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

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Matching two video conversations

I have two video where two person having conversation. They begin recording different times. I want to match these two videos' frame numbers, i.e. By matching audio. How can I do that?
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33 views

Difference between video mosaicing and video stitching

What is the difference between video mosaicing and video stitching ,is this both are similar or is there any methodology difference?
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24 views

How to increase the resolution of a video from a sequence of photos?

I have a video filmed in a relatively low quality and resolution and a sequence of photos of higher quality taken of the same scene at the rate of about one image every two seconds or so. Could those ...
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12 views

Error correction in a video feed

How does one write software to minimize errors? As in, say I'm trying to look for contours in a region of interest. After writing down the program for contour detection, when I test it the contours ...
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25 views

HEVC Deblocking filter algorithm

I'm doing research on block noise caused by video compression (especially in newer codecs) and I've read the IEEE article about the HEVC deblocking filter (here). However, when reading the algorithm ...
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37 views

Intra refresh: periodic vc cyclic

What's the difference between the periodic and cyclic intra refresh techniques? I understand the intra refresh in general; supply intra coded information at a more constant bitrate by stretching it ...
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79 views

Reliable detection of facial feature points

What I need is a very reliable and relatively fast (video processing) way to locate facial features. I tried stasm (http://www.milbo.users.sonic.net/stasm/) and a BoRMaN ...
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18 views

Optical Flow Problems

I was wondering if any of you guys could help me with the next 3 problems. They're about estimating the lamda on the Optical Flow equation $E = E_s + λE_c$, for different situations that try to ...
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67 views

Image processing for eye movements

I have series of images extracted from a eye tracker video for both eyes. is there any image processing algorithm/method/technique available to find the following from those images: Horizontal eye ...
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27 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.
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49 views

Why does cel-shading sometimes look similar to rotoscoping?

Why does cel-shading sometimes look similar to rotoscoping? Rotoscoping: A Scanner Darkly: Cel-shading: Wikipedia: Cel-shading, Teapot Example:
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138 views

Is it possible to have negative PSNR?

I have been working on image processing. I have an image and then add it a Gaussian noise with standard deviation=0.005. then using averaging filter to denoise it (I know it is not a good idea). then ...
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33 views

Noise modeling and reduction in Video when we have just noisy video

We would like to send a video (sequence of images), we have limit bandwidth. If there is a lot of noise, the required bandwidth (bitrate) is needed to send the video+noise becomes high that is not ...
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71 views

System Requirements in Computer Vision

I am interested in developing a research on object recognition using artificial neural networks. The problem is that I don't know what the system requirements of a computer vision project. A raspberry ...
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9 views

Extracting coeff_token from h264

I'm trying to parse an h264 stream and I've run into trouble trying to figure out how to extract coeff_token from the stream. The spec doesn't seem to say how you are supposed to know how many bits to ...
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20 views

What is the best way to detect audio drops (audio level drops irregularly) in a video?

While recording a video, due to some problem in microphone (like low battery ) audio level go down inconsistently (voice____Voice__), I am trying to figure out an solution for this, is there any way ...
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25 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 ...
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25 views

object classification in a video

we are doing a project on object detection and classification in a video using MATLAB. we have been able to detect the objects present in the video.but we can't seem to find any classification code. ...
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25 views

Is it correct to call this Gaussian Mixture Model?

Some poeple claim their background subtraction algorithms use Gaussian Mixture Model, but when I read the code, I find they actually use only one component, and as a result EM algorithm (or its ...
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19 views

Extract features from video based on temporal frequency

Situation is as following: there is a video, 2d sequence of frames, each of which contains still picture of beating heart, or some other oscillating object. Also each picture contains some features, ...
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26 views

Equivalent of the Shepp-Logan phantom for video denoising

The Shepp-Logan phantom is a standard test image used in reconstruction algorithms as well as image denoising. Does an equivalent image sequence exist for testing video denoising algorithms? I know ...
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53 views

DICOM codec for Windows Media Player

I have been searching online for a DICOM codec which allows me to play DICOMs in Windows Media Player. I found Dicom Media Bridge which is not free. Could someone let me know if there is a codec for ...
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52 views

Video: Detecting a digital timer and when it ticks

Input: A video with a digital timer, possibly several hours long, such as this video. The timer might use any font or color, and might be located anywhere on the video, but it probably won't fill the ...
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115 views

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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12 views

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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55 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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15 views

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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33 views

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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63 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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132 views

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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128 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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29 views

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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62 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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25 views

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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247 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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40 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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27 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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57 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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43 views

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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152 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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58 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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3k 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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430 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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4k 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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26 views

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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1k 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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126 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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436 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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361 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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148 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 ...