This document discusses improving human detection in images using binary code-based features. It proposes a shifted relational histogram of oriented gradients (SR-HOG) feature that reduces memory usage compared to standard HOG features. SR-HOG works by comparing and shifting the orientation bins of two HOG histograms to generate a binary code. It also introduces a transition likelihood model to represent relationships between binary codes based on quantization residuals from HOG features. The method is evaluated on a human detection dataset, showing SR-HOG reduces computational cost and memory usage while maintaining detection accuracy compared to other binary coding schemes.
3D Reality Tracking in Realtime - Team Hendy-SigitHendy Irawan
油
Combining image processing techniques like human detection and motion tracking with 2D-to-3D reconstruction from camera positions, the system can track human and objects for realtime and offline analysis, such as advanced security or construction project monitoring.
This document summarizes an experimental study on through-the-wall human detection using USRP as a tool. The study was guided by Assistant Professor Keerthi Krishnan K and involved 6 group members. The project aims to transmit a 1GHz pulse and receive the reflected signal to detect humans. In initial phases, a 1GHz sine wave was transmitted and received, including the reflected signal from a human target. Data sets were taken without obstacles and the received signal magnitude response indicated periodic heartbeats. Future work will develop clearer plots to indicate human presence/absence through walls and identify targets under rubble.
Video object tracking with classification and recognition of objectsManish Khare
油
The document discusses an ongoing research project on video object tracking using classification and recognition. It presents the initial progress made, including work on automatic image segmentation using level set methods and detection/removal of shadows. Level set methods allow flexible representation of object contours and boundaries during segmentation. The research aims to automatically track and classify multiple objects in video sequences.
This document presents an HOG-LBP human detector with partial occlusion handling. It begins with an introduction of HOG and LBP features for human detection. It then describes adding cell-structured LBP and concatenating it with HOG to improve performance. Next, it covers handling partial occlusion by segmenting the classifier into local parts and inferring occlusion. Evaluation shows the approach improves detection of occluded pedestrians. It concludes with discussions on speed optimization and a real-time demonstration.
The document discusses background subtraction techniques for detecting moving objects in video frames. It introduces the mixture of Gaussians approach, which models each pixel as a combination of Gaussian distributions to determine if it belongs to the background or foreground. The key advantages of this approach are its robustness to repetitive motions and changes in lighting/weather. The document compares various techniques, then covers implementation details and challenges of applying mixture of Gaussians to an outdoor scene with moving vehicles and foliage.
HUMAN MOTION DETECTION AND TRACKING FOR VIDEO SURVEILLANCEAswinraj Manickam
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An approach to detect and track groups of people in video-surveillance applications, and to automatically recognize their behavior.
This method keeps track of individuals moving together by maintaining a spacial and temporal group coherence.
First, people are individually detected and tracked. Second, their trajectories are analyzed over a temporal window and clustered using the Mean-Shift algorithm.
A coherence value describes how well a set of people can be described as a group. Furthermore, we propose a formal event description language.
The group events recognition approach is successfully validated on 4 camera views from 3 data sets: an airport, a subway, a shopping center corridor and an entrance hall.
The document summarizes recent research on human detection from the 2015 CVPR conference. It describes papers on features and models for human detection, including combination features using HOG, HOB, and HOC. It also discusses training detectors without real data using computer-generated scenes, and improving convolutional neural networks for detection. Benchmark datasets and methods detecting across visible and thermal spectra are also summarized. The document provides an overview of recent advances in computer vision for human detection.
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3. Introduzione
Dataset
Implementazione
Risultati
Conclusioni
Face Detection
Tecniche usate
Raccolta delle feature Histogram of Oriented Gradient (HOG)
Classi鍖catore Structural SVM
Immagine di
input
Calcolo del
Gradiente
Costruzione
dei
descrittori
Raccolta
degli HOG
Structural
SVM
Predizione
Faccia/Non-faccia
Figura: Processo di classi鍖cazione
Andrea Barillari, Federico DAmato Face Detection con Multi-View HOG 3/31
16. Introduzione
Dataset
Implementazione
Risultati
Conclusioni
HOG
Structural SVM
Training
Classi鍖cazione
SVM: Genera una predizione binaria {0, 1}
Structural SVM: Genera una predizione strutturata, nel nostro caso una
quadrupla y = {t, l, b, r}, che rappresenta le coordinate del bounding box
del volto.
Il problema che risolve DLIB:
min1
2 w 2
+ C両
tale che
1
n w 揃
n
i=1 jVi
[率(xi , yij ) 率(xi , yij )] 1
n
jVi
(yij , yij ) 両
Andrea Barillari, Federico DAmato Face Detection con Multi-View HOG 16/31