We propose a novel approach for head tracking, which combines particle filters with Isomap. The particle filter works on the low-dimensional embedding of training images. It indexes into the Isomap with its state variables to find the closest template for each particle. The most weighted particle approximates the location of head. We develop a synthetic video sequence to test our technique. The results we get show that the tracker tracks the head which changes position, poses and lighting conditions.
标签： approach combines particle tracking
上传时间： 2016-01-02
上传用户：yy541071797
In this paper, we consider the problem of filtering in relational hidden Markov models. We present a compact representation for such models and an associated logical particle filtering algorithm. Each particle contains a logical formula that describes a set of states. The algorithm updates the formulae as new observations are received. Since a single particle tracks many states, this filter can be more accurate than a traditional particle filter in high dimensional state spaces, as we demonstrate in experiments.
标签： relational filtering consider problem
上传时间： 2016-01-02
上传用户：海陆空653
Rao-Blackwellised Particle Filters (RBPFs) are a class of Particle Filters (PFs) that exploit conditional dependencies between parts of the state to estimate. By doing so, RBPFs can improve the estimation quality while also reducing the overall computational load in comparison to original PFs. However, the computational complexity is still too high for many real-time applications. In this paper, we propose a modified RBPF that requires a single Kalman Filter (KF) iteration per input sample. Comparative experiments show that while good convergence can still be obtained, computational efficiency is always drastically increased, making this algorithm an option to consider for real-time implementations.
标签： Particle Filters Rao-Blackwellised exploit
上传时间： 2016-01-02
上传用户：refent
The need for accurate monitoring and analysis of sequential data arises in many scientic, industrial and nancial problems. Although the Kalman lter is effective in the linear-Gaussian case, new methods of dealing with sequential data are required with non-standard models. Recently, there has been renewed interest in simulation-based techniques. The basic idea behind these techniques is that the current state of knowledge is encapsulated in a representative sample from the appropriate posterior distribution. As time goes on, the sample evolves and adapts recursively in accordance with newly acquired data. We give a critical review of recent developments, by reference to oil well monitoring, ion channel monitoring and tracking problems, and propose some alternative algorithms that avoid the weaknesses of the current methods.
标签： monitoring sequential industria accurate
上传时间： 2013-12-17
上传用户：familiarsmile
To estimate the input-output mapping with inputs x ％ and outputs y generated by the following nonlinear, ％ nonstationary state space model: ％ x(t+1) = 0.5x(t) + [25x(t)]/[(1+x(t))^(2)] ％ + 8cos(1.2t) + process noise ％ y(t) = x(t)^(2) / 20 + 6 squareWave(0.05(t-1)) + 3 ％ + time varying measurement noise ％ using a multi-layer perceptron (MLP) and both the EKF and ％ the hybrid importance-samping resampling (SIR) algorithm.
标签： input-output the generated following
上传时间： 2014-01-05
上传用户：royzhangsz
C语言进阶,包含以下的内容:C语言进阶－第一讲概述.pdf\C语言进阶－第二讲C语言复习.pdf\C语言进阶－第三讲编译汇编调试.pdf\C语言进阶－第四讲存储器与指针.pdf\C语言进阶－第五讲 数据结构与链表.pdf\C语言进阶－第六讲中断与驱动.pdf\C语言进阶－第七讲编码风格.pdf\C语言进阶－第八讲编写安全无错的代码.pdf\C语言进阶-lmalloc 第四讲代码.rar\C语言进阶－ASIX Win link list 第五讲代码.rar
上传时间： 2016-01-16
上传用户：pinksun9
This m-file simulates MPSK (BPSK,QPSK,8PSK)with theoretical and simulated results using Gray coding. Numerical examples of a satellite link design are shown using QPSK and/or 8PSK when the bit rate(Rb)is greater than the channel bandwidth Wc (Band-limited channel).
标签： theoretical simulates simulated results
上传时间： 2016-01-19
上传用户：pompey
Atmel AT91SAM7SE256的一些基本驱动代码， 包括Link Files, 中断源配置， SDRAM, USART, Timer等外设的驱动代码。可用于AT91SAM7SE系列处理器。
上传时间： 2013-12-20
上传用户：zjf3110
Introduction A shared library is a collection of functions that are available for use by one or more applications running on a system. On Windows operating systems, the library is compiled into a dynamic link library (.dll) file. At run-time, the library is loaded into memory and made accessible to all applications.
标签： Introduction collection available functions
上传时间： 2014-01-26
上传用户：2467478207
This Microsoft(R) Macro Assembler Reference lists all MASM instructions, directives, statements, and operators. It also serves as a quick reference to the Programmer’s WorkBench commands, and the commands for Microsoft utilities such as LINK and LIB. This book documents features of MASM version 6.1, and is part of a complete MASM documentation set.
标签： instructions directives statements Microsoft
上传时间： 2016-01-31
上传用户：asddsd
