This paper presents a single-bit CMOS image sensor (CIS) that uses a data processing technique with an edge detection block for simple iris segmentation. In order to recognize the iris image, the image sensor conventionally captures high-resolution image data in digital code, extracts the iris data, and then compares it with a reference image through a recognition algorithm. However, in this ca...

The objective of this paper is to build a map using a quadrocopter. To explore the surroundings and build a map, ultrasonic sensors and a camera sensor are used. As ultrasonic and camera sensors get information separately, they have to be synchronized. Through this synchronization, the location of the quadrocopter can be recognized. At that point, the four horizontal distances can be calculated...

The advantages of precision agriculture in the vegetable growing and high value crop sector may accrue to horticulturists especially with respect to meet quality standards and to carry out selective and subsequent harvesting. However, the implementation and use of site-specific sensor technologies has never been adopted for horticultural purposes in the context of nitrogen fertilization suffici...

Cloud and Aerosol Imager (CAI) onboard the Greenhouse Gases Observing Satellite (GOSAT) is a multi-band sensor designed to observe and acquire information on clouds and aerosols. In order to retrieve aerosol optical depth (AOD) over land from the CAI sensor, a Dark Target (DT) algorithm for GOSAT CAI was developed based on the strategy of the Moderate Resolution Imaging Spectroradiometer (MODIS...

Here we report the sensing properties of the aqueous solution of mesotetra(N-methyl-4-pyridyl)porphine tetrachloride (1) for simultaneous detection of toxic metal ions by using UV-vis spectroscopy. Cationic porphyrin 1 displayed different electronic absorptions in UV-vis region upon interacting with Hg2+, Pb2+, Cd2+, and Cu2+ ions in neutral water solution at room temperature. Quite interesting...

In this paper, we deal with the problem of sensor performance estimation. As we assume that the sensor is described with only few data, we decide to use the theory of belief functions to represent the inherent uncertainty of our information. Hence, we introduce the belief functions framework, especially in the continuous approach. We describe the model of sensor adopted in our study. Knowing th...

The color reproduction of an image sensor is one of the important characteristics which determine the performance of the image sensor. Recently, the pixel size of image sensor has become smaller due to the demand of large pixel count. So, small F-number lens is needed to improve the sensitivity. However, the crosstalk component of spectral sensitivity characteristics increases due to using the ...

digital cameras, hyperspectral, multispectral, sensors, simulation, modelling, calibration This paper describes (a) models for digital cameras, (b) the calibration of the spectral response of a camera and (c) the performance of an image capture simulator. The general model underlying the simulator assumes that the image capture device contains multiple classes of sensors with different spectral...