Hiroaki Nakai

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BACKGROUND We prospectively investigated whether the wound-protective Alexis (Applied Medical, Rancho Santa Margarita, CA) wound retractor was effective in preventing surgical site infection (SSI). METHODS We examined the actual condition of SSI in a 12-month randomized, controlled trial consisting of 221 patients who had undergone nontraumatic(More)
OBJECTIVES The present study aimed to clarify stress distribution in teeth under an external applied load using microindentation and multiscale simulation. METHODS Anisotropic material properties of enamel and dentin were measured using a microindentation method with a dynamic ultra microhardness tester. The numerical model was constructed using the(More)
Accurate estimation of noise and signal power is of fundamental interest in a wide variety of vision applications as it is critical to thresholding and decision processes. This paper proposes two methods for the estimation of nonstationary noise based upon models of image structure which locally separate signal from noise. The resulting algorithms are(More)
In this paper, we describe the Toshiba event detection system for TRECVID surveillance event detection task [1] that detects three TRECVID required events (E05:PersonRuns, E19:ElevatorNoEntry, and E20:OpposingFlow). Our system (" Toshiba_1 p-cohog_1 ") consists of four components: (1) robust change detection based on the combination of pixel intensity(More)
We present a real-time and high-precision face recognition system using an image processing LSI chip:Visconti[Visconti: Multi-VLIW Image Recognition Processor]. The system is compact and operates at low power, making it suitable for many purposes, including home security and robot vision. The LSI includes three media processing modules and peripherals which(More)