Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with filters
Search options not deleted
user 16781
In signal processing, a filter is a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
4
votes
3
answers
556
views
Efficient algorithm to impose boundary conditions while applying a 2d filter
It is possible to filter an image by using a 2d DFT. This will result in periodic boundary conditions. Now, is it possible to use the DFT to filter an image, while maintaining predefined boundary cond …
- 205
2
votes
How to apply a Butterworth filter to data of varying sample rate?
I can figure out two options:
Interpolate data
Remember that filters are dynamical systems and solve the corresponding ordinary differential equation (ODE)
In the second method, you basically use the …
- 205
0
votes
0
answers
65
views
2d fourier based filter on odd image sizes
I am trying to use
$$
f(x, y) (-1)^{x + y} \Leftrightarrow F(u - M/2, v - N/2)
$$
to post-process the result of a Fourier-based filter operation, like so
engine.run<Dft::Direction::Backward>(size, inp …
- 205