<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[windinroad的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/windinroad</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; windinroad]]></copyright><item><title><![CDATA[python基于opencv实现分析每帧视频，从视频画面中提取出乒乓球的遮罩，然后再提取出乒乓球。]]></title><link>https://blog.youkuaiyun.com/windinroad/article/details/124485286</link><guid>https://blog.youkuaiyun.com/windinroad/article/details/124485286</guid><author>windinroad</author><pubDate>Wed, 04 May 2022 10:00:00 +0800</pubDate><description><![CDATA[首先要利用VideoCapture读入视频信息。采用颜色追踪的方法来确定小球位置，查找遮罩图的轮廓，确定该轮廓的包围框，将包围框的中心作为乒乓球的位置，更新乒乓球位置

具体代码：


import cv2
import numpy as np



def empty(a):
    pass


def draw_direction(img, lx, ly, nx, ny):
    dx = nx - lx
    dy = ny - ly
    if abs(dx) &lt; 4 and abs(]]></description><category></category></item><item><title><![CDATA[idea连接hive]]></title><link>https://blog.youkuaiyun.com/windinroad/article/details/123922043</link><guid>https://blog.youkuaiyun.com/windinroad/article/details/123922043</guid><author>windinroad</author><pubDate>Sat, 02 Apr 2022 16:20:33 +0800</pubDate><description><![CDATA[idea连接hive]]></description><category></category></item><item><title><![CDATA[Ubuntu20.04.3安装hive时出现数据库连接不上的问题]]></title><link>https://blog.youkuaiyun.com/windinroad/article/details/123311174</link><guid>https://blog.youkuaiyun.com/windinroad/article/details/123311174</guid><author>windinroad</author><pubDate>Sun, 06 Mar 2022 16:15:07 +0800</pubDate><description><![CDATA[最近开始学习hive，在安装的时候遇到一些问题，发出来供大家参考一下。

在安装过程中保证Hadoop集群的搭建和集群已开启。

此处说明hive结合MySQL搭建。

首先安装mysql。Ubuntu20.04.3安装的mysql是MySQL8.0。

sudo apt-get update

sudo apt-get install mysql-server

安装完之后进行初始化，这样好修改密码，待会配置xml文件会用到。

sudo mysql_secure_installation

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