Keywords
Camera, colorimetry, gamma, knee, aperture correction,
detail enhancement, depth of field, shuttering, film look
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Abstract
There have been many attempts made to generate television
pictures that have "The Film Look" while being
generated electronically. Most have concentrated on mimicking
the temporal appearance of film, while others have concentrated
on contrast handling. Some have done both, and more. The
issues of sharpness and depth of field are rarely tackled.
This document investigates all of these major aspects of
the film look and analyses the properties of film and electronic
image generation to find out exactly how they are different
and why, and how that difference can be minimised. The "BBC
setup" conditions now adopted in some television cameras
exploit this work, notably in PSC camcorders used for HDTV
image capture. Although aimed primarily at HDTV cameras and
their use in attempting to mimic and thereby encourage their
replacement of film usage, the principles explored here could
apply equally to all forms of video cameras provided that
their control ranges are sufficiently flexible.
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