Estimation of reflectance from camera responses by the regularized local linear model.

Spectral Estimation of Printed Colors Using a Scanner, Conventional Color Filters and applying backpropagation Neural Network

Reconstruction the spectral data of color samples using conventional color devices such as a digital camera or scanner is always of interest. Nowadays, multispectral imaging has introduced a feasible method to estimate the spectral reflectance of the images utilizing more than three-channel imaging. The goal of this study is to spectrally characterize a color scanner using a set of conventional...

Performances of classic and weighted versions of some selected methods in estimation of spectral data from camera responses

Separating illuminant and surface reflectance spectra from filtered trichromatic camera measurements

We show how illuminant and reflectance spectra can be accurately measured or separated, up to a multiplicative factor, at each pixel of a scene by using a CCD digital camera instead of a spectroradiometer. In order to obtain suitable spectra of both illuminants and reflectances in a scene, we may use a 6channel measure from the digital 3-channel RGB camera. This is accomplished by taking two im...

Retrieving Three Dimensional Displacements of InSAR Through Regularized Least Squares Variance Component Estimation

Measuring the 3D displacement fields provide essential information regarding the Earth crust interaction and the mantle rheology. The interferometric synthetic aperture radar (InSAR) has an appropriate capability in revealing the displacements of the Earth’s crust. Although, it measures the real 3D displacements in the line of sight (LOS) direction. The 3D displacement vectors can be retrieved ...

Improving the clay, silt and sand of soil prediction by removing the influence of moisture on reflectance using EPO

Moisture is one of the most important factors that affects soil reflectance spectra. Time and spatial variability of soil moisture leads to reducing the capability of spectroscopy in soil properties estimation. Developing a method that could lessen the effect of moisture on soil properly prediction using spectrometry, is necessary. This paper utilises an external parameter orthogonalisation (EP...