Skip to main content
Share Your Experience: Take the 2024 Developer Survey

Questions tagged [video-processing]

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

Filter by
Sorted by
Tagged with
1 vote
0 answers
49 views

No prior research? What am I not understanding? Using deep learning to enhance videos by predicting the best filters or histogram transforms to apply

I would like to make a large set of videos more visually pleasing by adjusting colors, saturation, contrast, etc. However, the techniques that I can find online roughly fall into these two categories: ...
elgehelge's user avatar
  • 111
0 votes
0 answers
19 views

Noise on microscopy data

I have to analyze beating cardiomyocytes. In order to do so, I have written a Matlab script to replicate the method found in Béland et al., Front. Physiol. (2022) (doi: doi.org/10.3389/fphys.2022....
Lorenzo's user avatar
0 votes
0 answers
9 views

Is it possible to introduce (banding, moire and other effects) on a presented video that makes it impossible to capture with an iPhone?

an absolute noob here, so possibly a silly question. I wonder if it's possible through video editing, to purposefully induce screen capture distortion effects on a video to such an extent that when ...
Akinator1234's user avatar
2 votes
0 answers
19 views

Defining the PSNR for images in CIE-LUV or CIE-XYZ or CIE-HCL spaces

In image compression applications, we know that for an 8-bit 0 to 255 level grayscale image the PSNR (peak signal to noise ratio) can be defined through the MSE as: $$MSE=\frac{1}{mn}{\displaystyle \...
user3236841's user avatar
4 votes
1 answer
71 views

Video Alpha Matting

I'm looking to composite an opaque object (e.g. 3D art) into video footage of semitransparent fog/clouds before a landscape background so that the object seems immersed in the clouds but occludes the ...
LogicBreaker's user avatar
1 vote
4 answers
70 views

How can I analyse the motion of plasma

I am currently attempting a project of plasma analysis. One of the aspects of this project is to determine the stability of the plasma, when a plasma is unstable it loses its shape partially or starts ...
NARAS's user avatar
  • 13
0 votes
2 answers
72 views

What's the purpose of dividing the light and combining back in TV Cameras?

This is usually a two-part, trichroic prism that divides the light into separate red, green, and blue beams, each of which is detected by a separate CCD or CMOS image sensor. A circuit (3) ...
Sammy Matt's user avatar
1 vote
1 answer
207 views

Relationship between fps and time stamps

I am getting a bit confused about fps (frame rate) in a video. I build a video (using python and opencv) using 600 frames and I specify 10 fps. However I want to also record the timestamps for each ...
KansaiRobot's user avatar
4 votes
1 answer
457 views

Difference between frame and image?

This term'Frame' is often used in image processing for frame rate, but is there any difference between an image and a frame?
jojo's user avatar
  • 83
1 vote
1 answer
704 views

My fft gives always gives the correct frequency or double the correct frequency

I will do anything to get help. Please help me find a solution. I can safely say that my fft algorithm, implemented with pyfftw, works as intended when a sine wave with a certain frequency is passed. ...
niciola's user avatar
  • 11
1 vote
1 answer
48 views

When a face collapses into a swirling black hole on a video conference call like this is it due to some advanced AI-based error-correction gone wrong?

Within this newscast video1 a video conference call is shown. Between 02:23 and 02:37 the face of the interviewee appears to get ...
uhoh's user avatar
  • 231
0 votes
0 answers
176 views

Convert h264 to VFR mp4 with duplicated frames/timestamps

I have a .h264 video file with a separate text file containing timestamps for each frame in timestamp v2 format. Where the ...
Jaka's user avatar
  • 1
1 vote
1 answer
83 views

Difference H264 and H265 algorithms

I try to understand difference of H264 and H265 video compression algorithms. However, I confused the algorithms of uses in H264 and H265. In addition, I found a few differences between these two ...
bb0667's user avatar
  • 103
0 votes
1 answer
63 views

Video-Encoding planes

I am currently developing an Android Application for Video-Streaming. Now i came to the point where I wanted to manipulate the stream. From the API I am using I have 6 methods available for each Frame ...
Daniel's user avatar
  • 111
0 votes
2 answers
246 views

Fringe movement analysis to extract displacement

I am using a Michelson interferometer with the interferogram recorded on a CMOS sensor. I have taken a video of the fringes moving when a displacement of 50 $\mu m$ is imposed to one of the mirrors. ...
Gianluca's user avatar
1 vote
1 answer
106 views

Remove watermark from video

Is there a process to remove a watermark ever present across all frames of a video? I was thinking that comparing frames and taking pairs poorly correlated, could give a clue about the watermark both ...
Leopoldo Sanczyk's user avatar
1 vote
1 answer
2k views

Defining the SNR or PSNR for color images (3 channel RGB files)

In image compression applications, I know that for an $8$-bit $0$ to $255$ level grayscale image the PSNR (peak signal to noise ratio) can be defined as: $$ \text{PSNR} = 10 \log_{10} \frac{\sum_{m,n} ...
Iconoclast's user avatar
1 vote
1 answer
57 views

Can you do temporal frequency filtering for a spatially moving signal in image sequence?

Context : A static camera captures video footage of a still indoor environment at given framerate (1080p@30fps or 720p@60fps) A low power line laser projects a line shaped beam in the camera field of ...
Z. Ajili's user avatar
4 votes
1 answer
255 views

Map time/scene differences between two similar videos

Goal: Given two videos that are episodes from series but in different format (one Bluray/one TV for example), map the time differences between the two (which scenes are not in one of the two) and be ...
MrVhek's user avatar
  • 41
3 votes
2 answers
122 views

2D to 3D view conversion

I came across this demo by Fox sports: https://youtu.be/N9SxFf5WCb0 Where they show a player's view in a 360 space. Very smooth and nice. I was wondering how do they achieve it without any cameras ...
Tina J's user avatar
  • 193
3 votes
1 answer
874 views

How virtual ads work in stadiums?

I was looking at a technology which enables virtual advertisement on the perimeter ads in soccer. It's relatively an old technology for a few years back, but I'm surprised to see the quality of it. ...
Tina J's user avatar
  • 193
1 vote
1 answer
794 views

Detect non rectangular bounding box for objects

I have a short video where a TV is shown. I need to detect the TV there (let's assume it's all pure black or it's covered with a green screen), and overlay a video on top of it on the same area. But ...
Tina J's user avatar
  • 193
3 votes
0 answers
66 views

Frame lookup using audio

I'm an animator trying to get a program that will use machine learning to automate the lip syncing process. The program I need made will have two files given to it: a seed, and an audio file. The seed ...
dsp101's user avatar
  • 31
1 vote
2 answers
62 views

Confusions regarding frame rate?

We know that when many image are shown in succession they create illusion of video But what is the minimum rate of frame/images so that still images appear as video? In this case, images/frames are ...
DIP_fan's user avatar
  • 25
1 vote
0 answers
48 views

What is the best technique for underwater imaging?

I am currently researching what the best method to take underwater images/video is. The papers I have read go into several different methods: Lidar, Synthetic Aperture Sonar (SAS), optical camera plus ...
Jake's user avatar
  • 336
2 votes
1 answer
28 views

Is it possible to calculate/estimate the storage space a certain duration of .mp4 video files will take up?

Is it possible to calculate/estimate the storage space a certain duration of .mp4 video files will take up? I have the resolution (eg. 4000 X 3000), the format (H.264 or H.265), the audio format (AAC) ...
forgodsakehold's user avatar
3 votes
0 answers
252 views

Algorithm for smoothing the output of an object detector operating on a video?

Please could you point me towards an algorithm that takes a series of object detections performed on a frame by frame basis as input and outputs a filtered series of object detections in which the ...
ezekiel's user avatar
  • 173
1 vote
1 answer
459 views

How to calculate bitrate of PAL?

I have to calculate the bitrate of PAL format $\ (576*720) $. I have the following data: $\ 25 $ frames per second Interlaced Interior representation is: $\ 4:2:0 $ $\ 8 $ bpp I have tried the ...
Teo Protoulis's user avatar
1 vote
0 answers
79 views

Fast and Slow motion video detection using Optical Flow

I'm trying to calculate a "video motion" value in a given video sequence, meaning how fast or slow motion the video is. For instance, if a video is about a car racing, the value is high. Whereas if ...
Tina J's user avatar
  • 193
0 votes
1 answer
556 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 ...
Shakti Dagar's user avatar
12 votes
0 answers
225 views

Converting very short "motionless" video frames to single, better-resolved, images

I made a mistake with my newly bought compact camera, before a trip to Japan. Instead of taking single pictures, I ended up with a few short "MP4" video files (1 second, 2-3 frames). I could ...
Laurent Duval's user avatar
1 vote
0 answers
357 views

FFmpeg Block Motion Compensation Only

is there a way to just perform block motion compensation using ffmpeg command line (i.e. no addition of residual encodings). I want to compare the quality of the video frames produced using various ...
André's user avatar
  • 11
0 votes
2 answers
210 views

Correlation between 2 signals of uneven dimensions

As a part of my work, I am trying to correlate the audio signal in a video with the pixels of each frame. The steps I follow are: Audio sampling rate and frame rate of the video are known. So, ...
Curiosity's user avatar
  • 367
1 vote
0 answers
1k views

Detection of Video Quality Using Python

I am getting started with image/video processing. As a start I have a dataset for which the goal is to detect the quality as the video progresses. Based on my readings I think any video under test ...
user avatar
2 votes
1 answer
643 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,...
Roger Sanders's user avatar
0 votes
2 answers
645 views

Interpolation of audio for new frames

I am trying to upsample a video by existing frame interpolation techniques. In the process, I realize that I also need to interpolate the audio signal for the new frames so that the audio signal is in ...
Curiosity's user avatar
  • 367
-1 votes
1 answer
598 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 ...
stronk_kisik's user avatar
0 votes
1 answer
92 views

Decoding a video signal, how to get frame output to matrix for calculations?

I'd like to use python to take a video (eventually a stream) and map each frame to an RGB array of pixels. My first thought was to use ffmpeg bindings, and in memory (if possible) convert it to png ...
Justin's user avatar
  • 103
4 votes
1 answer
589 views

How to Find the Probability of Kalman Filter States?

I am working on a video object tracking problem. I am using Kalman filter to predict and correct the object position return by an algorithm such as CamShift. I want to adjust the likelihood ...
Dr. Strange's user avatar
0 votes
1 answer
49 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. ...
Bonnie's user avatar
  • 3
2 votes
1 answer
86 views

Is signal processing used in block matching algorithms

I'm working on a custom video codec which uses the standard mean squared error to find blocks. As explained by this youtube video you choose a search area size to find a block in. Each pixel of the ...
YAHsaves's user avatar
  • 143
8 votes
2 answers
2k views

How Can I Remove Flickering Background in a Video?

I have a black and white video taken with a high speed camera and I notice a background flickering coming from my LED light. The images alternate from dim to bright and it makes the videos quite ...
user avatar
0 votes
0 answers
157 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 ...
skr's user avatar
  • 283
-1 votes
1 answer
375 views

How to use optical character recognition program to read coins? [closed]

I had a friend that goes through my pennies trying to find valuable rare pennies. Instead of looking at each one could a optical character recognition program be used to flag coins?
Muze's user avatar
  • 1
2 votes
1 answer
72 views

How to recognize for small video sequence with a large sequence?

I'm working on the idea of recognizing a small video sequence (a sequence of 18 seconds) within a long one (a sequence of 15 minutes), the first idea that comes to mind stats that I have to ...
azdoud's user avatar
  • 121
1 vote
1 answer
227 views

temporal high-pass filtering to approximate phase derivative

I am currently following the algorithm as based on a previously published research article "A Motion Detection Algorithm Using Local Phase Information" by Lazar et al. The basic overview of the ...
hectorcho's user avatar
1 vote
1 answer
262 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 ...
Tina J's user avatar
  • 193
0 votes
2 answers
7k 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 ...
Della's user avatar
  • 109
0 votes
1 answer
1k views

Measure the amount of drift in video and audio frames

I setup a stereo system using 2 GoPro Hero Session Cameras, since I need a larger baseline than the one of the Dual Hero System. This unfortunately means the two cameras are not ...
Matteo's user avatar
  • 251
1 vote
0 answers
42 views

Identifying license plate number of a thief's car from a Picture [closed]

I recently had the mail in my mailbox stolen from my home. I caught the whole thing on video and was able to identify the woman. Just a few days after the mail theft incident I went into a local post ...
Euxitheos's user avatar
  • 111