A texture-based architecture for face detection in IR images on an FPGA

Marcelo Vergara; Alejandro Wolf; Miguel Figueroa

doi:10.1117/12.2067552

7 October 2014 A texture-based architecture for face detection in IR images on an FPGA

Marcelo Vergara, Alejandro Wolf, Miguel Figueroa

Proceedings Volume 9249, Electro-Optical and Infrared Systems: Technology and Applications XI; 92490L (2014) https://doi.org/10.1117/12.2067552
Event: SPIE Security + Defence, 2014, Amsterdam, Netherlands

Abstract

This paper presents a digital architecture for face detection on infrared (IR) images. We use Local Binary Patterns (LBP) to build a feature vector for each pixel, which represents the texture of the image in a vicinity of that pixel. We use a Support Vector Machine (SVM), trained with 306 images of 51 different subjects, to recognize human face textures. Finally, we group the classified pixels into rectangular boxes enclosing the faces using an algorithm for connected components. These boxes can then be used to track, count, or identify faces in a scene, for example. We implemented our architecture on a Xilinx XC6SLX45 FPGA and tested it on 306 IR images of 51 subjects, different from the data used to train the SVM. The circuit correctly identifies 100% of the faces in the images, and reports 4.5% of false positives. We also tested the system on a set of IR video streams featuring multiple faces per image, with varied poses and backgrounds, and obtained a hit rate of 94.5%, with 7.2% false positives. The circuit uses less than 25% of the logic resources available on the FPGA, and can process 313 640x480-pixel images per second with a 100MHz clock, while consuming 266mW of power.

Citation Download Citation

Marcelo Vergara, Alejandro Wolf, and Miguel Figueroa "A texture-based architecture for face detection in IR images on an FPGA", Proc. SPIE 9249, Electro-Optical and Infrared Systems: Technology and Applications XI, 92490L (7 October 2014); https://doi.org/10.1117/12.2067552

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Facial recognition systems

Infrared imaging

Field programmable gate arrays

Detection and tracking algorithms

Infrared cameras

Infrared detectors

Video

Show All Keywords

Keywords/Phrases

Search In:

Publication Years