At 5:21 PM -0800 1/4/98, Stars00000 wrote:
>... I was very interested in the capability they
>demonstrated to draw a box around a segment of a image and change
>interactively the display - almost like the operator was turning a dial to
>change contrast on the box, while the remainder of the image stayed unchaged -
>the best example ws using this technique on M42' s trapezium to bring out the
>4 stars without adjusting the rest of the nebula' s image. I wanted to find
>out more about what program they were using, but didn't - but I assume from
>previous visits its a unix based system.
>
>Does anyone know if any of the image procssing programs generally avvailable
>to amateurs has this capability?

If I understand you correctly, that is a very simply feature. With
Photoshop, for instance, all one needs to do is select the area of interest
and apply whatever transformation is required.

---
Bill Arnett "Science is a way of trying
San Jose, CA USA not to fool yourself." -- Feynman

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