Intelligent surveillance systems have been studied by many researchers. These systems should be operated in both daytime and nighttime, but objects are invisible in images captured by visible light camera during the night. Therefore, near infrared (NIR) cameras, thermal cameras (based on medium-wavelength infrared (MWIR), and long-wavelength infrared (LWIR) light) have been considered for usage...

Burst mode SAR’s such as ScanSAR or TOPSAR can achieve wide swath coverage in a single pass of the satellite at the cost of degraded cross-range resolution. In the bistatic configuration using a SAR satellite as illuminator of opportunity and a ground-based stationary receiver close to the imaged area, this coarse cross-range resolution can be improved in some favourable geometries by exploitin...

Finding the accurate position of an eye is crucial for mobile iris recognition system in order to extract the iris region quickly and correctly. Unfortunately, this is very difficult to accomplish when a person is wearing eyeglasses because of the interference from the eyeglasses. This paper proposes an eye detection method that is robust to eyeglass interference in mobile environment. The prop...

Inspired by recent technical advances in near-space defined as the space region between 20km and 100km, which is above the storms and jet stream, and not constrained by the orbital mechanics of the satellite platforms or the high fuel consumptions of the airborne platforms, they can stay at a specific site almost indefinitely to provide a persistent coverage, this paper proposed the system conc...

We describe a reciprocal-lattice vector method for analysis of the diffractive self-imaging (or Talbot effect) of a two-dimensional periodic object. Using this method we analyze the fractional Talbot effect of a hexagonal array and deduce a simple analytical expression for calculation of the complex amplitude distribution at any fractional Talbot plane. Based on this new formula, we design a he...

A new iris recognition method for mobile phones based on corneal specular reflections (SRs) is discussed. We present the following three novelties over previous research. First, in case of user with glasses, many noncorneal SRs may happen on the surface of glasses and it is very difficult to detect genuine SR on the cornea. To overcome such problems, we propose a successive on/off dual illumina...

Total internal reflection fluorescence (TIRF) microscopy is a high-contrast imaging technique suitable for observing biological events that occur on or near the cell membrane. The improved contrast is accomplished by restricting the thickness of the excitation field to over an order of a magnitude narrower than the z-resolution of an epi-fluorescence microscope. This technique also increases si...

Objective: To investigate possible factors that could cause air bubbles at the tip of an endolaser probe and to describe a technique to remove air bubbles during microincision vitrectomy surgery (MIVS). Methods: Thirty patients (30 eyes) had 23-gauge MIVS, and endolaser photocoagulation with an endolaser probe was performed to complete panretinal photocoagulation. The primary outcome measure wa...

In this article, we review and compare different methods for the localization of an illuminator opportunity passive radar systems employing cooperative targets. For assessment comparison, use numerical simulations real-world measurements. To achieve reliable operation under conditions, a correct robust association bistatic target observations with ground truth information is necessary. We intro...

Measles and canine distemper viruses were grown together in a Vero monkey kidney cell line. Each virus could be identified and individually titrated by using the color contrast produced by the reddish tetra-methyl rhodamine isothiocyanate-tagged antimeasles conjugate and the green fluorescein isothiocyanate-tagged antidistemper conjugate. Both blue light and green light were used for the excita...