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How to crop an image in OpenCV using Python
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It's very simple. Use numpy slicing.
import cv2
img = cv2.imread("lenna.png")
crop_img = img[y:y+h, x:x+w]
cv2.imshow("cropped", crop_img)
cv2.waitKey(0)
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Create a git patch from the uncommitted changes in the current working directory
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edited Sep 5 at 19:30
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90后创业四年:曾经觉得不公 后来愿赌服输 - 资讯 - 清泛网 - 专注C/C++及内核技术
...陌生人一旦成了熟人，他们的第一句话是我们加微信或加QQ，然后这个用户就流失了。中国最大的陌生人社交应用陌陌做本地化的群组，也是为了形成一个闭环。2014年我们做陌生人私密轻社交应用“萌萌搭”，做了两个月发现不...
How does this giant regex work?
... is a backdoor, and you must remove it immediately. Your system maybe compromised further.
This is what the backdoor looks like when it is accessed:
the hex part of the code:
\x65\x76\x61\x6C\x28\x67\x7A\x69\x6E\x66\x6C\x61\x74\x65\x28\x62\x61\x73\x65\x36\x34\x5F\x64\x65\x63\x6F\x64\x65\x28...
Remove a fixed prefix/suffix from a string in Bash
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Thanks for the Notes! qq: in your code example you also have a forward slash / right after the string, what is that for?
– DiegoSalazar
May 15 '19 at 15:29
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How to split a file into equal parts, without breaking individual lines? [duplicate]
...wing script for an example:
#!/usr/bin/bash
# Configuration stuff
fspec=qq.c
num_files=6
# Work out lines per file.
total_lines=$(wc -l <${fspec})
((lines_per_file = (total_lines + num_files - 1) / num_files))
# Split the actual file, maintaining lines.
split --lines=${lines_per_file} ${fs...
How to see top processes sorted by actual memory usage?
...e metadata and files that were requested, until something that looks more important pushes that data out. It's why you can run:
find /home -type f -name '*.mp3'
find /home -type f -name '*.aac'
and have the second find instance run at ridiculous speed.
Linux only leaves a little bit of memory 'f...
Having Django serve downloadable files
...ing with your view takes a few lines of code:
from django.utils.encoding import smart_str
response = HttpResponse(mimetype='application/force-download') # mimetype is replaced by content_type for django 1.7
response['Content-Disposition'] = 'attachment; filename=%s' % smart_str(file_name)
response...
How to change MySQL data directory?
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edited Jan 18 '17 at 8:58
Richard
7,72111...
What's the best way to do a backwards loop in C/C#/C++?
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edited Nov 10 '08 at 4:17
MusiGenesis
70....