Sookwang Ro

Soft computing techniques in network packet video

A new approach to low-bandwidth network packet video quality maximization has been proposed, based on software agent and global optimization algorithm, including: environmental factors (noise, multi-path fading); compression ratio; bit-error-correction; maximum available bandwidth; video format; and encryption. This is important for 2G-wireless RF cellular GSM visual communication, and other low-bandwidth homeland security visibility, and civilian RF WLANs.

Catastrophic extraction of anomalous events

In this paper we discuss extraction of anomalous events based on the theory of catastrophes, a mathematical theory of continuous geometrical manifolds with discrete singularities called catastrophes. Intelligence exploitation systems and technologies include such novel data mining techniques as automatic extraction of discrete anomalous events by software algorithms based on the theory of catastrophes, that can reduce complex problems to a few essential so-called state variables. This paper discusses mostly corank-1 catastrophes with only one state variable, for simplicity. As an example we discuss mostly avionics platforms and catastrophic failures that can be recorded by flight instruments.

Visual sensor network based on streaming video and IP-transparency

A new type of wireless sensor network is discussed for the digital battlefield and network-centric warfare. This network is rapidly deployable, and has unique features specifically suited to imaging sensors (visible, IR, imaging radar, low-light) and wireless local area network applications.

Soft computing and hyperspectral video for background extraction

This paper presents experimental results of hyperspectral image compression by means of soft computing. Compressions and transmission of hyperspectral data requires intensive computation and sophisticated processing that have been incompatible with on-board real-time operation. Soft computing with intelligent processing optimizes the compression parameters of MPEG 1, tuning them to the specific video content to deliver the highest hyperspectral video compression quality. This soft computing approach is compared with compression based on wavelet transform.

Optical packet header processing based on joint transform correlator

This paper describes all-optical packet header processing by content-addressable memory and optical joint transform correlation. The results of proof-of-principle computer simulation and experiment are presented.

Soft computing, advanced video/imaging processing, and communications

The progress in soft computing and soft communication (SC2) is reviewed in detail including video/imaging compression, communications, processing, sensing and networking, based on 8 B0PS distributed hardware, allowing for full video frame evaluation, in real time.

Mathematical treatment of aircraft maneuvers

This work addresses the problem faced by an aircraft that is off its nominal flight path. The goal is to find the optimal trajectory to safely and efficiently return the aircraft to its proper path in rugged terrain. The authors approach to this problem is to consider the space of possible trajectories as a series of linked maneuvers, so that a particular trajectory can be described by the ordered list of parameters specifying the maneuvers. A penalty function is minimized with respect to variations of the maneuver parameter list. The work considered trajectories of up to three straight flight segments linked by turns. The penalty function includes terms penalizing elapsed time for the measure, distance climbed, and closest approach to the ground as well as distance from the nominal flight path at the end of the maneuver. Minimization is performed by means of an adaptive fuzzy-logic-enhanced genetic algorithm.