The number of colors perceived by dichromats when appreciating art paintings under standard illuminants. - João Manuel Maciel Linhares; Paulo Daniel Pinto; Sérgio Miguel Cardoso Nascimento (CGIV/MCS, 2008)

Illuminant spectrum maximizing the number of perceived colors in art paintings. - Paulo Daniel Pinto; João Manuel Maciel Linhares; Sérgio Miguel Cardoso Nascimento (CGIV/MCS, 2008)

Chromatic diversity index - an approach based on natural scenes. - João Manuel Maciel Linhares; Paulo Daniel Pinto; Sérgio Miguel Cardoso Nascimento (CGIV/MCS, 2010)