Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [video]

The tag has no usage guidance.

0
votes
1answer
32 views

Alternate Octave Commands for Matlab

can you tell me how to write video data to file.. what is the alternate of these 4 commands in octave ...
0
votes
1answer
160 views

Want to do shot boundary detection via SVM, what are some good features?

I want to do shot boundary detection via SVM's. I'm dividing the frame into nxn blocks. Per block I'm finding these features: shannons entropy edges (H,V,Diag) standard deviation for consecutive ...
0
votes
0answers
13 views

How to receive v-chip signals from digital TV stream

I'm trying to retrieve and decode V-chip data from my TV streams (NTSC/ATSC digital streams). Apparently these data are embedded somewhere in the stream itself, but I have no clue how they are ...
1
vote
1answer
109 views

RF demodulation for dummies

Given a signal that's been FM encoded on a carrier wave, what are the individual steps I need to take to demodulate it, and recover the original signal? I don't have a background in signal processing,...
0
votes
2answers
38 views

Converting speech audio to telephone audio

I am trying to train a machine learning algorithm on telephony speech audio. However, there isn't really enough data for this anywhere that I can find. My solution is to just use speech audio from ...
2
votes
1answer
755 views

Difference between texture and illumination in image

I am new in image processing. What are texture and illumination in image? How can we define these terms?
-1
votes
1answer
62 views

How can I convert raw pixel data to AVI video?

I have series of gray-scale 8-bit frames and I want to convert them into AVI video. How can I do this? Is there any existing converting utils or products for this type of task? I even do not ...
0
votes
2answers
3k views

Does the cv2.waitKey argument determine the frame-rate while capturing a video?

Kinda new to image processing, so pardon me if the question is too stupid. Using the library cv2 in python to capture video from my webcam, which, so far as I can see as a programmer, is basically ...
0
votes
1answer
34 views

How we can show that 2 correlated videos are similar?

Can I tell that different versions of the same video are correlated to each other? and if so, how can I show this correlation? for example, high-quality and poor-quality versions of the same video. ...
0
votes
0answers
94 views

API/ Library for re-orienting 360 degree camera frame efficiently

I am trying to correct the orientation of a 360 degree camera frame using roll, pitch and yaw estimates coming from my C++ Extended Kalman Filter (EKF) code. I am interested in using libraries and ...
1
vote
2answers
31 views

Does Gamma Correction Interfere with Sub Pixel Motion Estimation?

Advanced Video Coding (AVC) and High Efficiency Video Coding (HEVC) work on gamma corrected, non linear, colors. When interpolating the value at subpixels, a multi tap algorithm processes the gamma ...
57
votes
4answers
16k views

Why is TV static noise always black and white?

Most modern day Cathode Ray Tube (CRT) televisions manufactured after the 1960s (after the introduction of NTSC and PAL standards) supported the circuit-based decoding of colored signals. It is well ...
1
vote
2answers
694 views

How to calculate transfer rate and needed bandwidth

I have two questions: 1- If I want to transfer a photo via bluetooth, how should I find how long it takes to transfer? I mean the formula between the image size, bluetooth bandwidth and time. 2- If ...
1
vote
1answer
66 views

Video processing to detect a logo in frames

I am trying to detect a TV channel logo inside a video file, so simply given an input .mp4 video, detect if it has that logo present in all (or most) of frames or not (or maybe what percentage of ...
0
votes
2answers
90 views

Video compression - why not just sending the changed parts?

I'm trying to understand how video compression through dense optical flow works (I'm a newbie with video compression). I easily understood what optical flow is, the thing I can't understand is why a ...
0
votes
1answer
332 views

How to reduce noise in a video stream?

I've been using Open Broadcaster to stream the infrared HDMI output from a 4K Sony video camera. It works pretty well, but one thing that I'm finding a little annoying for image analysis is the ...
1
vote
0answers
82 views

Shot boundary detection using SVM's

I'm trying to do shot boundary detection using SVM's. I'm differentiating between 3 shots, cut, fade and dissolve + (normal frames). I had used two features, shannon's entropy and variance, it gave ...
1
vote
1answer
3k views

How to remove wind noise from video file

I've some video footage where wind noise is drowning out background noise I want to be clear. Is it possible to do some DSP to remove/attenuate this wind noise in order to hear the engine noise? I ...
0
votes
1answer
117 views

How to extract pixel-specific time-stream from mp4 video

I am interested in extracting specific timechange information from an mp4 1900x1200 20fps video.The only pixels I want to process can be found in its borders. Therefore I only need to process ...
2
votes
1answer
156 views

Is video considered a Tensor?

A sampled single dimensional signal is a vector. A sampled image is a matrix. Is video considered a rank-3 tensor since it is a set of images stacked on top of each other?
0
votes
1answer
8k views

What is Typical RTP Packet size for H.264 video transmission

I am encoding my video using JM reference software. The encoded file is divided into RTP packets. I can set a RTP packet size in bytes using configuration file. But i am unable to find what should be ...
1
vote
0answers
51 views

Is there a way to see video after applying packet loss

I have encoded a video stream using JM using RTP. Then i have applied rtp_loss on it but after that i am unable to decode video. Like in this example a video with different packet loss percentages are ...
-1
votes
1answer
31 views

Tampering detection using data hiding

I am planning to do a project on data hiding using codeword substitution in encrypted video. So as an enhancement I am planning to use this data hiding technique for tampering detection, for which I'...
1
vote
1answer
141 views

How are video thumbnails chosen?

Of the thousands to millions of frames that a video might have, how is a particular representative frame chosen to be the thumbnail?
-2
votes
1answer
81 views

How to convert HDMI to VGA through a computer using software?

I have 1 monitor with VGA input only, 1 computer with only an HDMI output, and 1 computer with a VGA and HDMI socket. I also have a VGA cable and HDMI cable. So my main question is: Could I use some ...
2
votes
0answers
1k views

object tracking in raw h.264 compressed video

I am working on a project that requires me to detect and track a human in a live video from a webcam connected to a Beagleboard xm. I have completed this task using Opencv in pixel domain. The results ...
3
votes
1answer
1k views

Difference Between monocular video and stereo video?

What is the difference between monocular video and stereo video ,as i am studying about motion tracking i need to know the meaning of these two things.
0
votes
1answer
259 views

Difference between ycbcr and ycbycr

I see in a paper mentioning ycbcr as well as ycbycr. I am wondering what is the difference between the two? In the figure, the first two lines show ycbycr but the two bottom lines show ycbycr?
1
vote
1answer
30 views

Find large distinctions in Video

Assume you have 77777 pictures that are mostly noise. They are about magnetic anisotropy. There is one picture among these pictures which has high contrast difference between two large areas (some ...
0
votes
2answers
76 views

Detecting characters in high contrast/oversaturated regions

I'm currently tagging insects with reflective tags and filming them in night-mode on my camera which has an infrared light. I have some markings on the tags which I need to catch on film. ...
0
votes
1answer
646 views

Hashing a video file

Bit of a long post, but this is a complex topic: I want to hash of a series of video files so that they can be quickly checked for duplication. I know that any amount of data can be reduced to a hash,...
2
votes
1answer
863 views

Extract not blurry images from video

I need a tool or code for extract not blurry images from video (it can be used for panorama or SFM building from video) something like http://research.microsoft.com/en-us/um/redmond/groups/ivm/...