Search results for "COD"

The role of perceptual contrast non-linearities in image transform quantization

2000

Abstract The conventional quantizer design based on average error minimization over a training set does not guarantee a good subjective behavior on individual images even if perceptual metrics are used. In this work a novel criterion for transform coder design is analyzed in depth. Its aim is to bound the perceptual distortion in each individual quantization according to a non-linear model of early human vision. A common comparison framework is presented to describe the qualitative behavior of the optimal quantizers under the proposed criterion and the conventional rate-distortion based criterion. Several underlying metrics, with and without perceptual non-linearities, are used with both cr…

Super resolving optical system based on spectral dilation

2004

Time multiplexing is a common approach for achieving super resolution. The basic method involves moving two grating one is in front of the object and the other one in front of the camera. In this paper, we present a novel approach for obtaining super resolution not by shifting a grating, but by using its various dilations for obtaining the required encoding and decoding of information.

Low Complexity Image Compression using Pruned 8-point DCT Approximation in Wireless Visual Sensor Networks

2017

International audience; Since the transmission of the uncompressed image in the context of wireless visual sensor networks (WVSNs) consumes less energy than transmitting the compressed image, developing energy-aware compression algorithms are mandatory to extend the camera node's lifetime and thereby the whole network lifetime. The present paper studies a low-complexity image compression algorithm in the context of WVSNs. This algorithm consists of applying a pruning approach on a DCT approximation transform. The scheme is investigated in terms of computation cycles, processing time, energy consumption and image quality. Experimental works are conducted using the Atmel Atmega128 processor o…

Temperature and emissivity separation from calibrated data of the Digital Airborne Imaging Spectrometer

2001

Abstract The Digital Airborne Imaging Spectrometer (DAIS), with six thermal infrared channels in the 8–14 μm window, was flown over the Barrax test site, Spain, in the framework of the DAIS Experiment in the summer of 1998. Atmospheric correction of the DAIS thermal channels was performed by means of local radiosonde measurements and a radiative transfer model. Ground measurements of temperature and emissivity for six selected spots (two bare soils, two water bodies, and two vegetated fields) were conducted with the objective of providing calibration and validation targets. Three targets were used for a linear ground calibration of the DAIS thermal channels. With the ground-calibrated image…

STATO DI SALUTE DEGLI IMMIGRATI AFRICANI APPRODATI SULLE COSTE ITALIANE

2014

PERANAN TUMBUHAN OBAT DALAM BUDAYA ANAK SUKU MOILE DI MOKWAM MANOKWARI

2010

<p><em>The objective </em><em>of the research </em><em>was to determine the role of medicinal plants in the </em><em>livelyhood </em><em>of children in </em><em>the sub-</em><em>tribe</em><em> </em><em>Moile. The study was conducted in the area </em><em>of </em><em>Mokwam in July 2008. Analysis of Index of Cultural Significance (ICS) is used to measure the role of medicinal plants in </em><em>the culture of the sub-</em><em>trib</em><em>e</em><em> Moile. The results </em><em>showed </em><em&gt…

An Efficient Hardware implementation of MQ Decoder of JPEG2000

2014

International audience; JPEG2000 is an international standard for still images intended to overcome the shortcomings of the existing JPEG standard. Compared to JPEG image compression techniques, JPEG2000 standard has not only better not only has better compression ratios, but it also offers some exciting features. As it's hard to meet the real-time requirement of image compression systems by software, it is necessary to implement compression system by hardware. The MQ decoder of the JPEG2000 standard is an important bottleneck for real-time applications. In order to meet the real-time requirement we propose in this paper a novel architecture for a MQ decoder with high throughput which is co…

La scoperta di un paradigma complesso. L'«Unternehmen» nel diritto commerciale e nella dottrina austro-tedesca del primo Novecento

2010

Dai primi anni del Novecento, senza una precisa definizione legislativa, senza un tessuto normativo coerente ed univoco, la scienza giuridica austro-tedesca ripensò in profondità la nuova realtà economico-sociale dell’Europa industriale, scoprendo e giuridicamente rappresentando, in tempo di «individualismo atomizzante», la dimensione collettiva ed organizzativa del fenomeno imprenditoriale. Il diritto patrimoniale, fino ad allora terreno privilegiato della proprietà, si impregnava di diritto dell’economia, con al centro l’«Unternehmen», quale paradigma collettivo e complesso che, secondo il messaggio divulgato da Ohmeyer, Pisko, Müller-Erzbach, Isay, Geller, ripudiava ogni chiave di lettur…

Deciphering the Nonsense Readthrough Mechanism of Action of Ataluren: An in Silico Compared Study

2019

Ataluren was reported to suppress nonsense mutations by promoting the readthrough of premature stop codons, although its mechanism of action (MOA) is still debated. The likely interaction of Ataluren with CFTR-mRNA has been previously studied by molecular dynamics. In this work we extended the modeling of Ataluren's MOA by complementary computational approaches such as induced fit docking (IFD), quantum polarized ligand docking (QPLD), MM-GBSA free-energy calculations, and computational mutagenesis. In addition to CFTR-mRNA, this study considered other model targets implicated in the translation process, such as eukaryotic rRNA 18S, prokaryotic rRNA 16S, and eukaryotic Release Factor 1 (eRF…

Influence of different approaches to the cerebellopontine angle on the function of the intermediate nerve

2007

Object Surgery in the cerebellopontine angle (CPA) is a standard procedure at many centers. Outcome is focused mainly on preservation of hearing and facial function postoperatively. The nonmotor part of the facial nerve, the intermediate nerve, is nearly neglected nowadays. Methods A retrospective study was designed, including a questionnaire that was sent to 178 patients who had undergone surgery between 2000 and 2004. Data were obtained in 156 cases. The questionnaire was divided into five parts assessing the presence of increased tearing, reduced tearing, salivation disturbances, increased nasal secretions, and abnormalities in taste. Finally, a self-assessment of patient symptoms was a…