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

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Depth estimation from live video stream [duplicate]

I have two calibrated cameras and webcam support package and image acquisition toolbox. in this post depth is estimated from two recorded videos but my application is real-time and I want to estimate ...
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23 views

Depth estimation from live video stream in matlab

I want to estimate depth from live video stream with two calibrated webcams in matlab but has no results. In this post depth is estimated with two recorded video files. how can I estimate depth in ...
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24 views

HD frame from Video streaming [closed]

I have a video streaming from a webcam. My intention is to obtain an high definition photo from this streaming. I'm not an expert of signal processing. Should I merge two or more frames of the ...
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8 views

Extracting DCT coefficients from H.264/AVC bitstream

Is it possible to extract DCT coefficients from H.264/AVC bitstream without doing a full-decoding of the video? There are a lot of papers on compressed domain video processing which are based on the ...
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23 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 ...
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13 views

Mobile satellite Help [closed]

I start back at Engineering school on the 19th. I had 2 bad spine operations 35 months ago leaving me in in a wheelchair. Since I can only sit down for 2 hours, I had a 18 wheeler bunk bed ...
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26 views

How to convert lut to 3d lut?

I have a lookup texture below which i got from some website(seems to be 8x8 2d LUT). I want to apply this LUT on a video.  Final cut pro/adobe premiere supports 3d LUT but I dont know to recreate ...
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62 views

Simulate packet loss in internet video streaming

i have encoded H.264 video using ffmpeg . I want to apply packet loss model like Gilbert Eliot model to depict video transmission over unreliable network. Like in this thread TV noise is simulated. ...
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35 views

Which softwares can process 2D Lookup table?

I have a look up table like this... I would like to know which video and image editors can process 2D LUTs.
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25 views

Apply noise in H.264 Stream

I have Encoded H.264 bitstream using JM. I want to pass this stream to the common noisy channel or packet loss models. So that i can check effect of packet loss on perceptual video quality. My ...
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93 views

Detect ending of frame in H.264 video stream

I am using JM reference software for encoding and decoding of video. What I want to do is to add Redundant bits using RS codes to the encoded video so that if some bits get lost during transmission we ...
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Designing 2D DFT filter that works with cycle per degree

Here is my question regarding 2d dft. I know how to do 2d-dft and convolution and filtering. However, I still have a basic question. Maybe I have not understand the concept, and that's why I don't ...
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33 views

Comparing AR coefficients derived from different sampling rates

I'm interested in comparing the coefficients of AR processes computed from different dynamic texture videos. That is, $A_1$ and $A_2$ are the $d \times d$ coefficients for dynamic texture videos 1 and ...
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62 views

Live Video processing using hadoop?

How can I process a live video stream using hadoop? Case in point is Opencv, how it processes a live video frame by frame. Can it be done in hadoop? Else, can a mechanism be made in which opencv ...
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24 views

Accurate measurement of object's position on a bayer-filtered and grayscaled images

This is an experience-related question about cameras and image processing. I have a laboratory setup. Under some simplifications it looks like a red ball rolling on a white table (the real setup is ...
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33 views

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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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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52 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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14 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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47 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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79 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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154 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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55 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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97 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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51 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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112 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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355 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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2answers
44 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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126 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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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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31 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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53 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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29 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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25 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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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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81 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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65 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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67 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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66 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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173 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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200 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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33 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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69 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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28 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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2answers
294 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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44 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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32 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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73 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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44 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 ...