Chih-Yung Chen

Learn More
With the rapid development of digital still camera (DSC) technology, auto-focus has become an important function and widely used in many mobile devices such as cellular phone, notebook, and personal digital assistance (PDA). The picture taken by a camera without auto-focus function could be incorrect and blurred. Generally, the high-level DSC must have the(More)
This paper presents an indoor positioning technique based on neural networks (NN). The received signal strengths (RSS) sensed by Zigbee wireless sensor network were used to estimate the position of object. From the simulation results shown, the NN technique proposed still has the high accuracy even the signal strengths sensed are unstable. Besides, from the(More)
A new smart building evacuation system consisting of intelligent integration supervisory system (IISS), smart emergency indicator boards (SEIB) and fuzzy-based approach for evacuation modeling is presented. In an emergency, the IWSS can obtain the positions of disaster area from wireless sensors. Then, the system determinates safe evacuation routes using a(More)
This paper presents an indoor positioning technique using a modified probabilistic neural network (MPNN) scheme. It measures the received signal strength (RSS) between an object and stations, and then transforms the RSS into distances. A MPNN engine determines coordinate of the object with the input distances. The experiments are conducted in a realistic(More)
Multiprocessor system is made up of two or more main processing elements with similar capabilities running under a single operation system, and the processing elements communicate and cooperate with each other when data or control dependency. We discuss how to implement an affective multiple buses arbiter for the multiprocessor system. The arbitration of(More)
The combination of two face feature extraction methods for face recognition is proposed. The proposed approach treats the face recognition problem as a one-dimensional (1-D) problem rather than two-dimensional (2-D) geometry. The horizontal projection and the statistical distribution of facial gray image are adopted respectively as 1-D energy signal(More)