Open Access
Digital camera filter design for colorimetric and spectral accuracy
TLDR
A filter optimization was investigated to design a set of filters for a five channel multi-spectral camera, three of which result in high colorimetric performance when used alone, and the full set having high quality spectral performance.Abstract:
A filter optimization was investigated to design a set of filters for a five channel multi-spectral camera, three of which result in high colorimetric performance when used alone, and the full set having high quality spectral performance. Each candidate filter was selected from a set of 33 glass filters with three different thicknesses where filters may be combined in optical series. The effectiveness of the filter selection is demonstrated by computer simulation taking into account the spectral sensitivity of the imaging system, and a comprehensive database of natural and man-made object spectral reflectances.read more
Citations
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Journal ArticleDOI
Multispectral Filter Arrays: Recent Advances and Practical Implementation
TL;DR: The relevant state-of-the-art for multispectral imaging systems is provided and the characteristics of the elements of the multi- filter array-based sensor as a case study are presented.
Journal ArticleDOI
Characterization of trichromatic color cameras by using a new multispectral imaging technique
TL;DR: A novel method for reflectance recovery is introduced that finds the smoothest spectrum consistent with both the colorimetric data and a linear model of reflectance.
Journal ArticleDOI
Multi-Spectral Imaging by Optimized Wide Band Illumination
TL;DR: A novel active imaging approach that uses optimized wide band filtered illumination to obtain multi-spectral reflectance information and utilizes light source and camera spectral information in order to maximize the signal strength and the robustness to noise.
Journal ArticleDOI
Color calibration and fusion of lens-free and mobile-phone microscopy images for high-resolution and accurate color reproduction
TL;DR: It is shown that a lens-free holographic microscope in combination with a cost-effective mobile-phone-based microscope can generate color images of specimens, performing very close to a high numerical-aperture (NA) benchtop microscope that is corrected for color distortions and chromatic aberrations, also matching the chromatic response of human vision.
Evaluation and optimal design of spectral sensitivities for digital color imaging
TL;DR: A new colorimetric quality metric, unified measure of goodness (UMG), which addresses color accuracy and noise performance simultaneously, is introduced and compared with other available quality metrics and is designated as a primary evaluation metric.
References
More filters
Journal ArticleDOI
Measure of goodness of a set of color-scanning filters
Poorvi L. Vora,H. Joel Trussell +1 more
TL;DR: In this article, a measure of the goodness of a set of color-scanning filters is introduced, which relates the space spanned by the scanning filters to the human visual subspace.
Journal ArticleDOI
Figures of merit for color scanners
Gaurav Sharma,H.J. Trussell +1 more
TL;DR: An extension of the most promising measure, based on linearized CIELAB space, is proposed to obtain a new figure of merit that has a high degree of perceptual relevance and also accounts for the varying noise performance of different filters.
Journal ArticleDOI
Metameric correction using parameric decomposition
TL;DR: The theory underlying the parameric decomposition using a Cohen-Kappauf algorithm is explained in this article, and the decomposition is utilized to correct the color differences between paramerics and metameric color differences in order that indices of metamerism may be calculated from conventional formulae.
Journal ArticleDOI
Mathematical methods for the design of color scanning filters
Poorvi L. Vora,H.J. Trussell +1 more
TL;DR: The measure of the goodness of a set of color scanning filters presented in earlier work is used as an optimization criterion to design colorscanning filters modeled in terms of known, smooth, nonnegative functions.
Proceedings Article
Comparison of Spectrally Narrow-Band Capture Versus Wide-Band with a Priori Sample Analysis for Spectral Reflectance Estimation.
TL;DR: Two alternative systems for spectral reconstruction of scene reflectances are compared, both of which utilize a CCD camera modulated by a set of filters after which a system model is applied to derive a pixel-by-pixel estimation of scene reflective spectra.