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A bi-dimensional filter for high accuracy image processing is implemented by using a novel partitioning method. The method is based on a number theory theorem, which permits to reduce the complexity of the operation to that of an adder chain and also the amount of the coefficients stored in memory, improving the memory organization. To show the advantage of such method, we implemented a Floating Point...
We design a multilevel data encoder for digital communication systems. Time constraints are imposed for a lot of services provided on portable devices. Hardware solutions are preferred more than software algorithms when the processing time and the power consumption are critical. Powerful error-correction coders processing multi-bit symbols can be implemented as hardware solutions in order to reduce...
A procedure for laboratory rats tracking using image and video processing techniques is proposed. A plastic box split into three chambers by two walls is the analyzed scene. Each experiment starts with a sequence during at least eight minutes with a free rat placed in the middle area with the closed doors to the box marginal locations. The proposed method determines for each sequence frame the location...
Because of the nature of vehicular communications, security is a crucial aspect, involving the continuous development and analysis of the existing security architectures and punctual theoretical and practical aspects that have been proposed and are in need of continuous updates and integrations with newer technologies. But before an update, a good knowledge of the current aspects is mandatory. Identifying...
This paper deals with the removal of periodic noise patterns in microscopy images. The proposed method analyzes, determines and corrects the magnitude spectrum components. The denoising in frequency domain is known to be a better solution for preserving the fine details. Experimental results are provided.
In this paper a new pupil detection algorithm based on RANSAC procedure is presented. Unlike other similar algorithms reported in the literature, the proposed algorithm provides higher accuracy, low running time and operates properly in noise conditions and for variable illumination. This algorithm is used in the field of assistive technology in order to communicate with neuromotor disabled people...
In optimization problems, nature inspired algorithms are able to generate near optimal solutions faster than other optimization algorithms. Based on nature intelligence, these algorithms are preferable especially when the function to be optimized is computationally intensive. In this paper it is proposed an image registration procedure based on the Artificial Bee Colony algorithm. First, its performances...
Visual saliency is the property of a scene to draw the attention of different people to the same objects within it. Its investigation and development enabled many practical applications. In this paper we aim to use it for the study of visual art. As a first contribution we introduce an extensive database annotated in terms of visual saliency by considering data acquired from many users. Secondly,...
This paper is an up-to-date short overview of the QoS for Satellite IP networks. Some definitions, parameters and requirements for QoS are given. IP QoS Architectures are presented and various contributions to end-to-end QoS at each layer are included. DVB-RCS and evolution to standard DVB-S2 - RCS to support emerging Internet services via satellite is also briefly approached. Possible integration...
This paper covers the design and testing of an operational amplifier (opamp) used in a high temperature signal conditioning unit for integration with temperature and strain gauge sensors. The opamp was designed and fabricated in a 1 µm CMOS Silicon-on-Insulator (SOI) process and has been characterized up to 300°C. The measurement results at 200°C are showing a DC open-loop gain of 100dB, an offset...
In this paper we approach the problem of scene recognition in paintings. We tackle this task with the aid of Convolutional Neural Networks and a large database consisting of around 80,000 paintings. The main purpose is to identify an efficient method to enlarge the database by domain transfer from photographic content to artistic content. Thus, we discuss the practical capabilities of a recent method...
An architecture capable of performing the inverse Tone Mapping to convert a Low Dynamic Range image into a High Dynamic Range one is proposed. The proposed image processor is specifically designed for a Field Programmable Gate Array implementation. The design exploits the presence of specific blocks in the Field Programmable Logic board, dedicated to the implementation of memories, in order to develop...
The convergence analysis of the affine projection algorithm (APA) was intensively studied, however, it is far to be a trivial task. In this context, a set of assumptions have to be considered, in order to allow a tractable analytical approach. As a consequence, notable differences occur between the simulation results and the analytical model. In this paper, the convergence of APA is studied and a...
This work presents the use of digital watermarking for applications of automated pigmented skin lesions assessment. Automated skin lesion assessment by digital image processing of macroscopic pigmented skin lesion (MPLS) images uses lesion characteristics for malignant risk computation. The accuracy of the computed risk level is increased when additional information is taken into consideration: age,...
FPGAs are becoming an attractive platform for accelerating many computations including scientific applications. These applications demand high performance and high precision arithmetic. Decomposition of a matrix into lower and upper triangular matrices (LU decomposition) is a vital part of many scientific and engineering applications. This paper evaluates the accuracy of a fixed-point LU decomposition...
This paper presents a 10-Gb/s power-efficient serial-link transceiver for the Internet-of-Everything applications. The proposed transceiver employs several techniques to reduce the power consumption. This includes the use of forward clocking with a simplified clock recovery scheme, multiplexing the transmitted signal at the output of voltage-mode drivers, and using modified slicers in the receiver...
We investigate the performances of fixed point implementation recursive approximations of Gabor filters in a texture classification framework based on a bag of words approach. The obtained results indicate that it is possible to obtain similar performances as in the case of using “premium” but very costly feature extractors.
A detailed analysis of the nonideal behavior of a cross-coupled CMOS transistor pair used to implement negative resistances and capacitors is presented. Improvement solutions are given as well.
The classical stereophonic acoustic echo cancellation (SAEC) scheme requires the identification of four echo paths using the same number of adaptive algorithms. The SAEC setup can be reinterpreted by employing the widely linear (WL) model, which recasts the two-input/two-output system with real random variables as a single-input/single-output system with complex random variables. The WL model improves...
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