Color Crosstalk Correction in Linear Stokes Imaging Using a Color Polarization Camera with Simultaneous Three Wavelengths Illumination

Manal Altaweel; Judit Bisbal Amat; Juan Campos Coloma; Angel Lizana; Irene Estévez

doi:10.3390/s26123838

Color Crosstalk Correction in Linear Stokes Imaging Using a Color Polarization Camera with Simultaneous Three Wavelengths Illumination

Manal Altaweel, Judit Bisbal Amat, Juan Campos Coloma, Angel Lizana, Irene Estévez

Departament de Física

Producció científica: Contribució a revista › Article › Recerca › Avaluat per experts

Resum

Les càmeres de color polarimètriques són una tecnologia d'avantguarda que captura simultàniament informació polarimètrica i cromàtica mitjançant l'anàlisi dels estats de polarització en diferents canals de colors, normalment vermell, verd i blau. En general, cada un d'aquests canals pot contenir informació polaritzada diferent. Per tant, mesurar el vector Stokes de polarització a diverses longituds d'ona discretes simultàniament i amb la màxima resolució possible és interessant per a múltiples àrees de recerca. Tanmateix, quan s'utilitza un sensor cromàtic polarimètric comercial sota una il·luminació RGB estreta simultània, no es pot assumir que els seus canals representen canals de longitud d'ona independents. El solapament espectral dels filtres de color introdueix la diafonia del color entre les intensitats de l'analitzador dependents de la longitud d'ona, cosa que pot esbiaixar els paràmetres de Stokes reconstruïts si no s'ha corregit abans de la inversió polarimètrica. S'han proposat diversos mètodes a la literatura per abordar el problema de la diafonia del color, però normalment assumeixen que l'estat de polarització és idèntic en totes les longituds d'ona. Aquesta assumpció generalment no es compleix amb mostres reals, que mostren una despolarització dependent de la longitud d'ona, retard i dicroisme. Fins on sabem, aquest és el primer treball que presenta un mètode per abordar el problema de la diafonia del color sense assumir que l'estat de polarització sigui idèntic en totes les longituds d'ona. A més, s'apliquen tècniques de demosaicatge al domini de Fourier per interpolar dades i reconstruir imatges. L'estudi actual demostra com el mètode proposat permet una recuperació precisa d'informació cromàtica i polarimètrica tant en conjunts de dades sintètiques com reals. Per provar la nostra aproximació, s'han simulat i validat feixos de llum estrets a tres longituds d'ona (47ль, 554ж, 630нм), amb diferents distribucions de polarització espacial i grau de polarització lineal, mitjançant dades simulades i experimentals. Els resultats demostren la viabilitat del mètode per a mesures precises en tres canals de polarització.

Idioma original	Anglès
Número d’article	3838
Nombre de pàgines	20
Revista	Sensors
Volum	26
Número	12
DOIs	https://doi.org/10.3390/s26123838
Estat de la publicació	Publicada - 16 de juny 2026

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10.3390/s26123838

https://ddd.uab.cat/record/331750

Instrumentación y métodos para la adquisición y procesamiento de datos polarimétricos combinados con Inteligencia Artificial para aplicaciones biomédicas y botánicas
Lizana Tutusaus, A. (Investigador/a principal), Estevez Caride, I. (Co-Investigador/a Principal), Canabal Carbia, M. (Col.laborador/a), García-Caurel, E. (Col.laborador/a), Gil Pérez, J. J. (Col.laborador/a), González-Arnay, E. (Col.laborador/a), Iemmi, C. (Col.laborador/a), Mao, Y. (Col.laborador/a), Montes Gonzalez, I. (Col.laborador/a), Yzuel Gimenez, J. (Col.laborador/a), van Eeckhout Alsinet, A. (Col.laborador/a), Campos Coloma, J. I. P. (Investigador/a), Garcia Agreda Vaca, D. (Investigador/a), Heinis, D. (Investigador/a), Márquez Ruiz, A. (Investigador/a), Valles Mari, A. (Investigador/a) & Garreta Passola, N. (Col.laborador/a)
1/09/25 → 31/08/28
Projecte: Projectes i Ajuts a la Recerca

Com citar-ho

@article{4e22b830a6494e639e23820a6021833e,

title = "Color Crosstalk Correction in Linear Stokes Imaging Using a Color Polarization Camera with Simultaneous Three Wavelengths Illumination",

abstract = "Polarimetric color cameras are a forefront technology that simultaneously captures polarimetric and color information by analyzing polarization states across different color channels, commonly red, green, and blue. In general, each of these color channels can carry different polarization information. Therefore, measuring the polarization Stokes vector at several discrete wavelengths simultaneously and with the highest possible resolution is of interest in multiple research areas. However, when a commercial color polarization sensor is used under simultaneous narrowband RGB illumination mode, its channels cannot be assumed to represent independent wavelength channels. Spectral overlap of the color filters introduces color crosstalk between wavelength-dependent analyzer intensities, which may bias the reconstructed Stokes parameters if it is not corrected before polarimetric inversion. Several methods have been proposed in the literature to address the color crosstalk problem but they typically assume that the polarization state is identical for all wavelengths. This assumption does not generally hold for real samples, which exhibit wavelength-dependent depolarization, retardance, and dichroism. To the best of our knowledge, this is the first work presenting a method that addresses the color crosstalk problem without assuming that the polarization state is identical across all wavelengths. In addition, Fourier domain demosaicking techniques are applied to interpolate the data and reconstruct the images. The present study demonstrates how the proposed method leads to an accurate recovery of chromatic and polarimetric information on both synthetic and real-world datasets. To test our approach, narrowband light beams at three wavelengths (470, 554, 630 nm), with different spatial polarization and degree of linear polarization distributions, have been simulated and validated with simulated and experimental data. The results demonstrate the feasibility of the method for accurate three polarization channels measurements.",

keywords = "Optical polarization, Polarization cameras, Stokes parameters",

author = "Manal Altaweel and \{Bisbal Amat\}, Judit and \{Campos Coloma\}, Juan and Angel Lizana and Irene Est{\'e}vez",

year = "2026",

month = jun,

day = "16",

doi = "10.3390/s26123838",

language = "English",

volume = "26",

journal = "Sensors",

issn = "1424-8220",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "12",

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TY - JOUR

T1 - Color Crosstalk Correction in Linear Stokes Imaging Using a Color Polarization Camera with Simultaneous Three Wavelengths Illumination

AU - Altaweel, Manal

AU - Bisbal Amat, Judit

AU - Campos Coloma, Juan

AU - Lizana, Angel

AU - Estévez, Irene

PY - 2026/6/16

Y1 - 2026/6/16

N2 - Polarimetric color cameras are a forefront technology that simultaneously captures polarimetric and color information by analyzing polarization states across different color channels, commonly red, green, and blue. In general, each of these color channels can carry different polarization information. Therefore, measuring the polarization Stokes vector at several discrete wavelengths simultaneously and with the highest possible resolution is of interest in multiple research areas. However, when a commercial color polarization sensor is used under simultaneous narrowband RGB illumination mode, its channels cannot be assumed to represent independent wavelength channels. Spectral overlap of the color filters introduces color crosstalk between wavelength-dependent analyzer intensities, which may bias the reconstructed Stokes parameters if it is not corrected before polarimetric inversion. Several methods have been proposed in the literature to address the color crosstalk problem but they typically assume that the polarization state is identical for all wavelengths. This assumption does not generally hold for real samples, which exhibit wavelength-dependent depolarization, retardance, and dichroism. To the best of our knowledge, this is the first work presenting a method that addresses the color crosstalk problem without assuming that the polarization state is identical across all wavelengths. In addition, Fourier domain demosaicking techniques are applied to interpolate the data and reconstruct the images. The present study demonstrates how the proposed method leads to an accurate recovery of chromatic and polarimetric information on both synthetic and real-world datasets. To test our approach, narrowband light beams at three wavelengths (470, 554, 630 nm), with different spatial polarization and degree of linear polarization distributions, have been simulated and validated with simulated and experimental data. The results demonstrate the feasibility of the method for accurate three polarization channels measurements.

AB - Polarimetric color cameras are a forefront technology that simultaneously captures polarimetric and color information by analyzing polarization states across different color channels, commonly red, green, and blue. In general, each of these color channels can carry different polarization information. Therefore, measuring the polarization Stokes vector at several discrete wavelengths simultaneously and with the highest possible resolution is of interest in multiple research areas. However, when a commercial color polarization sensor is used under simultaneous narrowband RGB illumination mode, its channels cannot be assumed to represent independent wavelength channels. Spectral overlap of the color filters introduces color crosstalk between wavelength-dependent analyzer intensities, which may bias the reconstructed Stokes parameters if it is not corrected before polarimetric inversion. Several methods have been proposed in the literature to address the color crosstalk problem but they typically assume that the polarization state is identical for all wavelengths. This assumption does not generally hold for real samples, which exhibit wavelength-dependent depolarization, retardance, and dichroism. To the best of our knowledge, this is the first work presenting a method that addresses the color crosstalk problem without assuming that the polarization state is identical across all wavelengths. In addition, Fourier domain demosaicking techniques are applied to interpolate the data and reconstruct the images. The present study demonstrates how the proposed method leads to an accurate recovery of chromatic and polarimetric information on both synthetic and real-world datasets. To test our approach, narrowband light beams at three wavelengths (470, 554, 630 nm), with different spatial polarization and degree of linear polarization distributions, have been simulated and validated with simulated and experimental data. The results demonstrate the feasibility of the method for accurate three polarization channels measurements.

KW - Optical polarization

KW - Polarization cameras

KW - Stokes parameters

U2 - 10.3390/s26123838

DO - 10.3390/s26123838

M3 - Article

C2 - 42356811

SN - 1424-8220

VL - 26

JO - Sensors

JF - Sensors

IS - 12

M1 - 3838

ER -

Color Crosstalk Correction in Linear Stokes Imaging Using a Color Polarization Camera with Simultaneous Three Wavelengths Illumination

Resum

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Projectes

Instrumentación y métodos para la adquisición y procesamiento de datos polarimétricos combinados con Inteligencia Artificial para aplicaciones biomédicas y botánicas

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