Improving the Reliability/Cost Ratio of Goniophotometric Comparisons

Krishnaswamy, Aravind; Baranosk, Gladimir V.G.; Rokne, Jon G.

doi:10.1080/10867651.2004.10504894

Cited by 18 publications

(13 citation statements)

References 12 publications

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“…In terms of illumination and collection geometries, the HyLIoS model can provide bidirectional reflectance quantities by recording the direction of the outgoing rays using a virtual gonioreflectometer. 27 In addition, one can obtain directionalhemispherical reflectance quantities by integrating the outgoing rays with respect to the collection hemisphere using a virtual spectrophotometer. 28 To enable the full reproduction of our investigation results, we made HyLIoS available online 29 via a model distribution system 30 along with the supporting biophysical data (e.g., refractive indices and extinction coefficients) used in our in silico experiments.…”

Section: Simulation Framework Overviewmentioning

confidence: 99%

Assessing the sensitivity of human skin hyperspectral responses to increasing anemia severity levels

2015

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Abstract. Anemia is a prevalent medical condition that seriously affects millions of people all over the world. In many regions, not only its initial detection but also its monitoring are hindered by limited access to laboratory facilities. This situation has motivated the development of a wide range of optical devices and procedures to assist physicians in these tasks. Although noticeable progress has been achieved in this area, the search for reliable, low-cost, and risk-free solutions still continues, and the strengthening of the knowledge base about this disorder and its effects is essential for the success of these initiatives. We contribute to these efforts by closely examining the sensitivity of human skin hyperspectral responses (within and outside the visible region of the light spectrum) to reduced hemoglobin concentrations associated with increasing anemia severity levels. This investigation, which involves skin specimens with distinct biophysical and morphological characteristics, is supported by controlled in silico experiments performed using a predictive light transport model and measured data reported in the biomedical literature. We also propose a noninvasive procedure to be employed in the monitoring of this condition at the point-of-care.

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Section: Simulation Framework Overviewmentioning

confidence: 99%

Assessing the sensitivity of human skin hyperspectral responses to increasing anemia severity levels

2015

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“…2) spatial (Fig.3,a) as, for example, in the devices of goniometric type [6][7][8][9][10] or in systems using photometric sphere [11,12]. Note that the source of radiation characteristics (pointing, lingering, collimated, diffuse, coherent, monochromatic or white) and the number and type of detectors in this paper are omitted.…”

Section: The Typology Of Tools For Spatial Photometry Of Scattered Ramentioning

confidence: 99%

“…2) Movable source of radiation and stationary detector as, for example, in the study of BRDF [8] (Fig.2,b); 3) Various the position of the source of radiation and detector as, for example, defining a BRDF [9], BRDF and BTDF in [10]. At the incidence of light on the biological object scattering is in the framework of the total solid angle.…”

Section: The Typology Of Tools For Spatial Photometry Of Scattered Ramentioning

confidence: 99%

Spatial photometry of scattered radiation by biological objects

Bezuglaya

Bezuglyi

2013

SPIE Proceedings

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The work is devoted to the analysis of tools for the research of the indicatrix of scattering optical radiation by biological objects and their systematization. Simulation of system of spatial photometry for biomedical diagnostics which is designed to research the scattering within the solid angle 4π and the system of determining the optimal photometric distance of various biological structures were made.

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“…When the absorption coefficient of a turbid medium is not significantly smaller than the scattering coefficient, the diffusion theory provides a poor approximation for the photon transport equation [ Modeled results can be obtained using virtual measurement devices. More specifically reflectance and transmittance curves can be obtained using virtual spectrophotometers [11], and BRDF and BTDF plots can be obtained using virtual goniophotometers [49].…”

Section: Slide 60mentioning

confidence: 99%

Biophysically-based appearance models

Baranoski

2009

ACM SIGGRAPH ASIA 2009 Courses

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Improving the Reliability/Cost Ratio of Goniophotometric Comparisons

Cited by 18 publications

References 12 publications

Assessing the sensitivity of human skin hyperspectral responses to increasing anemia severity levels

Assessing the sensitivity of human skin hyperspectral responses to increasing anemia severity levels

Spatial photometry of scattered radiation by biological objects

Biophysically-based appearance models

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