Multiple Object Tracking by Scale Space Representation of Objects, Method of Linear Assignment, and Kalman Filter

Multiple objects tracking is a challenging task. This article presents an algorithm which can detect and track multiple objects, and update target model automatically. The contributions of this paper as follow: Firstly,we also use color histogram(CH) and histogram of orientated gradients(HOG) to represent the objects, model update is realized by kalman filter and gaussian model; secondly we use Gaussian Mixture Model(GMM) and Bhattacharyya distance to detect object appearance. Particle filter with combined features and model update mechanism can improve tracking results. Experiments on video sequences demonstrate that the method presented in this paper can realize multiple objects detection and tracking.

This paper introduces a joint learning architecture (JLA) for multiple object tracking (MOT) and multiple object forecasting (MOF) in which the goal is to predict tracked objects’ current and future locations simultaneously. MOF is a recent formulation of trajectory forecasting where the full object bounding boxes are predicted rather than trajectories alone. Existing works separate multiple object tracking and multiple object forecasting. Such an approach can propagate errors in tracking to forecasting. We propose a joint learning architecture for multiple object tracking and forecasting (MOTF). Our approach reduces the chances of propagating tracking errors to the forecasting module. In addition, we show, through a new data association step, that forecasting predictions can be used for tracking objects during occlusion. We adapt an existing MOT method to simultaneously predict current and future object locations and confirm that JLA benefits both the MOT and MOF tasks.

The Kalman filter has long been regarded as the optimal solution to many applications in computer vision for example the tracking objects, prediction and correction tasks. Its use in the analysis of visual motion has been documented frequently, we can use in computer vision and open cv in different applications in reality for example robotics, military image and video, medical applications, security in public and privacy society, etc. In this paper, we investigate the implementation of a Matlab code for a Kalman Filter using three algorithm for tracking and detection objects in video sequences (block-matching (Motion Estimation) and Camshift Meanshift (localization, detection and tracking object)). The Kalman filter is presented in three steps: prediction, estimation (correction) and update. The first step is a prediction for the parameters of the tracking and detection objects. The second step is a correction and estimation of the prediction parameters. The important application in Kalman filter is the localization and tracking mono-objects and multi-objects are given in results. This works presents the extension of an integrated modeling and simulation tool for the tracking and detection objects in computer vision described at different models of algorithms in implementation systems.

We present experiments to illustrate tracking of occluded objects using three-dimensional (3D) integral imaging (II). Tracking of heavily occluded objects by conventional two-dimensional (2D) image processing may be difficult owing to the superposition of occlusion noise and object details. The effects of occlusion are remedied by 3D computational II reconstruction. We use a summation of absolute difference (SAD) algorithm between pixels of consecutive frames of a moving object for 3D tracking. SAD algorithm is not robust for 2D images of occluded objects; 3D computation reconstruction of the scene allows implementation of a SAD algorithm by reducing occlusion effects. Experimental results demonstrate 3D tracking of occluded objects. To the best of our knowledge, this is the first report on 3D tracking of objects using II.

Real time object tracking is an essential part of surveillance and robot applications. The performance of any object tracking system depends on its accuracy and its ability to deal with various sizes of objects, for better results the tracking should happen at a high speed. Object tracking can be defined as the process of segmenting the region of interest from the video sequence and keeping track of the motion in order to extract useful information. The basic fundamentals of video surveillance such as object detection, tracking and recognition using multiple cameras. Whenever an object enters a video frame, it is detected using background subtraction and the detected objects are tracked with a novel Bayesian Kalman filter with simplified Gaussian mixture (BKF-SGM). Object recognition algorithm is applied using Gait method which is employed to support multiple object tracking with its robust performance. Processing of image is done in MATLAB to get detection, tracking and recognized results.

Multiple object tracking is one field of study in vision-based navigation. Basically, in many current-research of this study, the common method in object tracking consists two main parts such as object detection and motion prediction, Object detection is highly related to the image processing which has a high tendency in using biggest part of computation resources. But, for the certain purpose, the computation resources should be used in proper way. In this paper, the problem will be limited in the case of football player tracking which needs so many computation resources for the image processing such the motion prediction algorithm that should be significantly reduced this need without decrease the system performance. In this paper, there will be explained the implementation of modified Hungarian algorithm and Kalman Filter as the main core of the motion prediction system in this case. Kalman Filter is the simplest algorithm for motion prediction, but in the case of multiple objects, there should be an additional computing to identify detected object before it will be tracked. Besides that, the system should have an ability to maintain object's identity in many worst case like occlusion, and boundary condition. In this paper, there also be explained the performance and consideration to increase system performance. In the highlight, the implementation result state that multiple point tracking module successfully being implemented as a part of fast multiple object tracking systems for football. The main indicator is identity maintainability which reaches 10% in 800 sample frames. Besides that, the computation parameter could be quantified using statistics that include the threshold value for data association is 2 meters per frame and 6 meters per frame for occlusion threshold. In the computational resources needs analysis, using worst case approximation, the system will need approximately 26 KB memory for computing in each frame. By this result, the conclusion is that the tracking system is proper to be implemented in football player tracking system both from the computation resources need and the performance.

Multiple object tracking is one field of study in vision-based navigation. Basically, in many current-research of this study, the common method in object tracking consists two main parts such as object detection and motion prediction, Object detection is highly related to the image processing which has a high tendency in using biggest part of computation resources. But, for the certain purpose, the computation resources should be used in proper way. In this paper, the problem will be limited in the case of football player tracking which needs so many computation resources for the image processing such the motion prediction algorithm that should be significantly reduced this need without decrease the system performance. In this paper, there will be explained the implementation of modified Hungarian algorithm and Kalman Filter as the main core of the motion prediction system in this case. Kalman Filter is the simplest algorithm for motion prediction, but in the case of multiple objects, there should be an additional computing to identify detected object before it will be tracked. Besides that, the system should have an ability to maintain object's identity in many worst case like occlusion, and boundary condition. In this paper, there also be explained the performance and consideration to increase system performance. In the highlight, the implementation result state that multiple point tracking module successfully being implemented as a part of fast multiple object tracking systems for football. The main indicator is identity maintainability which reaches 10% in 800 sample frames. Besides that, the computation parameter could be quantified using statistics that include the threshold value for data association is 2 meters per frame and 6 meters per frame for occlusion threshold. In the computational resources needs analysis, using worst case approximation, the system will need approximately 26 KB memory for computing in each frame. By this result, the conclusion is that the tracking system is proper to be implemented in football player tracking system both from the computation resources need and the performance.

This paper describes a technique for tracking single objects moving within the guarded scene during dynamic occlusion situations. The processing modules used for object detection and tracking will be shown in detail and the performances of the algorithm discussed. The proposed approach uses an empty reference image for object extraction through image difference; the reference frame is updated continuously by a background updating module taking into account the detected objects. The tracking module is responsible for objects labeling being able to preserve objects identity even when an overlapping occurs on the image plane between different objects. A shape matching technique is used that is based on a linear Kalman filter. The system has been tested on several outdoor sequences showing dynamic occlusions among objects in order to show the validity of the approach.

In this book chapter, we propose a fully automated approach for tracking of multiple objects across multiple cameras with overlapping and non-overlapping views in a unified framework without initial training or prior camera calibration. For tracking with a single camera, Kalman filter and adaptive particle-sampling techniques are integrated for multiple objects tracking. When extended to tracking over multiple cameras, the relations between adjacent cameras are learned systematically by using image registration techniques for consistent handoff of tracking-object labels across cameras. In addition, object appearance measurement is employed to validate the labeling results. Experimental results demonstrate the performance of our approach on real video sequences for cameras with overlapping and non-overlapping views.

We propose a real-time multiple object tracking method for smart environment applications. The proposed method combines identity features and tracking features for robust long-term object tracking. Face is a stable feature for identifying different subjects. However, face is not reliable for object tracking. Whole body color histogram is more resistant to object scale and pose changes, which has been widely applied in short-term object tracking. Unfortunately, color histograms are not stable over a relatively long period of time. In smart environments, same subjects may have different clothes over a long time span. We propose a method to combine these two features, the identity features and tracking features, to achieve reliable multiple object tracking in smart environments. A fast object labeling approach is proposed to track multiple objects in real time. The proposed method has clear advantage over traditional single feature methods. Experiments confirm that the proposed method can reliably track multiple human objects in real time through long video sequences.

In the tracking‐by‐detection approach of online multiple object tracking (MOT), a major challenge is how to associate object detections on the new video frame with previously tracked objects. Two important aspects that directly influence the performance of MOT are quality of detection and accuracy in data association. The authors propose an efficient and unified MOT framework for improved object detection, followed by enhanced object tracking. The object detection and tracking are considered as two independent functions in the tracking‐by‐detection paradigm. In this study, object detection accuracy has been increased by employing a faster region‐based convolutional neural network (Faster R‐CNN) modified with the feedback region proposals from the tracker. Target association is performed by the correlation filter‐based Siamese CNN model, which finds the similarity score between the input image patches. The Siamese CNN is trained using a supervised hard sample mining strategy. An optical flow‐based motion model is employed to predict the next probable location of the targets from the tracker and these region proposals are fed back to the classifier module of Faster R‐CNN. The authors’ extensive analysis of publicly available MOT benchmark datasets and comparison with the state‐of‐the‐art tracking methods demonstrate competitive tracking performance of the proposed MOT framework.

With the increasing popularity of Unmanned Aerial Vehicles (UAVs) in computer vision-related applications, intelligent UAV video analysis has recently attracted the attention of an increasing number of researchers. To facilitate research in the UAV field, this paper presents a UAV dataset with 100 videos featuring approximately 2700 vehicles recorded under unconstrained conditions and 840k manually annotated bounding boxes. These UAV videos were recorded in complex real-world scenarios and pose significant new challenges, such as complex scenes, high density, small objects, and large camera motion, to the existing object detection and tracking methods. These challenges have encouraged us to define a benchmark for three fundamental computer vision tasks, namely, object detection, single object tracking (SOT) and multiple object tracking (MOT), on our UAV dataset. Specifically, our UAV benchmark facilitates evaluation and detailed analysis of state-of-the-art detection and tracking methods on the proposed UAV dataset. Furthermore, we propose a novel approach based on the so-called Context-aware Multi-task Siamese Network (CMSN) model that explores new cues in UAV videos by judging the consistency degree between objects and contexts and that can be used for SOT and MOT. The experimental results demonstrate that our model could make tracking results more robust in both SOT and MOT, showing that the current tracking and detection methods have limitations in dealing with the proposed UAV benchmark and that further research is indeed needed.

In this paper we propose a new approach for tracking multiple objects in image sequences. The proposed approach differs from existing ones in important aspects of the representation of the location and the shape of tracked objects and of the uncertainty associated with them. The location and the speed of each object is modeled as a discrete time, linear dynamical system which is tracked using Kalman filtering. Information about the spatial distribution of the pixels of each tracked object is passed on from frame to frame by propagating a set of pixel hypotheses, uniformly sampled from the original object's projection to the target frame using the object's current dynamics, as estimated by the Kalman filter. The density of the propagated pixel hypotheses provides a novel metric that is used to associate image pixels with existing object tracks by taking into account both the shape of each object and the uncertainty associated with its track. The proposed tracking approach has been developed to support face and hand tracking for human-robot interaction. Nevertheless, it is readily applicable to a much broader class of multiple objects tracking problems.

A review of object tracking methods: From general field to autonomous vehicles

A literature analysis has shown that object search, recognition, and tracking systems are becoming increasingly popular. However, such systems do not achieve high practical results in analyzing small moving living objects ranging from 8 to 14 mm. This article examines methods and tools for recognizing and tracking the class of small moving objects, such as ants. To fulfill those aims, a customized You Only Look Once Ants Recognition (YOLO_AR) Convolutional Neural Network (CNN) has been trained to recognize Messor Structor ants in the laboratory using the LabelImg object marker tool. The proposed model is an extension of the You Only Look Once v4 (Yolov4) 512 × 512 model with an additional Self Regularized Non–Monotonic (Mish) activation function. Additionally, the scalable solution for continuous object recognizing and tracking was implemented. This solution is based on the OpenDatacam system, with extended Object Tracking modules that allow for tracking and counting objects that have crossed the custom boundary line. During the study, the methods of the alignment algorithm for finding the trajectory of moving objects were modified. I discovered that the Hungarian algorithm showed better results in tracking small objects than the K–D dimensional tree (k-d tree) matching algorithm used in OpenDataCam. Remarkably, such an algorithm showed better results with the implemented YOLO_AR model due to the lack of False Positives (FP). Therefore, I provided a new tracker module with a Hungarian matching algorithm verified on the Multiple Object Tracking (MOT) benchmark. Furthermore, additional customization parameters for object recognition and tracking results parsing and filtering were added, like boundary angle threshold (BAT) and past frames trajectory prediction (PFTP). Experimental tests confirmed the results of the study on a mobile device. During the experiment, parameters such as the quality of recognition and tracking of moving objects, the PFTP and BAT, and the configuration parameters of the neural network and boundary line model were analyzed. The results showed an increased tracking accuracy with the proposed methods by 50%. The study results confirmed the relevance of the topic and the effectiveness of the implemented methods and tools.