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Re: How to get a "negative image"? [message #41527] Sun, 31 October 2004 17:24
julio is currently offline  julio
Messages: 31
Registered: December 2003
Member
Yes, that's it. Simpler than I thought... :-)
Thanks

"Kenneth P. Bowman" <kpb@null.com> wrote in message news:<kpb-160DDF.13380430102004@news.tamu.edu>...
> In article <a4c8b080.0410291630.614cdc77@posting.google.com>,
> julio@cpa.unicamp.br (Julio) wrote:
>
>> I have a byte image showing temperatures. Darker pixels show lower
>> temperatures, while clearer pixels show higher temperature. How can I
>> invert this images? I mean I want to show darker pixels as higher
>> temperature and clearer pixels as lower temperature.
>
> image = 255B - image
>
> Cheers, Ken Bowman

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Re: How to get a "negative image"? [message #41529 is a reply to message #41527] Sat, 30 October 2004 11:38 Go to previous message
Kenneth P. Bowman is currently offline  Kenneth P. Bowman
Messages: 585
Registered: May 2000
Senior Member
In article <a4c8b080.0410291630.614cdc77@posting.google.com>,
julio@cpa.unicamp.br (Julio) wrote:

> I have a byte image showing temperatures. Darker pixels show lower
> temperatures, while clearer pixels show higher temperature. How can I
> invert this images? I mean I want to show darker pixels as higher
> temperature and clearer pixels as lower temperature.

image = 255B - image

Cheers, Ken Bowman

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Re: How to get a "negative image"? [message #41530 is a reply to message #41529] Fri, 29 October 2004 19:09 Go to previous message
R.G.Stockwell is currently offline  R.G.Stockwell
Messages: 163
Registered: October 2004
Senior Member
"Julio" <julio@cpa.unicamp.br> wrote in message
news:a4c8b080.0410291630.614cdc77@posting.google.com...
> Hello there!
>
> I have a byte image showing temperatures. Darker pixels show lower
> temperatures, while clearer pixels show higher temperature. How can I
> invert this images? I mean I want to show darker pixels as higher
> temperature and clearer pixels as lower temperature.
>
> Any comments welcome!
>
> Thanks,
> Julio

Do you mean:
negimage = 255 - image
?

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