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Re: Function BYTSCL [message #24635 is a reply to message #24634]

Tue, 10 April 2001 07:42

Steffen Kernchen
Messages: 4
Registered: April 2001

Junior Member

> Of course you can do by hand something similar what bytscl does:
>
> lets say your array is 'a'
>
> minA=min(a,MAX=maxA)
> a=a-minA
> a=byte(float(a)/maxA*255)
>
> (2nd line is 'optional')

when I use the 2nd line, then there is no picture displayed!
if I donï¿½t write this line I see a pic, that is only brighter. There is no
more contrast. :(

> but why you should not use bytarr?
> Only point I can guess is that you have 8bit color and dont want to
> use all colors?

no, itï¿½s an exercise, so that we learn, what BYTSCL does.

I 've a pic and I read it with READ_BMP to get an array. that array I have
to transform to get a better contrast.
but unfortunately without using BYTSCL... :(

cheers,

steffen

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[Message index]

		Re: Function BYTSCL By: marc schellens[1] on Tue, 10 April 2001 18:20
		Re: Function BYTSCL By: davidf on Tue, 10 April 2001 16:43
		Re: Function BYTSCL By: davidf on Tue, 10 April 2001 10:18
		Re: Function BYTSCL By: Jaco van Gorkom on Tue, 10 April 2001 09:37
		Re: Function BYTSCL By: davidf on Tue, 10 April 2001 08:10
		Re: Function BYTSCL By: Liam E. Gumley on Tue, 10 April 2001 07:44
		Re: Function BYTSCL By: Steffen Kernchen on Tue, 10 April 2001 07:42
		Re: Function BYTSCL By: davidf on Tue, 10 April 2001 07:30
		Re: Function BYTSCL By: Jaco van Gorkom on Tue, 10 April 2001 07:18
		Re: Function BYTSCL By: davidf on Tue, 10 April 2001 06:55
		Re: Function BYTSCL By: marc schellens[1] on Tue, 10 April 2001 03:08
		Re: Function BYTSCL By: Steffen Kernchen on Tue, 10 April 2001 03:51
		Re: Function BYTSCL By: davidf on Tue, 10 April 2001 03:17

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