接:https://blog.csdn.net/cike14/article/details/50649811 import cv2 import numpy as np camera=cv2.VideoCapture(0) firstframe=None while True: ret,frame = camera.read() if not ret: break gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY) gray=cv2.GaussianB…
正文共:30429 字 预计阅读时间:76分钟 原文链接:https://realpython.com/python-type-checking/ 作者:Geir Arne Hjelle 译者:陈祥安 在本指南中,你将了解Python类型检查.传统上,Python解释器以灵活但隐式的方式处理类型.Python的最新版本允许你指定可由不同工具使用的显式类型提示,以帮助您更有效地开发代码. 通过本教程,你将学到以下内容: 类型注解和提示(Type annotations and type hints…
python 运行后出现core dump产生core.**文件,可通过gdb来调试 Using GDB with a core dump having found build/python/core., we can now launch GDB: gdb programname coredump i.e. gdb /usr/bin/python2 build/python/core. A lot of information might scroll by. At the end, you'…