Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [motion-detection]

20 questions
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Vehicle counting from a video

Disclaimer: I posted this question on StackOverFlow but learned that it is better suited here. I am a bit new to image processing so I'd like to ask you about finding the optimal solution for my problem, not help for code. I couldn't think of a good…
Horizon1710
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Vehicle segmentation and tracking

I've been working on a project for some time, to detect and track vehicles in video captured from UAV's, currently I am using an SVM trained on bag-of-feature representations of local features extracted from vehicle and background images. I am then…
Jono Brogan
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Fast approximate optical flow / image shift

I need to detect how fast a camera is panning (either horizontal/vertical) to give a warning to the operator to slow down. The entire image is moving as a block, I don't need an actual direction (although H or V would be a bonus) and I only need an…
Martin Beckett
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Detecting moved and dirty areas between two snapshots/images

I'm new to image processing and trying to figure out best way to identify 'moved' and 'dirty' rectangles between two desktop screenshots.Basically, lets say there is a round circle moving on a screen, there is a text that is changing e.g.…
tunafish24
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Image Registration and optical flow

Image registration algorithms can be classified into intensity-based and feature-based algorithms, I want to know When and Why should i choose intensity or feature based algorithm? another question Is there a difference between image registration…
HforHesham
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how to detect and capture scene change in a recorded video

I have a project to detect and capture scene change in a recorded video.Actually its a recorded video of a godown (of about 2 weeks) and I have to detect and capture pic whenever someone comes in. I have tried vlc player motion detector. It detects…
burhan
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Extracting motion vectors from H.264 bitstream

I'm looking for an open-source tool/code or some guidance to extract the motion vectors (MVs) of a H.264 encoded bit sequence. I'm already aware that motion vectors can be visualized using ffmpeg with the following command: ffplay -flags2…
chronosynclastic
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How to get translation and roation data using 6DOF MPU6150

I am trying to get the position data from an IMU 6 Degrees of Freedom (MPU-6150) board using an Arduino Uno. I am trying Jeff Rowberg’s example MPU6050_DMP6.ino that may be found here. This is the first time I am working with an IMU. I have no idea…
Sanjeevi
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How to do people detection from bird eye view?

I'm trying to do people detection from bird eye view. Actually, it is not a normal bird eye view because I don't have RGB images but I have disparity map, depth map as well. In these kind of images, people are shown like lines that represent a…
user1768064
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Motion and Distortion Estimation using multiple still images?

TL/DR: I'd like to take the median of lots of images to make a single "better" image. The problem is, the camera is slowly moving, and there is significant lens distortion. On the plus side the motion is constant, I've got lots of images,…
Benjamin H
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Searching for image samples in order to create custom classifier

I am training a classifier of my own, specifically for detecting body arms. According to the training process I have to provide positive samples and negative samples, wich will be used in the different stages of the cascade classifier. As Mathworks…
Daniel Conde Marin
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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 the video is about two persons standing/talking,…
Tina J
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Motion detection one threshold over dataset

We're working on a project where we have to detect the moments where motions happen in a medical scene. I have a data set of 20 videos that are closely resemble (Same camera & configuration used, same shooting/environment conditions etc...). Here is…
Maystro
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Anti tremor motion detection

I'm programming in c# using opencv (emguCV). I use motion detection approach to detect some changes in a paper wall. For example it's may be colored by a laser pointer. My problem is that when I use motion detection, some unwanted changes are…
Babak.Abad
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Optical flow equation and real images

We know optical flow equation cannot be calculated without additional constraints. But what I cannot figure out is why it does not hold exactly for real images? This equation has gradient and so, it can be used to estimate the motion vectors by…
David
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