9. The computer program product of claim 8 , wherein the space of facial expression comprises a predetermined association of each of a plurality of different facial expressions with a distinct emotion corresponding to the respective facial expression.
9. The computer program product of claim 8 , wherein the space of facial expression comprises a predetermined association of each of a plurality of different facial expressions with a distinct emotion corresponding to the respective facial expression. 10. The computer program product of claim 9 , wherein the parameter-parallel retargeting space is induced, wherein the computer-readable program code is further executable to: generate a plurality of facial layers for the second character; transfer the plurality of parameters from the plurality of facial layers for the first character to the plurality of facial layers for the second character; and combine the plurality of facial layers for the second character based on the composition function.