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Prakhar Amba

Prakhar Amba

Post Doctorant

Laboratoire de Psychologie et Neurocognition
Bâtiment Michel Dubois
cs40700 - 38058 Grenoble Cedex 9 France

Tél. : +33 782922356

Phd student in human color vision and image processing. Am working on "Mise en évidence du démosaïçage couleur dans le système visuel humain." I work on designing experiments which can demonstrate demosaicing in the human visual system. The idea is to design stimuli such as "minimum motion" which can be used to identify differences in the color perception of human subjects.
Also am interested in developing demosaicing algorithms for digital cameras which are influenced by the HVS. I work on spatial-spectral optimisation of Color/Spectral Filter Arrays for digital cameras so that we can capture and display better colors.


1) Amba, Prakhar, Jérôme Dias, and David Alleysson. "Random Color Filter Arrays are Better than Regular Ones." Journal of Imaging Science and Technology 60.5 (2016) : 50406-1.

Won the Best Student Paper Award of the CIC 2016 San Diego Conference.

Won the ITEX Award for best Journal Paper of Journal of Imaging Science and Technology 2016.

2) Amba, P., Thomas, J. B., & Alleysson, D. (2017). N-LMMSE Demosaicing for Spectral Filter Arrays. Journal of Imaging Science & Technology, 61(4).


1) Color Filter Arrays imitating the random nature of color arrangement in human cone mosaic. 6th European Workshop on Visual Information Processing (EUVIP). Marseille, France. 25 - 27 October 2016

2) Random Color Filter Arrays are Better than Regular Ones. Norwegian University of Science and Technology, Gjovik. 6th Feb 2017

3) Poster. Random CFAs are better than periodic ones. Lyon, France. GDR BioComp 2016