🚀 go-pugleaf

In article <1992Nov22.205215.5677@news.columbia.edu>,
qiang@cubmol.bio.columbia.edu (Qiang Zheng) writes:
> In article <fred.722416637@dip3> fred@dip3.ee.uct.ac.za (Fred Hoare) writes:
>>I (and the other people in my lab) have a requirement to be able
>>to display 16 bit greyscale images on a Sun workstation. We have
>>several pieces of software that display images, but they all convert
>>the images to 8 bit first. What we require is a display routine that
>>would allow a person to choose what intensity range in the image was
>>displayed on the screen, at any time. I presume this would be done by 
>>changing the way the lookup table gets mapped to the data.
>>
>>Does anyone know of software under X11 that is capable of doing this?
 
Not offhand.  I know exactly what you want though.  I currently
use PV-Wave to do most of my image processing and display.  It 
allows easy display of a desired data window but you have to
re-enter each new max and min value when you want to look
at a new range.   Ideally, one would have a track-ball user interface
in which one axis controls the location of the sliding window
and the other controls the width.

> Me too.  Except I'd like to such software running on a PC.  I do
> some programming, please let me know any hints about programming
> LUTs to display >8 bits images in addition to available software.

I don't believe normal PC's are capable of even 8-bit gray-scale
display because the RGB D/A converters are 6 bits for VGA cards.
Photometrics LTD. has some software that allows the data to be 
easily windowed for display with a fairly decent user interface.
The only catch is that you need to have a certain type of VGA
card (ET4000 chipset I believe) and the image file format is
nonstandard (although they give you the specs - it's basically
16 bits/pixel with a header).   The software is meant to work with 
their camera hardware, but it should function ok without it.  You might
give them a call to see if they offer it without the hardware.
Their phone number is: 602-889-9933 and the name of the software
is IMAGE200.  
 
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|Dick Wallingford      | Internet: dickw@iastate.edu                  |
|Center for NDE        | Packet  : wd0anb@n0an.ia.usa.na              |
|Iowa State University | I'm not a musician, but I play one in a band | 
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