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Sensors 2010, 10(10), 9232-9251; doi:10.3390/s101009232

An Intelligent Architecture Based on Field Programmable Gate Arrays Designed to Detect Moving Objects by Using Principal Component Analysis

Electronics Department, University Alcala, Escuela Politecnica, Campus Universitario, Ctra. Madrid Barcelona km. 33.6 28871, Alcala de Henares, Madrid, Spain
Author to whom correspondence should be addressed.
Received: 2 September 2010 / Revised: 1 October 2010 / Accepted: 10 October 2010 / Published: 15 October 2010
(This article belongs to the Special Issue 10 Years Sensors - A Decade of Publishing)
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This paper presents a complete implementation of the Principal Component Analysis (PCA) algorithm in Field Programmable Gate Array (FPGA) devices applied to high rate background segmentation of images. The classical sequential execution of different parts of the PCA algorithm has been parallelized. This parallelization has led to the specific development and implementation in hardware of the different stages of PCA, such as computation of the correlation matrix, matrix diagonalization using the Jacobi method and subspace projections of images. On the application side, the paper presents a motion detection algorithm, also entirely implemented on the FPGA, and based on the developed PCA core. This consists of dynamically thresholding the differences between the input image and the one obtained by expressing the input image using the PCA linear subspace previously obtained as a background model. The proposal achieves a high ratio of processed images (up to 120 frames per second) and high quality segmentation results, with a completely embedded and reliable hardware architecture based on commercial CMOS sensors and FPGA devices. View Full-Text
Keywords: FPGA; PCA; CMOS sensor; object detection; image processing FPGA; PCA; CMOS sensor; object detection; image processing

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Bravo, I.; Mazo, M.; Lázaro, J.L.; Gardel, A.; Jiménez, P.; Pizarro, D. An Intelligent Architecture Based on Field Programmable Gate Arrays Designed to Detect Moving Objects by Using Principal Component Analysis. Sensors 2010, 10, 9232-9251.

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