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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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Building a minimal plugin architecture in Python
I have an application, written in Python, which is used by a fairly technical audience (scientists).
18 Answers
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SQL Server - copy stored procedures from one db to another
...Kaye What if he has 30-40 stored procedures? Wouldn't right clicking be a bit slow?
– rvphx
May 22 '12 at 13:59
@Oak O...
How do I clear only a few specific objects from the workspace?
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You'll find the answer by typing ?rm
rm(data_1, data_2, data_3)
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WKWebView not loading local files under iOS 8
For previous iOS 8 betas, load a local web app (in Bundle) and it works fine for both UIWebView and WKWebView , and I even ported a web game using the new WKWebView API.
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Regex to validate password strength
My password strength criteria is as below :
11 Answers
11
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Specifying an Index (Non-Unique Key) Using JPA
...ng JPA annotations. We need a non-unique key on email because there are literally millions of queries on this field per day, and its a bit slow without the key.
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Paste multiple columns together
...paste together
cols <- c( 'b' , 'c' , 'd' )
# create a new column `x` with the three columns collapsed together
data$x <- apply( data[ , cols ] , 1 , paste , collapse = "-" )
# remove the unnecessary columns
data <- data[ , !( names( data ) %in% cols ) ]
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What should my Objective-C singleton look like? [closed]
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Another option is to use the +(void)initialize method. From the documentation:
The runtime sends initialize to each class in a program exactly one time just before the class, or any class that inherits from it, is sent its first message from within the progr...
How do I use installed packages in PyCharm?
...+ button in the Paths area. You can put the path to the module you'd like it to recognize.
But I don't know the path..
Open the python interpreter where you can import the module.
>> import gnuradio
>> gnuradio.__file__
"path/to/gnuradio"
Most commonly you'll have a folder structu...