title: Numerical Demultiplexing of Color Image Sensor Measurements via Non-linear Random Forest Modeling.
abstract: The simultaneous capture of imaging data at multiple wavelengths across the electromagnetic spectrum is highly challenging, requiring complex and costly multispectral image devices. In this study, we investigate the feasibility of simultaneous multispectral imaging using conventional image sensors with color filter arrays via a novel comprehensive framework for numerical demultiplexing of the color image sensor measurements. A numerical forward model characterizing the formation of sensor measurements from light spectra hitting the sensor is constructed based on a comprehensive spectral characterization of the sensor. A numerical demultiplexer is then learned via non-linear random forest modeling based on the forward model. Given the learned numerical demultiplexer, one can then demultiplex simultaneously-acquired measurements made by the color image sensor into reflectance intensities at discrete selectable wavelengths, resulting in a higher resolution reflectance spectrum. Experimental results demonstrate the feasibility of such a method for the purpose of simultaneous multispectral imaging.
authors.affiliation: Department of Systems Design Engineering, University of Waterloo, Ontario, N2L 3G1 Canada.
authors.forename: Jason
authors.initials: J
authors.lastname: Deglint
authors.affiliation: Department of Systems Design Engineering, University of Waterloo, Ontario, N2L 3G1 Canada.
authors.forename: Farnoud
authors.initials: F
authors.lastname: Kazemzadeh
authors.affiliation: Department of Systems Design Engineering, University of Waterloo, Ontario, N2L 3G1 Canada.
authors.forename: Daniel
authors.initials: D
authors.lastname: Cho
authors.affiliation: Department of Systems Design Engineering, University of Waterloo, Ontario, N2L 3G1 Canada.
authors.forename: David A
authors.initials: DA
authors.lastname: Clausi
authors.affiliation: Department of Systems Design Engineering, University of Waterloo, Ontario, N2L 3G1 Canada.
authors.forename: Alexander
authors.initials: A
authors.lastname: Wong
mesh_terms: D003116:Color; D007091:Image Processing, Computer-Assisted; D008962:Models, Theoretical