Results 41 to 50 of about 1,349,860 (222)

FROM IMAGE CONTOURS TO PIXELS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
This paper relates to the reconstruction of digital images using their contour representations. The process involves determining the pixel intensity value which would exist at the intersections of a regular grid using the nodes of randomly spaced ...
G. Scarmana
doaj   +1 more source

A New Concept for Kilotonne Scale Liquid Argon Time Projection Chambers

open access: yesInstruments, 2020
We develop a novel Time Projection Chamber (TPC) concept suitable for deployment in kilotonne-scale detectors, with a charge-readout system free from reconstruction ambiguities, and a robust TPC design that reduces high-voltage risks while increasing the
Jonathan Asaadi   +27 more
doaj   +1 more source

A Fast Star-Detection Algorithm under Stray-Light Interference

open access: yesPhotonics, 2023
The interference caused by stray light leads to the invalid attitude of star sensors in orbit, thus affecting the attitude control of satellites. In order to overcome this problem, this paper proposes a fast star-detection algorithm with strong stray ...
Kaili Lu   +5 more
doaj   +1 more source

Surface projection for mixed pixel restoration [PDF]

open access: yes, 2009
Amplitude modulated full-field range-imagers are measurement devices that determine the range to an object simultaneously for each pixel in the scene, but due to the nature of this operation, they commonly suffer from the significant problem of mixed ...
Cree, Michael J.   +3 more
core   +2 more sources

Determination of optimal formats for digital image compression

open access: yesIngenius: Revista de Ciencia y Tecnología
Se concluye que independientemente de la herramienta que se utilice, es el formato de la imagen lo que influye en el tamaño final.& The objective was to determine the influence of different image formats and tools used for compression on the final ...
Abimael Adam Francisco Paredes   +3 more
doaj   +1 more source

Analysis of code levelling rods calibration accuracy applying covariance functions

open access: yesGeodesy and Cartography, 2012
An analysis of code levelling rods calibration accuracy applying covariance functions theory is presented. Images of the coded rods are treated by the Matlab 7 computer program.
Jonas Skeivalas   +3 more
doaj   +1 more source

Relevance of two manual tumour volume estimation methods for diffuse low-grade gliomas

open access: yesHealthcare Technology Letters, 2018
Management of diffuse low-grade glioma (DLGG) relies extensively on tumour volume estimation from MRI datasets. Two methods are currently clinically used to define this volume: the commonly used three-diameters solution and the more rarely used software ...
Meriem Ben Abdallah   +5 more
doaj   +1 more source

Diffractive optics approach towards subwavelength pixels

open access: yes, 2018
Pixel size in cameras and other refractive imaging devices is typically limited by the free-space diffraction. However, a vast majority of semiconductor-based detectors are based on materials with substantially high refractive index.
Fan, Bo   +2 more
core   +1 more source

Sun Sensor Based on a Luminance Spiking Pixel Array [PDF]

open access: yes, 2017
We present a novel sun sensor concept. It is the very first sun sensor built with an address event representation spiking pixel matrix. Its pixels spike with a frequency proportional to illumination.
Carmona Galán, Ricardo   +4 more
core   +1 more source

Accuracy research on coded levelling staff using digital photos

open access: yesGeodesy and Cartography, 2012
The article introduces accuracy research on coded levelling staff using digital photos. The principles of photogrammetry can be used for comparing the views of the etalon and meter to be calibrated.
Vladislovas Česlovas Aksamitauskas   +1 more
doaj   +1 more source

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