Knowledge based approach to modeling portrait painting methodology

Traditional portrait artists use a specific but open human vision methodology to create a
painterly portrait of a live or photographed sitter. Portrait artists attempt to simplify,
compose and leave out what is irrelevant, emphasizing what is important. While seemingly
a qualitative pursuit, artists use known but open techniques such as relying on source tone
over colour to indirect into a colour temperature model, using "sharpness" to create a
centre of interest, using edges to move the viewers gaze, and other techniques to filter and
emphasize. Our interdisciplinary work attempts to compile and incorporate this portrait
painter knowledge into a multi-space parameterized system that can create an array of
painterly rendering output.