نتایج جستجو برای: نظریه تکثابتی kubelka

تعداد نتایج: 34177  

2000
Jan-Mark Geusebroek Arnold W. M. Smeulders Rein van den Boomgaard

This paper presents the measurement of object reflectance from color images. We exploit the Gaussian scalespace paradigm to define a framework for the robust measurement of object reflectance from color images. Illumination and geometrical invariant properties are derived from a physical reflectance model based on the Kubelka-Munk theory. Imaging conditions are assumed to be white illumination ...

2003
Mark Shaw Gaurav Sharma Raja Bala Edul N. Dalal

The use of multiple substrates in color printers requires color characterization for each of the individual substrates. A full re-characterization for each substrate is measurement and labor intensive. In this article, a variety of methods are proposed and evaluated for determining the color characterization for a new substrate based on a complete characterization on a reference substrate and a...

2000
Jan-Mark Geusebroek Rein van den Boomgaard Arnold Smeulders

Color Invarian e Jan-Mark Geusebroek, Rein van den Boomgaard and Arnold Smeulders Intelligent Sensory Information Systems Department of Computer S ien e University of Amsterdam The Netherlands This paper presents the measurement of olored obje t re e tan e, under di erent, general assumptions regarding the imaging onditions. We exploit the Gaussian s ale-spa e paradigm for olor images to de ne ...

2017
Omnia Hamdy Jala El-Azab Tarek A Al-Saeed Mahmoud F Hassan Nahed H Solouma

Optical differentiation is a promising tool in biomedical diagnosis mainly because of its safety. The optical parameters' values of biological tissues differ according to the histopathology of the tissue and hence could be used for differentiation. The optical fluence rate distribution on tissue boundaries depends on the optical parameters. So, providing image displays of such distributions can...

2011
Angamuthuraj Chithambararaj Arumugam Chandra Bose

Hexagonal molybdenum oxide (h-MoO(3)) was synthesized by a solution based chemical precipitation technique. Analysis by X-ray diffraction (XRD) confirmed that the as-synthesized powder had a metastable hexagonal structure. The characteristic vibrational band of Mo-O was identified from Fourier transform infrared spectroscopy (FT-IR). Scanning electron microscopy (SEM) and transmission electron ...

2012
S. T. Hussain M. Mazhar Asima Siddiqa Hina Javid M. Siddiq

Sulfur doped titanium dioxide anatase nano-photocatalyst with different copper loadings (5, 10, 15, and 20 w/w %) was synthesized by hydrothermal method. The fabricated nanocatalysts were found to have high surface area, high aspect ratio, good surface morphology and high metals dispersion. The synthesized nanocatalysts were characterized by X-ray powder diffraction (XRD), Scanning electron mic...

Journal: :Journal of Visualization and Computer Animation 2005
Tom Van Laerhoven Frank Van Reeth

Existing work on applications for thin watery paint is mostly focused on automatic generation of painterly-style images from input images, ignoring the fact that painting is a process that intuitively should be interactive. Efforts to create real-time interactive systems are limited to a single paint medium and results often suffer from a trade-off between realtimeness and simulation complexity...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2007
Mathieu Hébert Roger David Hersch Jean-Marie Becker

We propose a compositional model for predicting the reflectance and the transmittance of multilayer specimens composed of layers having possibly distinct refractive indices. The model relies on the laws of geometrical optics and on a description of the multiple reflection-transmission of light between the different layers and interfaces. The highly complex multiple reflection-transmission proce...

2000
Francisco H. Imai Roy S. Berns

Principal component analysis coupled with multi-channel digital image capture is a powerful technique for spectral scene estimation. Most often, the linear modeling is performed using a spectral reflectance factor. However, it is well known that for many subtractive coloration systems, spectral reflectance is nonlinearly related to colorant amount. Accordingly, the accuracy of spectral reconstr...

Journal: :Journal of biomedical optics 2012
Arindam Roy Rajagopal Ramasubramaniam Harshavardhan A Gaonkar

Kubelka–Munk (K-M) theory is a phenomenological light transport theory that provides analytical expressions for reflectance and transmittance of diffusive substrates such as tissues. Many authors have derived relations between coefficients of K-M theory and that of the more fundamental radiative transfer equations. These relations are valid only in diffusive light transport regime where scatter...

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