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From: cem@intelca
Newsgroups: net.graphics
Subject: Re: conversion of RGB to video
Message-ID: <19@intelca>
Date: Thu, 24-Apr-86 23:03:00 EDT
Article-I.D.: intelca.19
Posted: Thu Apr 24 23:03:00 1986
Date-Received: Tue, 13-May-86 03:18:29 EDT
References: <657@philabs>
Lines: 33

> I  have  a number of graphic scenes which are displayed on a RGB monitor
> (the system is an IRIS workstation, manufactured by  Silicon  Graphics).
> I  want to create an animated sequence from the scenes by transferring it
> to another medium ( either film or possibly video tape).   Could  anyone
> out  in net land give me some information on either equipment that would
> help in this task or information on how this is usually accomplished.  I
> would like to eventually transfer this to video tape so that it could be
> shown at a conference  on  the  application  of  graphics  to  numerical
> simulation.
> 
> Mark R. Simpson
> Philips Laboratories

The simplest way to do this (and sometimes the least satisfactory) is to
use a 35mm camera to take pictures of the screen in seqence. Use a exposure
of 1 sec for the best results. (Be sure to turn down the room lights!) The
way we did it at the Image Processing Institute was to write out the data
on a DicoMed Image recorder. It had a 4K X 4K crt that exposed directly to
film. For animated sequences we used the 35 MM "cine" format sometimes 
referred to as half frames. This gives quite good results but can be very
expensive. (~$160,000 for computer, recorder, cameras, etc) As a compromise
Polaroid makes something called the Polaroid Pallette that exposes film
from video signals. It is somewhat cheaper ($3000) but when I saw one they
were taking the video from an IBM PC which may or may not mean its video
resolution is limited. 

--Chuck

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