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Signal Processing

Beta Q&A site for practitioners of the art and science of signal, image and video processing.

Announcements

6  
Signal, Image & Video Processing now has 100% in total committers and for committers with 200+ rep. Please re-comit to up the third commitment score. – Peter K. Aug 2 '11 at 0:06
3  
We made it! = ) – Phonon Aug 12 '11 at 21:10

-7
votes
2
answers

Theory-edge “frontiers of algorithmics” group to merge other proposals & struggling beta sites?

jan 31 at 17:45 vzn 147
4
votes
4
answers

Is this proposal intended to be just for digital or is it for analog as well?

aug 9 at 11:03 MSalters 151
4
votes
2
answers

Why the name signal, image and video processing?

aug 7 at 21:26 Matthew Read 573
15
votes
7
answers

We have 35% ==> How do we get to 100% and private beta?

jul 2 at 9:50 jonsca 820
23
votes
4
answers

Shall we merge Computer Vision and Signal, Image & Video Processing?

jun 25 at 16:50 Peter K. 2,937

create new discussion

This proposal is now in the Beta phase — example questions are locked!

59 Example Questions (11 closed)

active oldest votes
up vote 2 down vote
What's the best way to rotate 1 bit per pixel scanned documents without introducing horizontal "shear line" artifacts?
added by T Powers Nov 13 '10 at 10:53
link
up vote 1 down vote
What does a low-pass filter do?
added by Nik Reiman Jun 2 '10 at 8:10
link
3  
Far too entry-level, imo – Nik Reiman Jun 3 '10 at 11:49
up vote 1 down vote
What is the difference between discrimination and demodulation?
added by Ben Gartner Jun 16 '10 at 23:26
link
up vote 1 down vote
What equipment for electronics should I have on hand? [closed]
added by msutherl Jul 11 '10 at 5:41
link

closed as off topic by Marty, Studer, DarenW, Jim A, Mark Borgerding Aug 30 '10 at 17:17

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

electronics.stackexchange.com/questions/869/… – endolith Oct 18 '10 at 19:11
up vote 1 down vote
Where can I find a circuit diagram for a graphic equalizer?
added by BCS Sep 9 '10 at 0:37
link
This belongs on electronics.stackexchange.com – endolith Oct 18 '10 at 19:01
@endolith: While I agree that electronics.* is an excellent place for this question the only way I see it could be off topic here is if analog implementation of signal processing are off topic. If so, the description needs to be adjusted accordingly. – BCS Oct 19 '10 at 1:10
There's going to be some overlap between electronics.*, dsp.*, and stackoverflow. We need to clarify which things belong on which sites. – endolith Oct 27 '10 at 14:57
up vote 1 down vote
Is there an FFT that uses a logarithmic division of frequency?
added by endolith Oct 18 '10 at 18:56
link
stackoverflow.com/questions/1120422/… – endolith Oct 18 '10 at 18:56
up vote 1 down vote
Is there an FFT-based 2D convolution and correlation in Python?
added by endolith Oct 18 '10 at 18:58
link
stackoverflow.com/questions/1100100/… – endolith Oct 18 '10 at 18:58
up vote 0 down vote
What digital signal processor should I use for this application? [closed]
added by Peter K. Jun 2 '10 at 1:07
link

closed as off topic by Lance Roberts, Adam Davis, eryksun, Nik Reiman, Danny Jul 9 '10 at 17:32

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

If you're doing signal processing, you're in 3 camps: theory, practice, and design; software implementation; and processing hardware (e.g. FPGAs, DSPs, microcontrollers). Forcing a divide provides some semblance of organization to make it easier to find interesting questions to answer. The more tags you have (e.g. because the topic definition is too general), the more questions you'll have that are improperly or vaguely tagged. – eryksun Jun 23 '10 at 20:28
up vote 0 down vote
Does anyone have example C code that gets the xyz module in a TI TMS1234 to initialize successfully? [closed]
added by Peter K. Jun 2 '10 at 1:07
link

closed as off topic by Adam Davis, eryksun, Nik Reiman, msutherl, morfu Aug 22 '10 at 11:40

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

1  
Apparently code is OK on this site. Every other proposal is being very strict about confining such questions to StackOverflow. – Robert Harvey Jun 3 '10 at 3:19
I think Signal Processing could be different. A lot of Signal Processing people write code to test an algorithm out, and do not really care about the art of programming. – earlNameless Jun 18 '10 at 15:20
Signal processing is information theory, communication & control systems, random processes, etc. If I have a problem coding a discrete-time system, I'll take it to StackOverflow. – eryksun Jun 23 '10 at 20:08
up vote 0 down vote
What are differences between digital and tube amplifiers? [closed]
added by Lance Roberts Jun 2 '10 at 5:33
link

closed as off topic by Nik Reiman, Adam Davis, Willbill, Drazick, eryksun Jun 23 '10 at 20:45

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

electronics.stackexchange.com – endolith Oct 18 '10 at 19:02
up vote 0 down vote
What EQ VST plugin is better, Waves Renaissance EQ or Sonalksis SV-517? [closed]
added by msutherl Jul 11 '10 at 5:37
link

closed as off topic by Marty, igor b., Peter K., moala, Mild Fuzz Nov 1 '10 at 18:31

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

off-topic: would be on topic but too subjective in area51.stackexchange.com/proposals/20203/… – moala Oct 18 '10 at 15:23
up vote 0 down vote
Does the extended Kalman filter offer significant improvement over regular Kalman filter in processing of IMU data?
added by Figaro Aug 12 '10 at 13:15
link
(IMU = Inertial Measurement Unit. en.wikipedia.org/wiki/Inertial_measurement_unit) – WikiSpeedia hang-around Aug 22 '10 at 13:51
up vote 0 down vote
What is the fastest way to convert from complex to mag on x86?
added by Mark Borgerding Aug 30 '10 at 17:14
link
up vote 0 down vote
What is OFDM?
added by Mark Borgerding Aug 30 '10 at 17:15
link
I think this exemplary question is too basic. Googling "site:en.wikipedia.org OFDM" the top hit is the answer, en.wikipedia.org/wiki/… – WikiSpeedia hang-around Sep 28 '10 at 13:41
up vote 0 down vote
If convolution in the time domain = multiplication in the frequency domain, what is the frequency domain representation of correlation?
added by Jacob Sep 23 '10 at 19:40
link
up vote 0 down vote
Which time-frequency coefficients does the wavelet transform compute?
added by endolith, edited by WikiSpeedia hang-around Nov 19 '10 at 20:42
link
stackoverflow.com/questions/1787536/… – endolith Oct 18 '10 at 18:55
up vote 0 down vote
How do I deskew/straighten a scanned document?
added by T Powers Nov 13 '10 at 10:40
link
up vote 0 down vote
How do I automatically segment picture regions from text regions in scanned documents?
added by T Powers Nov 13 '10 at 10:42
link
up vote 0 down vote
How can I determine the "background" of a scanned document and change it to be pure white?
added by T Powers Nov 13 '10 at 10:44
link
up vote 0 down vote
I need an example of a Wiener filter for my homework. Can anyone out there give me some example code?
added by Pearsonartphoto Dec 16 '10 at 13:59
link
up vote 0 down vote
Does anyone know of DSP processes that are based on high-order derivatives? (like 4th order or higher)
added by Garan Dec 21 '10 at 4:38
link
up vote 0 down vote
Which mp4 codec should I use to compress my home movies? ;)
added by Garan Dec 21 '10 at 7:13
link
up vote -1 down vote
Has anybody seen Microsoft Mathematics Add-In for Word? [closed]
added by Mark Borgerding Aug 30 '10 at 17:10
link

closed as off topic by Mild Fuzz, T Powers, Stéphane Péchard, Jason, Garan Dec 21 '10 at 4:17

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

This message is just random, it doesn't really help show what this form is and isn't, just that it's not a place for random software that might not be related to DSP – Pearsonartphoto Dec 16 '10 at 13:57
up vote -1 down vote
What is the Nyquist rate? How is it defined for real and complex sampling?
added by runexe Sep 27 '10 at 14:47
link
1  
First question is a bit too basic (I think any definition-kind of question that you can look up from Wikipedia does not belong in Stack Exchange family, in general), the second one is very good. – Geoffrey Zheng Sep 28 '10 at 13:26
up vote -2 down vote
Can you explain what wavelets are?
added by matias.valdenegro, edited by WikiSpeedia hang-around Jul 13 '10 at 22:55
link
Too broad. More appropriate for a wiki – Mark Borgerding Aug 30 '10 at 17:17
It's broad, but it's not off topic. – Mild Fuzz Nov 1 '10 at 18:31
up vote -3 down vote
What kind of stereo equipment should I buy? [closed]
added by Peter K. Jun 2 '10 at 1:14
link

closed as off topic by Nik Reiman, Lance Roberts, Doresoom, Paul R, Adam Davis Jun 15 '10 at 21:29

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

This just doesn't help to show what this community is at all... – Pearsonartphoto Dec 16 '10 at 14:02
up vote -3 down vote
What is the Fourier Transformation and how it can be used to apply different effects to audio?
added by Michael, edited by WikiSpeedia hang-around Aug 22 '10 at 13:52
link
I think the first part (what is Fourier) would be too basic for this site. The second part (how do you apply it to audio) would be a good question because it focuses on the application of the Fourier Transform in the real world which might not be apparent from the math. – earlNameless Jul 20 '10 at 2:08
up vote -6 down vote
Is C or C++ better? [closed]
added by Mark Borgerding Aug 30 '10 at 17:06
link

closed as off topic by BCS, Geoffrey Zheng, hotpaw2, runexe, igor b. Sep 24 '10 at 23:46

This question does not relate to the topic of the proposal.
It was closed as part of an automated migration of off-topic to close votes on September 29, 2011.

1  
Off topic questions must be related to the site, an must be those questions that we expect been posted by some users. I think this is not a good example. – Edgar Nov 25 '10 at 0:19
This is more related to stackoverflow than signal processing. – Ned Nov 29 '10 at 18:46
up vote -7 down vote
What is the best programming language to use for DSP?
added by Nik Reiman Jun 3 '10 at 7:12
link
Subjective & argumentative – Nik Reiman Jun 3 '10 at 11:49
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Peter K.
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