The Viola-Jones algorithm performance enhancement for a person's face recognition task in the long-wave infrared radiation range

A study was carried out to examine the effect of posture (standing or lying) on the radiation heat load which would be experienced by a kangaroo resting under a small desert tree during a summer day. Measurements were made to assess the temperature and radiation characteristics in three situations judged to be equivalent to the following: (1) a kangaroo standing in the sun in open country; (2) an animal standing in the shade of a small tree; (3) an animal lying in the same shade. The overall pattern of results was shown by the effective radiation temperature measurements made at midday: 78.3, 57.6, and 52.5C for positions (I), (2), and (3) respectively. The relative contributions of solar and long-wave infrared radiation to the pattern of results are discussed.

Download Full-text

Reduced isothermal feature set for long wave infrared (LWIR) face recognition

Infrared Physics & Technology ◽

10.1016/j.infrared.2017.04.019 ◽

2017 ◽

Vol 83 ◽

pp. 114-123 ◽

Cited By ~ 2

Author(s):

Ramiro Donoso ◽

Cesar San Martín ◽

Gabriel Hermosilla

Keyword(s):

Face Recognition ◽

Long Wave ◽

Long Wave Infrared

Download Full-text

Infrared Reflective Coatings for Window Glazing

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.144.226 ◽

2008 ◽

Vol 144 ◽

pp. 226-231 ◽

Cited By ~ 1

Author(s):

Jitka Mohelníková

Keyword(s):

Thin Film ◽

Thin Films ◽

Infrared Radiation ◽

Spectral Characteristics ◽

Heat Losses ◽

Glass Pane ◽

Thin Film Coatings ◽

Long Wave ◽

Reflective Coatings ◽

Long Wave Infrared

Glasses reflective in the spectral range of long-wave infrared radiation operate as heat mirrors. These glasses have found wide applications in architecture. Special thin film coatings on glass panes reflect long wave infrared radiation back to building interiors. The reflective thin films limit absorption of infrared radiation within the glass pane and reduce radiation heat losses of glazings. Heat losses of windows could be significantly limited with the coated glasses which are called low-emissivity glazings. The study of materials convenient for infrared reflective coatings, the optimal composition of thin films and their thicknesses is the main topic of the presented paper. The study is based on measurements of spectral characteristics of selected glasses and computer simulations of the thin film composition for applications of window infrared reflective coatings.

Download Full-text

Impact of Background Radiation on the Long Wave Infrared Radiation Characteristics of Aircraft at High Altitude

Defence Science Journal ◽

10.14429/dsj.66.8090 ◽

2016 ◽

Vol 66 (1) ◽

pp. 51 ◽

Cited By ~ 2

Author(s):

Wei Huang ◽

Hong-hu Ji

Keyword(s):

Infrared Radiation ◽

Horizontal Plane ◽

Background Radiation ◽

Reverse Monte Carlo ◽

Radiance Temperature ◽

Radiation Characteristics ◽

Long Wave ◽

The Impact ◽

Long Wave Infrared ◽

Tracing Method

Reflected background infrared radiation is an important contributor to the aircraft total infrared radiation. A reverse Monte Carlo ray tracing method to compute the infrared radiation signature of aircraft was introduced. The impact of atmospheric and ground radiation on the long wave infrared radiation signature of aircraft at the altitude of 11 km is analysed. The flight speed is Mach 0.8. The horizontal detection directions, downward detection directions and upward detection directions are considered. The results show that in the horizontal plane, the ratio of reflected background infrared radiation to self infrared radiation is about 10 per cent in summer, and 7 per cent in winter; the ratio values distributed in the front and side of the aircraft are bigger than that in the rear; and the existence of atmospheric and ground infrared radiation makes the apparent radiance temperature of the lower part of the aircraft higher than that of the upper part of the aircraft.Defence Science Journal, Vol. 66, No. 1, January 2016, pp. 51-56, DOI: http://dx.doi.org/10.14429/dsj.66.8090

Download Full-text