Showing papers in "Infrared Physics & Technology in 2012"

TL;DR: The present efforts are focused on automatic analysis of temperature distribution of regions of interest and their statistical analysis for detection of abnormalities in the area of medical IRT.

TL;DR: Typical engineering solutions using recent technologies are reviewed which could be used to improve the quality of IRT inspection and various automatic diagnostic systems are proposed for faster and more accurate analysis.

TL;DR: The results prove that the proposed automatic detection algorithm for infrared dim target has satisfying detection effectiveness and robustness, and has high detection efficiency and can be used for real-time detection.

TL;DR: Experimental results proved that the proposed adaptive contrast enhancement algorithm can effectively enhance the contrast of infrared images, especially the details of infrared image.

TL;DR: Experimental results show that the proposed 2D LMS filter has stronger target extraction and better background suppression ability compared to the existing 2 D LMS filters.

TL;DR: An improved algorithm based on the contrast mechanism of human visual system (HVS) for infrared small target detection in an image with complicated background is proposed, which demonstrates its superior and reliable detection performance by high detection rate and low false alarm rate.

TL;DR: An improved template matching method for detecting targets is proposed, different from the classic template matching, the projection coefficients obtained from principal component analysis are used as templates and the nonlinear correlation is proposed to measure the similarity, the matching degree.

TL;DR: In this paper, the phase difference between sound and defective region as a function of square root of excitation frequency for glass fiber reinforced polymer specimen is found to be in good agreement with the predictions of Bennet and Patty model.

TL;DR: The first observation of photoluminescence (PL) from the dilute bismide alloy GaSbBi was reported in this paper, where Epitaxial layers are grown by liquid phase epitaxy technique onto GaSB (1 00) substrates and PL is obtained in the near infrared spectral range (lambda similar to 1.6 mu m).

TL;DR: In this article, the authors proposed to use the absolute peak slope time (APST) for quantitative measurement of defect depth, which is obtained by multiplying the original temperature decay with the square root of the corresponding time.

TL;DR: In this paper, a method for simultaneous measurement of the temperature and emissivity of a solid's surface, by the use of infrared radiation, is presented. But this method has no need for a pre-measurement of the surface emissivities.

TL;DR: In this paper, a combination of two experiments carried out with the same setup ( stimulated infrared thermography) allows to estimate straightforwardly and quickly the absolute value of the thermal diffusivity and the thermal conductivity relatively to a reference material.

TL;DR: In this article, a new infrared dim small target enhancement algorithm based on toggle contrast operator is proposed, which is modified and used to construct operators using the image features derived from dilation and erosion operators.

TL;DR: In this article, the structural changes of metal and metal halides with the aid of Raman spectroscopy were investigated with the help of GeTe 4 glasses in the frequency region between 100cm −1 and 300 cm −1.

TL;DR: A novel compensation method derived from infrared thermography of the neonate’s skin was developed which relies on applying model-based correction to the measured temperature and reducing extraneous errors during NIRT.

TL;DR: This paper implemented a reticle seeker simulation tool using MATLAB-SIMULINK, in order to analyze jamming effect of spin-scan and con-scan reticle missile seeker used widely in the world, though it was developed early.

TL;DR: It is shown that nonlinear analysis of breast thermograms using Lyapunov exponents may potentially capable of improving reliability of thermography in breast tumor detection as well as the possibility of differentiating between different classes of breast lesions.

TL;DR: A simple model of dislocation band formed by the dangling bonds of atoms of a dislocation core has been presented and discussed in this paper, where the parameters of this model, which could be verified experimentally, are the average energy of the dislocations band states and the average length of dislocations as well as electron and hole emission coefficients.

TL;DR: In this article, the results of optical absorption and Raman spectroscopy measurements on InSbBi layers grown by liquid phase technique are reported. But the results are limited to the case where the authors only measured the energy band gap reduction up to about 6 ǫ.

TL;DR: In this article, the size and depth of defects in austenitic steel were estimated using pulse infrared thermography, where the defect size was estimated on the basis of surface distribution of the time derivative of the temperature, whereas the defect depth was assessed from the dependence of surface thermal contrast vs cooling time.

TL;DR: In this paper, a printed antenna array on the photonic crystal in the terahertz spectrum has been explored and an equivalent circuit model of the antenna has been proposed and a methodology to investigate various electrical parameters is discussed.

TL;DR: In this article, the performance limiting factors of long and very long wavelength infrared (LWIR and VLW IR) p on n Hg 1− x Cd x Te detectors through numerical simulations at 77 K were investigated.

TL;DR: In this article, two LiTaO 3 pyroelectric detectors were assembled and evaluated using NPL's detector characterisation facilities using vertically aligned multi-walled carbon nanotube (MWCNT) black coatings.

TL;DR: In this article, a laser spectrometer based on a continuous-wave thermoelectrically-cooled distributed feedback quantum cascade laser at ∼2308 cm −1 has been evaluated for measurement of 13 CO 2 / 12 CO 2 isotopic ratio ( δ 13 C) changes in exhaled breath samples and in CO 2 gas flows in the concentration range 1-5% mid-infrared CO 2 absorption spectra were measured in a 542-cm long optical cell using balanced detection whereby the beam passing through the cell was ratioed against a reference beam split-

TL;DR: An improved interframe registration based nonuniformity correction algorithm for focal plane arrays using an outliers exclusion scheme and a variable step size strategy to promote the correction precision considerably, but also eliminate ghosting artifacts effectively is proposed.

TL;DR: In this article, an approach using an artificial neural network is proposed to solve the coefficient inverse problem for determining thermal parameters of a thermal insulating material using an experimental setup equipped with a ThermaCAM PM 595 infrared camera and a frame grabber.

TL;DR: A new method using visible (VIS) and near-infrared (NIR) light transmission is used to evaluate the quality of beef meat based on the marbling detection and it is demonstrated that using NIR light in transmission mode, it is possible to detect the fat not only on the surface, as in traditional methods, but also under the surface.

TL;DR: The accuracy and precision results obtained for the photogrammetric technique open the possibility of extending its use to building inspection tasks.

TL;DR: The energy content, defined as the ratio of heat generated by bacterial metabolic activities to the heat lost from the liquid medium to the surrounding, vary linearly with the bacterial concentration in all the four pathogenic bacteria.

TL;DR: In this paper, a device model for the QDIPs is proposed, which is assumed that the total electron transport and the self-consistent potential distribution under the dark conditions determine the dark current calculation of QDip devices in this model.