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practice *nix command line
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sudo mkdir /media/usb
sudo mount -t vfat /dev/sdb /media/usb
cd ~
sudo umount /dev/sdb
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groups [user]
id [user] // provide addtional information like UID & GID
cat /etc/group
# groupadd [group] // create new group with root privilege
# groupdel [group]
# gpasswd -a [user] [group] // add users to a group
# gpasswd -d [user] [group] //remove users from a group
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库python的没用过,说说图像处理的思路吧
1,拿图(废话)
2.图拿到后,直接灰度化+二值化一次
3.由于基本无噪声且无粘连现象,对于二值图垂直投影一次,得到投影曲线
4.投影曲线找凹点,切为4个区域,
5.每个区域找上下左右边界,切割
6.尺寸归一化
7.识别--办法很多,我刷了几次,只有数字字母,做个模板库,比对吧;复杂的就要分类了,分类就有很多高深方法了,svm,神经网络,特征统计...具体实现跟方法就有关系了
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pacman 更新失败的解决办法, 一般是文件冲突的, 删除, 或者不更新这个包
--ignore package, 暴力点就说-f