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测试测试
飒飒飒说
测试测试
飒飒说啊
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单词撒上
飒飒飒说
意思
啊飒飒说
梵音
啊飒飒说
大萨苏胡
飒飒飒说
Vocabulary: Prolific
Prolific
Someone or something that prolific is fruitful or highly productive.
A prolific songwriter can churn out five hit tunes before breakfast.
.adj
intellectually productive
egg: a prolific writer.
.adj
bearing in abundance especially offspring
egg: flying foxes are extremely prolific.
egg: a prolific pear tree
https://www.dictionary.com/browse/fruitful%20
https://www.vocabulary.com/dictionary/prolific
DCT离散余弦变换和JPEG 压缩算法
DCT离散余弦变换和JPEG 压缩算法
JPEG 压缩算法介绍
历史
压缩算法：有损的离散余弦变换DCT(本次分享重点)，无损的预测压缩
墒编码：huffman编码(本次分享重点)，算术编码
使用DWT小波变换JPEG 2000：低码率，有损压缩和无损压缩，渐进传输，感兴趣区域
从傅立叶变换到离散余弦变换【简单讲，细节可以单独拆分】
JPEG 压缩算法原理
颜色模式：从RGB到YUV
采样
分块
DCT离散余弦变换
Zigzag排序
量化
整体哈夫曼编码
存储格式
频域分析其他应用
c语言float和bytes array转换
重点：大小端不要搞错
x86是小端，0x123456,对应4个字节，0x12,0x34,0x56,0x78. 在内存中的存储顺序是 0x78, 0x56, 0x34, 0x12
#include <stdio.h>
int main(){
unsigned char buffer[] = {0x46, 0x87, 0x92, 0x64};
float a = 17353.195f;
float b = 0;
printf("zzzzz ....\n");
unsigned int* pa = (unsigned int*)(&a);
unsigned int x = *pa;
int x1 = (x >> 24) & 0xFF;
int x2 = (x >> 16) & 0xFF;
int x3 = (x >> 8) & 0xFF;
int x4 = x & 0xFF;
printf("%x",x1 );
printf("%x", x2);
printf("%x", x3);
printf("%x", x4);
printf("\n");
un...
地图找出口算法python实现
算法描述
代码实现
import copy
m = [
[0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, ],
[1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, ],
[0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, ],
[0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, ],
[0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, ],
[0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, ],
[0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, ],
[0, 0, 0, 0, 0, 0, 0, 0, ...
使用Vault管理服务器各种密码
vault简介
安装
在centos上安装
$ sudo yum install -y yum-utils
$ sudo yum-config-manager --add-repo https://rpm.releases.hashicorp.com/RHEL/hashicorp.repo
$ sudo yum -y install vault
在ubuntu上安装
$ sudo apt update && sudo apt install gpg
$ wget -O- https://apt.releases.hashicorp.com/gpg | gpg --dearmor | sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg >/dev/null
$ gpg --no-default-keyring --keyring /usr/share/keyrings/hashicorp-archive-keyring.gpg --fingerprint
$ echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_relea...
windows环境pip无法安装dlib库的终极解决
问题
机器学习需要安装dlib库，网上搜索
解决方案在最底部
网上搜索的解决方案
pip install cmake
pip install boost
pip install dlib
然而，在安装dlib的时候，错误原因不仅限于没有安装cmake。
报错如下
Collecting dlib
Using cached dlib-19.24.0.tar.gz (3.2 MB)
Preparing metadata (setup.py) ... done
Building wheels for collected packages: dlib
Building wheel for dlib (setup.py) ... error
error: subprocess-exited-with-error
× python setup.py bdist_wheel did not run successfully.
│ exit code: 1
╰─> [320 lines of output]
running bdist_wheel
running build
running build_py
package init file 'tools\python\dlib\__init__.py' no...
Windows WLS2使用本机ss代理访问github
关键问题
WSL每次启动ip不一样，所以不能用静态方法设置http代理。
WSL会把宿主ip地址写入
获得当前宿主ip地址的方法
cat /etc/resolv.conf | grep nameserver | awk '{ print $2 }'
手动设置代理的方法
$ cat /etc/resolv.conf | grep nameserver | awk '{ print $2 }'
172.29.176.1
$ export https_proxy="http://172.29.190.80:10000"
# 下载github库
$ wget https://github.com/microsoft/Bringing-Old-Photos-Back-to-Life/releases/download/v1.0/face_checkpoints.zip
--2022-06-05 01:46:58-- https://github.com/microsoft/Bringing-Old-Photos-Back-to-Life/releases/download/v1.0/face_checkpoints.zip
正在连接 172.29.176.1:10000... 已连接。
已发出 Proxy 请求，正在等待回应... 302 Found
位置：https://obj...
写个dockerfile自动部署hugo
创建dockerfile
FROM golang:1.17-alpine
# Optionally set HUGO_BUILD_TAGS to "extended" or "nodeploy" when building like so:
# docker build --build-arg HUGO_BUILD_TAGS=extended .
ARG HUGO_BUILD_TAGS
ARG CGO=1
ENV CGO_ENABLED=${CGO}
ENV GOOS=linux
ENV GO111MODULE=on
ENV HUGO_VERSION=0.93.3
ENV HUGO_USER=hugo
ENV BASE_DIRECORY=/home/hugo
ENV SITE_NAME=hugosite
ENV HUGO_SITE_DIRECORY=${BASE_DIRECORY}/${SITE_NAME}
ENV HUGO_URL=https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_Linux-64bit.tar.gz
#hugo_extended_0.93.3_Linux-64bit.tar.gz
ENV GLIBC_...