Algorithms for processing video signals i.e. sequence of images either for enhancements, conversions or analysis of objects within it.

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Variable framerate footage in Adobe Premiere Pro

Background information I'm going to create a audio/visual production with two camera's. One camera uses 1920 x 1080 with 25fps rate. The other camera is the GoPro camera. There are several video ...
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Video quality assessment method

Do you know any method for objective video quality assessment except PSNR and SSIM? It should be relatively easy implementable in any langugage, but can be more difficuilt than SSIM. I found VIF, but ...
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26 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?
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What to do with frames when applying a non-linear time-warp to a video?

Say I have two videos $v_a$ and I want a video $v_b$ which is basically video $v_a$ but with a frame delay as follows: We therefore have a non-linear timemap between the two videos. How should a ...
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Unable to reproduce same quality results - Motion (Video) Magnification by MIT

I'm exploring the Eulerian Video Magnification for Revealing Subtle Changes in the World paper and trying to reproduce the same results they obtained, but in my own videos rather than the ones ...
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56 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. ...
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Map time difference between two similar videos

Question: Is there any software, source-code, or well documented and easily implementable research (I am not afraid for a little bit of Python) to do the following: Take two similar videos from ...
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26 views

.ptw Video conversion

On Video recording with IR camera, a file in .ptw is obtained. I want to analyze the file using standard software, like MATLAB. However, video processing in MATLAB requires the file to be converted to ...
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Detecting inset images/videos from a video

I want to detect multiple rectangles in a video, each of which features a different content, but running simultaneously. This is typically seen during debates on news channels. For example, in the ...
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Finding a (solved, held) Rubik's Cube

I want to track the orientation of a held but not-mixed-up Rubik's Cube in a video. I've already tried a few things. The most successful has been: Do adaptive line detection Look for crossing ...
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16 views

Are there algorithms to detect SD upscaled?

I was wondering, if it was possible to flag video streams which have been upscaled? I know those frames are often smoother than the originals (gradients are lower for example) but it doesn't allow me ...
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43 views

Detect laser beam and on/off pulses using camera

I'm trying to detect blinks of laser via vision. The laser blinks at 11.99Hz and the camera is taking in frames at 24 fps. As far as the Nyquist rate(the sampling theorem) is concerned, the supposed ...
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54 views

Image and video processing in matlab

I have been working on Digital signal processing since Feb-2013. I have good command over it. Now I want to expand work in field of IMAGE and Video processing. Please suggest me best practical guide ...
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Please suggest me good algorithm for video segmentation based on changing background?

Iam having 1 min video.I need to cut the video into 5 segments depending on changing background.Please suggest me good algorithm which can be easily implemented in matlab.Please provide me helpful ...
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152 views

Counting human movement of exercise using ROI or pre-set passing line with OpenCV

I'm currently doing my final year Degree in computing studies. The project I'm working on is a video of a webcam or computer webcam to have 2 pre-defined ROI (Region of Interest) on top and bottom ...
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27 views

Why do we observe band when recording CRT monitors or Flouroscent lamp via video recorder?

I understand that this has something to do with difference between refresh rate of monitor (or line frequency used by the ballast in case of Fluoroscent lamp) and frame capture rate of video recorder. ...
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25 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 ...
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39 views

Is there a way to evaluate block size when doing image processing or video processing

I am currently doing foreground segmentation in image sequences. A DCT 8 by 8 feature is extracted for each pixel. Now i want to explore dynamic block size for different scenes. Is there any rules ...
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User-friendly DSP for high-frequency application?

I've been doing some work with creating visual output on oscilloscopes using audio; here are some examples: http://www.youtube.com/watch?v=UJ8-vySqEAI This is using Max/MSP to read from a buffer of ...
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88 views

Detecting scene transitions in a video

How would you reliably detect scene transitions in a video? The simplest case wouldn't be too hard, but sometimes it might be a fast moving scene, or there might be an effect like lightning that would ...
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42 views

Estimating degree of motion in video frames

I have a video (in webm format), and I want to produce a graph that shows the degree of motion in this video as a function of video time. I'm sure there are many different ways to define "degree of ...
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2k views

Remove background from image

I want to remove the background from image. Let's say I have this background: . Then I put pen drive and tippex on it. . Is it possible to remove the background image from second image? If so, ...
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256 views

How to process video with DFT/FFT - getting the frequency of green color changes?

Goal: I have a video stream from a webcam. I need get frequency of the green color changes on the video. Video color space is RGB The signal looks sinusoidal with a frequency range 0.5 - 2.4 Hz I ...
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3k views

How to Count the number of People in a room using CCTV Camera feed?

I am trying to find out how can I count the number of people in a room using the feed coming in from a CCTV camera fixed in one of the top corners of the room. The number of cameras can be 2 at max ...
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How can I improve my motion capture system?

Please excuse me if this is not the proper place to ask this. I just need some general advice. I have set up a very basic homemade motion capture system where I put three TrackIR cameras from ...
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961 views

Access to audio part of the video file [closed]

I have wrote the following MATLAB code but all the AudioFrame are zero ?!? Could anyone help me please ? ...
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108 views

How can I perform object tracking using noisy images?

The problem Take 50+ of Lena images, add gaussian noise to them to the point that you couldn't say it is Lena. I insist, gaussian noise, not gaussian blurring. Now imagine a cropping window randomly ...
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243 views

Calculate total bit rate

I want to calculate the total bit rate of a video system. In order to calculate the total bit rate for a 1080/50p video system(4:2:2) we need: ...
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313 views

Decompose video frames into slices

I am working on a video motion feature implementation. I am implementing a work in a research paper. What I want to implement is this: The frames contained in a video clip can be thought of as a ...
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141 views

Representation of frame image pixels

In paper Human identification using gaits Section 3.2, the authors explain how to represent a 3D image (x,y,t) into 2D image with (x,t) ; (y,t) denoted 1D signals. I have a conceptual doubt which is ...
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64 views

Can anyone suggests some basic readings for video processing?

Actually, I am new to this field and would like to work on a project in Video processing. I have a little background in Image processing but would like to study further in video processing. So, If ...
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333 views

What happens when we Fast Forward the Video

I've been involved in Image Processing kind of project for the last couple of month, before which i had no experience in Image processing. While filtering the image today i had a thought what exactly ...
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1answer
64 views

Projection of 2D signal

Paper describes that a 2D signal(say video) can be projected to 1D for time series analysis by using a transformation function fx=Ax+constant and ...
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495 views

differences in fundamental frequency/pitch between music and speech

I am developping a program, that extracts very expressive frames from a video (meaning: frames, which could summarize a video) for a university seminar. One of my ideas was, to analyze the audio data ...
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1k views

Matlab video processing of Contracting tissues. how to analyze movement?

I'm trying to write a code The helps me in my biology work. Concept of code is to analyze a video file of contracting cells in a tissue Example 1 Example 2: youtube.com/watch?v=uG_WOdGw6Rk And ...
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317 views

Non-orthogonal basis which offers better energy compaction in image compression

I am aware of image-independent basis, i.e. DCT, and image-dependent basis, i.e. Karhunen–Loève, which are used in compacting energies for image compression. These bases are orthorgonal. Are there ...
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247 views

Extremely computationally intensive image/video compression schemes which offer better compression than industry standard JPEG/H.264

I am trying to search for image/video compression schemes which offer superior compression performance (holding image quality as constant) when compared to widely adopted industry standards (i.e. ...
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437 views

Lip sync over IP

What are the most used techniques for lip sync (audio/video sync) for conferencing over IP (and related issues with playout buffering)? I could find a lot of paper about audio intrastream ...
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How do the motion vectors work in predictive coding for MPEG?

In MPEG, there is a process where an image is broken up into macroblocks and a motion vector is computed for each of those macro blocks. You then transmit these vectors, along with the prediction ...
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Slow Scan TV Documentation

I am looking for information on how to decode slow scan TV signals, which is a method of transmitting static images using everyday FM radio. I have seen software but I don't understand how to start. ...