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Questions tagged [motion-detection]

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10
votes
1answer
3k views

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 ...
9
votes
4answers
978 views

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 (...
9
votes
1answer
342 views

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 ...
4
votes
1answer
1k views

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 ...
4
votes
4answers
120 views

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, ...
3
votes
7answers
4k views

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 ...
2
votes
2answers
4k views

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 ...
2
votes
1answer
2k views

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, ...
2
votes
0answers
453 views

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 ...
2
votes
0answers
89 views

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 ...
1
vote
1answer
117 views

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 ...
1
vote
1answer
6k views

OpenCV Motion Analysis: Optical Flow vs Motion History

OpenCV Motion Analysis Documentation lists multiple techniques for motion tracking: Sparse Optical Flow | calcOpticalFlowPyrLK, Dense Optical Flow | calcOpticalFlowFarneback, and Motion History ...
1
vote
1answer
559 views

Correlating accelerometer data

I am getting a signal from a device. This signal contains a non-random noise signal in it. I want to remove that noise from the signal. This noise is correlated to the motion the device is having. So ...
1
vote
0answers
30 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 ...
1
vote
1answer
147 views

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, ...
1
vote
0answers
81 views

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 ...
1
vote
0answers
70 views

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 ...
0
votes
2answers
755 views

Algorithm to effectively find perspective transform in motion estimation

I've shot a series of photographs in a sort of stop-motion fashion, and although the camera was mounted on a tripod, there are tiny motions between each two successive photos. After some ...
0
votes
2answers
607 views

Possible ways to determine the direction of moving object?

I'm trying to determine the moving direction of an object in x-axis only. Figure below shows part of my effort. However, I got stuck. As you can see from the middle image, the green represent the ...
0
votes
1answer
95 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 ...
0
votes
0answers
18 views

Can “Frame Difference Method' be apllied for ”Motion Detection Based Anti-Theft Project"?

I am new with image processing. I will start to a project named "Motion Detection Based Anti-Theft Project" as i said. I have to use MATLAB and STM32F4 microcontroller in this project. I don't want to ...