# Tetrachromatic Metamerism - A Discrete, Mathematical Characterization

### Alfredo Restrepo Palacios

#### Abstract

Two light beams that are seen as of having the same colour but that have different spectra are said to be metameric. The colour of a light beam is based on the reading of severel photodetectors with different spectral responses and metamerism results when a set of photodetectors is unable to resolve two spectra. The spectra are then said to be metameric. We are interested in exploring the concept of metamerism in the tetrachromatic case. Applications are in computer vision, computational photography and satellite imaginery, for example.

#### References

- Cohen, J. (1964). Dependency of the spectral reflectance curves of the munsell color chips. Psychon Sci. , vol 1, pp.369-370.
- Cohen, J. and Kappauf, E. (1982). Color stimuly, fundamental metamers and wyszecki's metameric blacks. The American Journal of Psychology, Vol. 95, No. 4, pp. 537-564.
- Jevbratt, L. (2013). Zoomorph - software simulating how animals see. zoomorph.net.
- Restrepo, A. (2011). Colour processing in runge space. SPIE Electronic Imaging, San Francisco.
- Restrepo, A. (2012). Tetrachromatic colour space. SPIE Electronic Imaging, San Francisco.
- Restrepo, A. (2013a). Colour processing in tetrachromatic colour spaces. Visapp Rome.
- Restrepo, A. (2013b). Hue processing in tetrachromatic spaces. SPIE Electronic Imaging, San Francisco.

#### Paper Citation

#### in Harvard Style

Restrepo Palacios A. (2014). **Tetrachromatic Metamerism - A Discrete, Mathematical Characterization** . In *Proceedings of the 9th International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2014)* ISBN 978-989-758-003-1, pages 40-47. DOI: 10.5220/0004660200400047

#### in Bibtex Style

@conference{visapp14,

author={Alfredo Restrepo Palacios},

title={Tetrachromatic Metamerism - A Discrete, Mathematical Characterization},

booktitle={Proceedings of the 9th International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2014)},

year={2014},

pages={40-47},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0004660200400047},

isbn={978-989-758-003-1},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the 9th International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2014)

TI - Tetrachromatic Metamerism - A Discrete, Mathematical Characterization

SN - 978-989-758-003-1

AU - Restrepo Palacios A.

PY - 2014

SP - 40

EP - 47

DO - 10.5220/0004660200400047