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Is there a way to detect if an image is blurry?
...plot:
The spread for the un-blurred images is a little better here (2.5 vs 3.3), mainly because this method only uses the strongest contrast in the image, while the FFT is essentially a mean over the whole image. The functions are also decreasing faster, so it might be easier to set a "blurry" th...
Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference
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community wiki
9 revs, 7 users 84%Fabrício Matté
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Why do we need RESTful Web Services?
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community wiki
2 revs, 2 users 51%Rajarajan Pudupatti Sundari J
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How to encrypt String in Java
... all over StackOverflow and online in tutorials and examples.
Nonces and IVs
In response to the issue found with ECB mode nounces also known as IVs were created. The idea is that we generate a new random variable and attach it to every encryption so that when you encrypt two messages that are the ...
How can I reliably determine the type of a variable that is declared using var at design time?
...ariable in more or less the same way as the compiler will. If you use the VS Intellisense, you may notice that it won't give you the type of var until you've finished entering a valid (resolvable) assignment expression. If the expression is still ambiguous (for instance, it can't fully infer the g...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
... the example given by the original poster shows.
A brief primer on Kernel vs. User mode
On Unix, or any protected-memory operating system, 'Kernel' or 'Supervisor' mode refers to a privileged mode that the CPU can operate in. Certain privileged actions that could affect security or stability can ...
What to do Regular expression pattern doesn't match anywhere in string?
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@tchrist, this never answers OPs original question. And is parsing the proper term here? Afaics the regex are doing tokenizing/lexical anal...
Seeking clarification on apparent contradictions regarding weakly typed languages
... is as weakly typed as it gets. Everything else is just a matter of static vs. dynamic type checking, i.e. of the time when a type is checked.
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An example of how to use getopts in bash
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getopt vs getopts .. very different cross platform compliance
– shadowbq
Jan 29 at 14:29
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Peak signal detection in realtime timeseries data
...) - y(t+dt) > m)
where dt and m are parameters to control sensitivity vs time-delay
This is what you get with the mentioned algorithm:
here is the code to reproduce the plot in python:
import numpy as np
import matplotlib.pyplot as plt
input = np.array([ 1. , 1. , 1. , 1. , 1. , 1. , ...