468 research outputs found
ADAPTABLE FINGERPRINT MINUTIAE EXTRACTION ALGORITHM BASED-ON CROSSING NUMBER METHOD FOR HARDWARE IMPLEMENTATION USING FPGA DEVICE
In this article. a main perspective of developing and implementing fingerprint extraction and matching
algorithms as a pari of fingerprint recognition system is focused. First, developing a simple algorithm to
extract fingerprint features and test this algorithm on Pc. The second thing is implementing this algorithm
into FPGA devices. The major research topics on which the proposed approach is developing and
modifying fingerprint extraction feature algorithm. This development and modification are using crossing
number method on pixel representation value '0'. In this new proposed algorithm, it is no need a process
concerning ROI segmentation and no trigonometry calculation. And specially in obtaining their parameters
using Angle Calculation Block avoiding floating points calculation. As this method is local feature that
usually involve with 60-100 minutiae points, makes the template is small in size. Providing FAR. FRR and
EER, performs the performance evaluation of proposed algorithm. The result is an adaptable fingerprint
minutiae extraction algorithm into hardware implementation with 14.05 % of EEl?, better than reference
algorithm, which is 20.39 % . The computational time is 18 seconds less than a similar method, which takes
60-90 seconds just for pre-processing step. The first step of algorithm implementation in hardware
environment (embedded) using FPGA Device by developing IP Core without using any soft processor is
presented
Digital implementation of the cellular sensor-computers
Two different kinds of cellular sensor-processor architectures are used nowadays in various
applications. The first is the traditional sensor-processor architecture, where the sensor and the
processor arrays are mapped into each other. The second is the foveal architecture, in which a
small active fovea is navigating in a large sensor array. This second architecture is introduced
and compared here. Both of these architectures can be implemented with analog and digital
processor arrays. The efficiency of the different implementation types, depending on the used
CMOS technology, is analyzed. It turned out, that the finer the technology is, the better to use
digital implementation rather than analog
Biblioteca de procesamiento de imágenes optimizada para Arm Cortex-M7
La mayoría de los vehículos en la actualidad están equipados con sistemas que asisten al conductor en tareas difíciles y repetitivas, como reducir la velocidad del vehículo en una zona escolar. Algunos de estos sistemas requieren una computadora a bordo capaz de realizar el procesamiento en tiempo real de las imágenes del camino obtenidas por una cámara. El objetivo de este proyecto es implementar una librería de procesamiento de imagen optimizada para la arquitectura ARM® Cortex®-M7. Esta librería provee rutinas para realizar filtrado espacial, resta, binarización y extracción de la información direccional de una imagen, así como el reconocimiento parametrizado de patrones de una figura predefinida utilizando la Transformada Generalizada de Hough. Estas rutinas están escritas en el lenguaje de programación C, para aprovechar las optimizaciones del compilador GNU ARM C, y obtener el máximo desempeño y el mínimo tamaño de objetos. El desempeño de las rutinas fue comparado con la implementación existente para otro microcontrolador, el Freescale® MPC5561. Para probar la funcionalidad de esta librería en una aplicación de tiempo real, se desarrolló un sistema de reconocimiento de señales de tráfico. Los resultados muestran que en promedio el tiempo de ejecución es 18% más rápido y el tamaño de objetos es 25% menor que en la implementación de referencia, lo que habilita a este sistema para procesar hasta 24 cuadros por segundo. En conclusión, estos resultados demuestran la funcionalidad de la librería de procesamiento de imágenes en sistemas de tiempo real.Most modern vehicles are equipped with systems that assist the driver by automating difficult and repetitive tasks, such as reducing the vehicle speed in a school zone. Some of these systems require an onboard computer capable of performing real-time processing of the road images captured by a camera. The goal of this project is to implement an optimized image processing library for the ARM® Cortex®-M7 architecture. This library includes the routines to perform image spatial filtering, subtraction, binarization, and extraction of the directional information along with the parameterized pattern recognition of a predefined template using the Generalized Hough Transform (GHT). These routines are written in the C programming language, leveraging GNU ARM C compiler optimizations to obtain maximum performance and minimum object size. The performance of the routines was benchmarked with an existing implementation for a different microcontroller, the Freescale® MPC5561. To prove the usability of this library in a real-time application, a Traffic Sign Recognition (TSR) system was implemented. The results show that in average the execution time is 18% faster and the binary object size is 25% smaller than in the reference implementation, enabling the TSR application to process up to 24 fps. In conclusion, these results demonstrate that the image processing library implemented in this project is suitable for real-time applications.ITESO, A. C.Consejo Nacional de Ciencia y TecnologíaContinental Automotiv
An Embedded Biometric Sensor for Ubiquitous Authentication
Communication networks and distributed technologies
move people towards the era of ubiquitous computing. An
ubiquitous environment needs many authentication sensors for
users recognition, in order to provide a secure infrastructure for
both user access to resources and services and information
management. Today the security requirements must ensure
secure and trusted user information to protect sensitive data
resource access and they could be used for user traceability inside
the platform. Conventional authentication systems, based on
username and password, are in crisis since they are not able to
guarantee a suitable security level for several applications.
Biometric authentication systems represent a valid alternative to
the conventional authentication systems providing a flexible einfrastructure
towards an integrated solution supporting the
requirement for improved inter-organizational functionality. In
this work the study and the implementation of a fingerprintsbased
embedded biometric system is proposed. Typical strategies
implemented in Identity Management Systems could be useful to
protect biometric information. The proposed sensor can be seen
as a self-contained sensor: it performs the all elaboration steps on
board, a necessary requisite to strengthen security, so that
sensible data are securely managed and stored inside the sensor,
without any data leaking out. The sensor has been prototyped via
an FPGA-based platform achieving fast execution time and a
good final throughput. Resources used, elaboration times of the
sensor are reported. Finally, recognition rates of the proposed
embedded biometric sensor have been evaluated considering
three different databases: the FVC2002 reference database, the
CSAI/Biometrika proprietary database, and the CSAI/Secugen
proprietary database. The best achieved FAR and FRR indexes
are respectively 1.07% and 8.33%, with an elaboration time of
183.32 ms and a working frequency of 22.5 MHz
A Multimodal Technique for an Embedded Fingerprint Recognizer in Mobile Payment Systems
The development and the diffusion of distributed systems, directly connected to recent communication technologies, move people towards the era of mobile and ubiquitous systems. Distributed systems make merchant-customer relationships closer and more flexible, using reliable e-commerce technologies. These systems and environments need many distributed access points, for the creation and management of secure identities and for the secure recognition of users. Traditionally, these access points can be made possible by a software system with a main central server. This work proposes the study and implementation of a multimodal technique, based on biometric information, for identity management and personal ubiquitous authentication. The multimodal technique uses both fingerprint micro features (minutiae) and fingerprint macro features (singularity points) for robust user authentication. To strengthen the security level of electronic payment systems, an embedded hardware prototype has been also created: acting as self-contained sensors, it performs the entire authentication process on the same device, so that all critical information (e.g. biometric data, account transactions and cryptographic keys), are managed and stored inside the sensor, without any data transmission. The sensor has been prototyped using the Celoxica RC203E board, achieving fast execution time, low working frequency, and good recognition performance
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