Linearisation of RGB Camera Responses for Quantitative Image Analysis of Visible and UV Photography: A Comparison of Two Techniques
Jair E Garcia, Adrian G Dyer, Andrew D Greentree, Gale Spring, Philip A Wilksch
PLoS One | PUBLIC LIBRARY SCIENCE | Published : 2013
Linear camera responses are required for recovering the total amount of incident irradiance, quantitative image analysis, spectral reconstruction from camera responses and characterisation of spectral sensitivity curves. Two commercially-available digital cameras equipped with Bayer filter arrays and sensitive to visible and near-UV radiation were characterised using biexponential and Bézier curves. Both methods successfully fitted the entire characteristic curve of the tested devices, allowing for an accurate recovery of linear camera responses, particularly those corresponding to the middle of the exposure range. Nevertheless the two methods differ in the nature of the required input param..View full abstract
Awarded by Colfuturo (Colombia)
Awarded by Australian Research Council
Jair E. Garcia was partially supported by Colfuturo 200818772 (Colombia). A. G. D. was supported by Australian Research Council DP0878968/DP0987989. A. D. G. acknowledges the Australian Research Council for financial support (Project No DP0880466). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.