An electronically originated image is converted into a modified electronic
image simulating an image originated from a film system and converted into
an electronically displayed image. The technique employed is based on a
set of electronic camera system spectral product curves that are
substantially approximated by a linear combination of a set of spectral
product curves characteristic of the film system. An image is captured
having red, green and blue exposure signals resulting from these
electronic camera system spectral product curves, and the red, green and
blue exposure signals are then converted into a modified electronic image
simulating an image originated from a film system and converted into an
electronically displayed image. Because of the linear approximation
between the spectral product curves, the conversion step can be performed
by a matrixing operation.
