Spectral Estimation Using Trichromatic Digital Cameras
نویسندگان
چکیده
In this paper we present an alternative way to capture multi-spectral images using a conventional trichromatic digital camera combined with either absorption filters or multi-illumination. The goal in this research has focused on reducing the cost and complexity of the image acquisition system while preserving its colorimetric and spectral accuracy. This paper describes this new paradigm and summarizes recent research results.
منابع مشابه
Spectral reproduction from scene to hardcopy Part I – Multi-spectral acquisition and spectral estimation using a Trichromatic Digital Camera System associated with absorption filters – New results
This report summarizes an experiment performed to evaluate the accuracy of the new multi-spectral acquisition system based on a priori spectral analysis followed by wide-band capture combining trichromatic camera and absorption filters. This report will be focused on the multi-spectral capture and spectral estimation based on a new set of complex image representing a painting and a series of pr...
متن کاملSeparating 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...
متن کاملA Comparative Analysis of Spectral Reflectance Estimated in VariousSpaces Using a Trichromatic Camera System
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...
متن کاملMulti-spectral Image Acquisition and Spectral Reconstruction using a Trichromatic Digital Camera System associated with absorption filters Part II Technical Approach
This report summarizes the technical approach using linear and non-linear iterative models in order to predict the spectral reflectance from the digital counts of a trichromatic Digital Camera System associated with absorption filters.
متن کاملA Practical UAV Remote Sensing Methodology to Generate Multispectral Orthophotos for Vineyards: Estimation of Spectral Reflectance Using Compact Digital Cameras
This paper explores the use of compact digital cameras to remotely estimate spectral reflectance based on unmanned aerial vehicle imagery. Two digital cameras, one unaltered and one altered, were used to collect four bands of spectral information (blue, green, red, and near-infrared [NIR]). The altered camera had its internal hot mirror removed to allow the sensor to be additionally sensitive t...
متن کامل