We describe the use of a analog VLSI vision sensor for fixation of a 1D image. The sensor, which contains processing circuitry to con-volve the image with a Gabor-type filter, is mounted on a mobile robot. Experimental results indicate that a simple proportional feedback loop using only two outputs of the sensor to command the velocity of the robot can successfully fixate a moving image on the ...

Particle swarm optimization algorithm in solving complex functions, such as slow convergence, accuracy is not high, easily falling into local optimum problem. Based on the chaos optimization is introduced into particle swarm optimization algorithm, given the chaotic particle swarm optimization algorithm. In order to improve the image quality of CMOS image sensor, the image of the main noise sou...

The ultimate purpose of the image sensor is to obtain the clear image, especially the clear image we see. However, the jaggy which appears at the edge of the object in the image, which is composed of some pair of pixels, and it becomes the serious factor to defect the clearness of the image, since our eye severely perceives such jaggy, and it cannot be intrinsically eliminated by increased numb...

to determine the suitable indices for vegetation cover and production assessment based on the remote sensing data, simultaneous digital data with field data belonging to the spring rangeland of the semirom-isfahan province were analyzed. during two years of monitoring the annual, grass, forb, and shrub vegetation cover and the total production data from 86 were collected. the global positioning...

The ability to reproduce a high-quality image depends strongly on the image sensor light sensitivity. This sensitivity depends, in turn, on the materials, the circuitry, and the optical properties of the pixel. We calculate the optical efficiency of a complementary metal oxide semiconductor (CMOS) image sensor pixel by using a geometrical-optics phase-space approach. We compare the theoretical ...

Life time of wireless sensor networks is limited due to battery constraint. In camera equipped sensor nodes, due to battery and processing power constraints, the life time of sensor network is decreased quickly when image is processed and is transferred to the destination. Image compression not only helps to reduce the communication latency in a sensor network but also save the life time of the...

Several research works have been done in recent times utilizing grayscale image for the measurement of many physical phenomena. In this present paper, we have designed an embedded based inclination sensor utilizing the grayscale image with a resolution of 0.3o. The sensor module consists of a circular shaped metal disc, laminated with grayscale image and an optical transreceiver. The sensor pri...

We describe a new pushbroom hyperspectral imaging device that has no macro moving part. The main components of the proposed hyperspectral imager are a digital micromirror device (DMD), a CMOS image sensor with no filter as the spectral sensor, a CMOS color (RGB) image sensor as the auxiliary image sensor, and a diffraction grating. Using the image sensor pair, the device can simultaneously capt...

We present a virtual digital camera sensor, whose aim is to simulate a real (physical) image capturing sensor. To accomplish this task, the virtual sensor operates in two steps. First, it accepts a physical description of a given scene and simulates the entire process of photon sensing and charge generation in the sensor device. This process is affected by noise, mostly photon noise. Second, it...