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From: harry@neuron1.Jpl.Nasa.Gov (Harry Langenbacher)
Newsgroups: comp.graphics
Subject: Re: Brighten
Message-ID: <4474@jato.Jpl.Nasa.Gov>
Date: 2 Aug 90 19:51:32 GMT
References: <1990Jul25.110057.1259@uoft02.utoledo.edu> <1990Jul31.233156.11888@herald.usask.ca>
Sender: news@jato.Jpl.Nasa.Gov
Reply-To: harry@neuron1.UUCP (Harry Langenbacher)
Organization: Jet Propulsion Laboratory, Pasadena CA
Lines: 19

I use this alias on my Sun to brighten rasterfiles, it can be adapted to any formats
handled by fbm software.

alias rasbrightenfbm 'nice +15 unmap<\!^:r.ras|fbnorm \!:2 \!:3|fbquant -S -c\!:4>\!^:r.\!:2.\!:3.\!:4.ras&'

example:

rasbrightenfbm nasalogo.ras 0 200 256

does this:

unmap < nasalogo.ras | fbnorm 0 200 | fbquant -S -c256 > nasalogo.0.200.256.ras

producing a 256 color rasterfile, with all pixels brightened by a factor of
256/200 , right?

- Harry Langenbacher 818-354-9513
harry%neuron1@jpl-mil.jpl.nasa.gov
harry@neuron1.jpl.nasa.gov 128.149.12.7